EAON - INFO N° 57 2007, April to June |
167 observations have been performed during 2007, April to June ( 38 positive
or possibly positive) about 49 events
( 10 positive or possibly positive) by 94 observers, from the 17 following
countries (and numbers of observers) :
AT = Austria ( 3 ), BE = Belgium ( 3 ), BY = Belarus ( 2 ), CH = Switzerland
( 1 ), CZ = Czech Republic ( 20 ),
DE = Germany ( 34 ), DK = Denmark ( 1 ), ES = Spain ( 4 ), FR = France ( 9 ), HU
= Hungary ( 1 ), IT = Italy ( 3 ),
NL = The Netherlands ( 5 ), RO = Romania ( 1 ), SK = Slovakia ( 3 ), TR = Turkey
( 1 ), UA = Ukraine ( 1 ),
UK = United Kingdom ( 2 ).
Bernd GAEHRKEN (GKB) observed the Melitta event from Austria but has been registered as a German observer.
You will find in the table hereafter the list of the observers’ abbreviations in alphabetical order, with the number of observations made by each of them. Welcome to the new observers (in bold characters) !
JLX |
Jean LECACHEUX |
3 |
FR |
|||||
JNK |
Tomas JANIK |
4 |
CZ |
|||||
ANT |
Milan ANTOS |
1 |
CZ |
KHL |
Mike KOHL |
2 |
CH |
|
AUD |
Maurice AUDEJEAN |
4 |
FR |
KND |
Detlev KOSCHNY |
1 |
NL |
|
Helmut BAUER |
1 |
KRM |
Michael KROCIL |
1 |
CZ |
|||
with Otto FARAGO (FAR) |
1 |
KUS |
Peter KUSNIRAK |
1 |
CZ |
|||
BAL |
Ladislav BARAK |
2 |
CZ |
LDT |
Tamas LADANYI |
1 |
HU |
|
LEI |
Frank LEITER |
1 |
DE |
|||||
LJM |
Jean Marie LOPEZ |
1 |
FR |
|||||
BLI |
Mogens BLICHFELDT |
1 |
DK |
with Anne-marie JACQUEY |
||||
BLM |
Lex BLOMMERS |
2 |
NL |
LOZ |
Frantisek LOMOZ |
1 |
CZ |
|
BTA |
Zdenek BRICHTA |
1 |
CZ |
MHH |
Helmut MICHELS |
1 |
DE |
|
BTG |
René BOURTEMBOURG |
2 |
BE |
MNK |
Jan MANEK |
1 |
CZ |
|
BUL |
Henk BULDER |
4 |
NL |
MRX |
Harald MARX |
1 |
DE |
|
MVZ |
Zdenek MORAVEC |
1 |
CZ |
|||||
NBL |
Wim NOBEL |
1 |
DE |
|||||
DEN |
Martin DENTEL |
1 |
DE |
NVI |
Vitali NEVSKI |
1 |
BY |
|
DGG |
Gerhard DANGL |
10 |
AT |
OKE |
Oliver KLOES |
2 |
DE |
|
DNZ |
Helmut DENZAU |
2 |
DE |
OTA |
Otta SANDOR |
2 |
CZ |
|
EBA |
Eric BARBOTIN |
1 |
FR |
Michael PARL |
5 |
|||
ENK |
Peter ENSKONATUS |
1 |
DE |
with Klaus NAGEL (NGK) |
1 |
|||
EWL |
Dieter EWALD |
1 |
DE |
PCI |
Paolo CORELLI |
2 |
IT |
|
FAP |
Pierre FARISSIER |
1 |
FR |
PIC |
Christian PINTER |
1 |
DE |
|
FMY |
Francois MEYER |
1 |
FR |
PLK |
Jiri POLAK |
2 |
CZ |
|
FOC |
Mario FERNANDEZ-OCANA |
1 |
ES |
PRB |
Vaclav PRIBAN |
2 |
CZ |
|
Franz STARK |
4 |
RAI |
Manfred RAIN |
3 |
DE |
|||
with Uwe CZUBAYKO |
1 |
RHE |
Eckerhardt ROTHENBERG |
2 |
DE |
|||
GAA |
Adrian GALAD |
2 |
SK |
RTH |
Wolfgang ROTHE |
6 |
DE |
|
GHD |
S. GEBHARD |
1 |
DE |
RTT |
Michal ROTTENBORN |
2 |
CZ |
|
GJD |
Stefan GAJDOS |
1 |
SK |
RVA |
Joan ROVIRA |
1 |
ES |
|
Bernd GAEHRKEN |
1 |
SBG |
Gerard SBARUFETTI |
1 |
IT |
|||
with Claus-Peter HEIDMAN (HCP) |
1 |
SCS |
Stefan SCHUCHHARDT |
1 |
DE |
|||
with C.-P. HEIDMAN (HCP) and Klaus NAGEL (NGK) |
1 |
SFH |
Hans Robert SCHAEFER |
1 |
AT |
|||
Bernd GAEHRKEN |
1 |
AT |
SMD |
Libor SMID |
6 |
CZ |
||
HAL |
Karel HALIR |
3 |
CZ |
|||||
HDG |
Henk de GROOT |
2 |
NL |
|||||
Claus-Peter HEIDMAN |
|
SPU |
Klaus SPRUCK |
1 |
DE |
|||
with Bernd GAEHRKEN (GKB) |
1 |
SVA |
Sven ANDERSSON |
2 |
DE |
|||
with Josef HUBER |
1 |
TKC |
Leonid TKACHOOK |
1 |
UA |
|||
with B. GAEHRKEN (GKB) and K. NAGEL (NGK ) |
1 |
trt |
TAROT (see below) |
20 |
FR |
|||
HRB |
Herbert RAAB |
2 |
AT |
UCK |
Kadir ULUK |
1 |
TR |
|
UTF |
Ugo TAGLIAFERRI |
1 |
IT |
|||||
VCA |
Dita VETROVCOVA |
1 |
CZ |
|||||
HRU |
Harrie RUTTEN |
1 |
NL |
|||||
HTS |
Sorin HOTEA |
1 |
RO |
|||||
HZL |
Dalibor HANZL |
1 |
CZ |
WCH |
Christoph WINDISCH |
1 |
DE |
|
IVY |
Igor VINYIAMINOV |
2 |
BY |
WSG |
Wolfgang STRICKLING |
2 |
DE |
|
JDJ |
Jaromir JINDRA |
1 |
CZ |
XBS |
Xavier BROS |
1 |
ES |
|
JDO |
Jose DORESTE |
1 |
ES |
ZNA |
Miroslav ZNASIK |
1 |
SK |
TAROT (Acronym for "Télescope à Action Rapide pour les Objets Transitoires") is an automatic telescope, located at Calern Observatory, dedicated to g -rays bursts optical study; when available, it can be used for various survey programs.
2007 (April to June) Observations
Observations are visual and negative, excepted when otherwise specified. All times are in UTC.
2007.04.03 : ( 965 ) Angelica /
2UCAC 46825097 SORSOR : with Edward SIMONSON, videorecording, many interruptions due to clouds; they were in the predicted path, but registered no occultation longer than 1 s.
2007.04.03 : ( 544 ) Jetta / TYC
5513-01455-1 JLXJLX : videorecording, was located about 36 km NE relative to S. Preston's predicted centreline, for a path width of 56 km.
2007.04.03 : ( 5191 ) 1990VO3 / TYC
0761-00806-1 BULBUL was at about two path widths from the centreline; incertitude was large for this small asteroid (16 km).
2007.04.04 : ( 926 ) Imhilde / TYC
2416-00475-1 DGG SMDDGG : videorecording, clouds ; SMD : videorecording
2007.04.05 : ( 488 ) Kreusa /
2UCAC 41157396 BLM BTG FST GAA HALand two positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
BUL |
N 52 56 20.5 |
E 06 52 48.8 |
+8 m |
21:04:16.24 ± 0.2 s |
21:04:18.20 ± 0.1 s |
1.96 ± 0.05 s |
JNK |
N 50 44 00 |
E 14 00 09 |
+460 m |
21:04:25.7 ± 0.15 s |
21:04:30.7 ± 0.1 s |
5.0 ± 0.1 s |
HAL, PRB, SMD : videorecording
BTG : no occ. > 0.5 s. HDG :
videorecording, no occ. > 0.2 s. WSG : videorecording, no occ. > 0.15 s.BUL : both
disappearance and reappearance were gradual events, estimated duration 0.3 s and 0.15 s resp.;The two chords and the PRB’ negative observation lead to an elongated profile, with long axis running parallel to the asteroid motion. A significant part (at least a half) of the profile is lacking, as the (488) Kreusa mean diameter is about 150 km. The shadow path must have been shifted by at least half of its width, toward NE, relative to the prediction.
2007.04.08
: ( - ) 2000CJ105 / 2UCAC 34287196 XBS2000CJ105 is a Trans Neptunian Object (TNO)
2007.04.09
: ( 4157 ) Izu / TYC 2426-00200-1 DGGDGG : videorecording, some interruptions due to clouds; incertitude was large for this 21 km asteroid
2007.04.13
: ( 2621 ) Goto / TYC 1872-01026-1 FMY SBGSBG : videorecording, was in the predicted track.
FMY : videorecording,
no occ. > 0.2 s, registered a blink at 21:18:45.4 ± 0.2 s, 20 s after the predicted appulse time for his location.2007.04.14 : ( 1606 ) Jekhovsky /
2UCAC 26697134 AKF with LMG HCP with GKB PARAKF:
videorecording, no occ. >0.3 s; HCP : videorecording, no occ. >0.2 s; PAR : videorecording, no occ. >1 s;RTH : videorecording, no occ. > 0.6 s.
HCP and PAR were in the predicted track ; incertitude was large for this 26 km asteroid.
2007.04.16
: ( 297 ) Caecilia / TYC 5530-00985-1 AUD trtand two positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
EBA |
N 45 41 58.0 |
E 00 02 11.0 |
+62 m |
22:38:29.6 ± 1 s |
22:38:33.05 ± 1 s |
3.45 ± 0.05 s |
LJM |
N 44 02 22 |
E 03 30 13 |
+1300 m |
22:38:08.37 ± ? s |
22:38:12.09 ± ? s |
3.72 ± ? s |
AUD, EBA, LJM : CCD drift-scan
LJM with Anne-marie JACQUEY ; EBA : first positive observation. Both were effectively in the predicted path, close to the centreline. The two chords are in good agreement; the max predicted duration was 2.8 s : (297) Caecilia is elongated and/or larger than supposed (39 km).
2007.04.18
: ( 479 ) Caprera / TYC 5015-00309-1 DNZand one positive observation :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
BLI |
N 45 41 58.0 |
E 00 02 11.0 |
+62 m |
23:06:04.62 ± 0.07 s |
23:06:08.18 ± 0.07 s |
3.56 ± 0.07 s |
BLI, DNZ : videorecording
;BLI was in the predicted path and registered an event with duration in agreement with the expected one, so prediction must have been exact.
2007.04.21 : ( 17 ) Thetis / TYC
1407-00130-1 BAH BUL DGG HAL HRB RTHand 15 positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
NBL |
N 52 09 19.0 |
E 04 28 59.3 |
+14 m |
22:45:44.2 ± 0.2 s |
22:45:50.6 ± 0.2 s |
6.4 ± 0.2 s |
KND |
N 52 15 55.5 |
E 04 29 26.2 |
-3 m |
22:45:42.38 ± 0.05 s |
22:45:49.47 ± 0.05 s |
7.09 ± 0.05 s |
BLM |
N 52 09 30 |
E 04 31 48 |
+15 m |
22:45:44.15 +0.3/-0.6 s |
22:45:50.6 ± 0.2 s |
6.45 ± 0.2 s |
HDG |
N 51 49 46.4 |
E 05 47 57.3 |
+7 m |
22:45:50.55 ± 0.2 s |
22:45:57.8 ± 0.2 s |
7.25 ± 0.2 s |
RAI |
N 51 19 07 |
E 06 15 13 |
+43 m |
22 45 58.2 ± 0.3 s |
22 46 04.3 ± 0.3 s |
6.1 ± 0.1 s |
FST |
N 51 34 40.4 |
E 07 12 32.9 |
+62 m |
22 46 00.1 ± 0.6 s |
22 46 04.0 ± 0.6 s |
3.9 ± 0.8 s |
OKE |
N 50 08 17.4 |
E 08 21 50.4 |
+304 m |
22:46:15.11 ± 0.02 s |
22:46:22.05 ± 0.02 s |
6.94 ± 0.02 s |
LEI |
N 50 32 28 |
E 08 31 27 |
+261 m |
22:46:12.9 ± 0.1 s |
22:46:19.4 ± 0.1 s |
6.5 ± 0.15 s |
SPU |
N 50 34 46 |
E 08 37 39 |
+156 m |
22:46:13.1 ± 0.1 s |
22:46:19.2 ± 0.1 s |
6.1 ± 0.1 s |
BDR |
N 49 46 29.2 |
E 09 57 30.2 |
+280 m |
22:46:23.65 ± 0.08 s |
22:46:30.41 ± 0.08 s |
6.76 ± 0.08 s |
WSG |
N 49 44 08 |
E 10 01 46.3 |
+330 m |
22:46:24.1 ± 0.1 s |
22:46:30.9 ± 0.1 s |
6.8 ± 0.1 s |
HCP |
N 48 07 18.9 |
E 11 36 25.2 |
+573 m |
22:46:45.9 ± 0.15 s |
22:46:49.35 ± 0.15 s |
3.45 ± 0.2 s |
GKB |
N 48 48 04 |
E 11 58 59 |
+400 m |
22:46:38.7 ± 0.15 s |
22:46:45.1 ± 0.15 s |
6.4 ± 0.15 s |
PAR |
N 48 09 58 |
E 12 00 12 |
+560 m |
22:46:44.45 ± 0.15 s |
22:46:51.4 ± 0.15 s |
6.95 ± 0.2 s |
SFH |
N 47 54 32.98 |
E 13 21 06.09 |
+700 m |
22:46:50.68 ± 0.05 s |
22:46:57.50 ± 0.05 s |
6.82 ± 0.05 s |
BAH, BDR, DGG, GKB, HAL, HDG, HCP, HRB, KND, OKE, PAR, RTH, SFH, SMD, WSG : videorecording
;GAA: CCD drift scan; GKB :
parallel visual observation with 13 inch Dobson; VIG : with P. De CAT, CCD imagingHCP : with J. HUBER, D and R gradual; PAR : with Klaus NAGEL (NGK).
Thomas WINTERER observed a 2 s occultation from N 48 32 41.4 E 10 51 39.3 + 433 m, at nearly 22:46:37
Ronald STOYAN observed a 1.5 s occultation from N 49 37 31.7 E 11 01 06.7 +275 m, at nearly 22:46:30
Chords can be fitted with an elliptic profile, 76 × 63 km. This has to be compared to the mean circular value of 90 km, used for calculation. Fit can be improved, taking into account the binarity of the star (r = 4.7 ± 0.4", q = 113 ± 8°).
Observations (especially HCP positive and HRB and RTT negatives ones) show the path has been shifted by 0.2 times its width, toward SW.
2007.04.24
: ( 872 ) Holda / 2UCAC 30704170 CQU trtCQU : with VCD, CCD drift-scan
2007.04.26 : ( 519 ) Sylvania / TYC
2426-00023-1 DNZ FAR with BAH KHL MHHand one uncertain observation :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
BTG |
N 50 17 40.5 |
E 05 06 25.8 |
+321 m |
19:21:47.0 ± 0.1 s |
19:21:47.8 ± 0.2 s |
0.8 s |
DNZ, FAR, MHH, PAR : videorecording;
PCI : CCD drift scanBTG observation, performed in strong crepuscular light must be related to (519) Sylvania, since the appulse was predicted at 19:21:52 s for his location. BTG was just at the northern border of the predicted shadow path, so the real one must have been shifted slightly toward North (the max predicted duration is 1.6 s for a diameter of 48 km).
2007.04.27 : ( 31344 ) 1998OM12 / TYC
4963-01307-1 BUL FST GJD JNK RAIand two positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
RHE |
N 52 29 03.0 |
E 13 36 42.9 |
+40 m |
00:13:14.09 ± 0.1 s |
00:13:16.22 ± 0.1 s |
2.15 ± 0.1 s |
RTH |
N 52 28 10.0 |
E 13 28 57.6 |
+37 m |
00:13:14.36 ± 0.02 s |
00:13:16.52 ± 0.02 s |
2.16 ± 0.01 s |
FST, RHE, RTH, SMD : videorecording;
GJD : CCD drift-scan. FST : no occ. > 0.1 s; JNK : no occ. > 0.5 s.RHE and RTH were effectively close to the predicted centreline. Note that max predicted duration was 1.2 s : the asteroid is elongated and/or larger than supposed (20 km)
2007.04.27
: ( 2476 ) Andersen / TYC 0877-00827-1 FSTFST :
videorecording, no occ. > 0.1 s. Incertitude was very large for this small asteroid (22 km)2007.05.01
: Charon / 2UCAC 25823155 JDOJDO : CCD drift-scan
Charon is the first discovered satellite of the transneptunian planet (134340) PLUTO
2007.05.05
: ( 44 ) Nysa / 2UCAC 39481243 AUD trt2007.05.05
: ( 252 ) Clementina / 2UCAC 27321015 TKCDistance from the predicted path centreline: 41 km N, for a diameter of 69 km
2007.05.11
: ( 1151 ) Ithaka / TYC 6254-00528-1 JLX trtJLX :
videorecording; path was expected close to Pic-du-Midi, but incertitude was large for this small asteroid (22 km)2007.05.12 : ( S/2005 P1 ) Hydra /
2UCAC 25822467 B JLXJLX :
videorecording; (S/2005 P1) Hydra is the outer satellite of the transneptunian planet (134340) PLUTO. Target star is the component B of a binary. Path was expected across north Morocco or the south tip of Spain.2007.05.18 : ( 1177 ) Gonnessia /
HIP 76293 ANT BAL DGG ENK EWL GAA GHD HAL HRH HZL JDJ JNK KRM KUS LOZ MRX MVZ OKE OTA PAR PIC PRB RHE RTT SVA WCHand 6 positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
BTA |
N 49 47 55 |
E 13 26 41 |
+330 m |
22:26:09.4 ± 0.1 s |
22:26:11.85± 0.1 s |
2.45 ± 0.15 s |
HRB |
N 48 06 54.9 |
E 14 13 40.9 |
+327 m |
D1 - 22:26:07.33 ± 0.03 s D2 - 22:26:09.25 ± 0.03 s |
R1 - 22:26:10.89 ± 0.03 s R2 - 22:26:14.57 ± 0.03 s |
3.56 ± 0.03 s |
MNK |
N 50 01 54.8 |
E 14 22 18.1 |
+386 m |
D1 - 22:26:11.82 ± 0.01 s D2 - 22:26:12.41 ± 0.01s |
R1 - 22:26:12.06 ± 0.01s |
0.24 ± 0.01s 0.17 ± 0.01s |
PLK |
N 49 42 21.6 |
E 13 19 32.3 |
+367 m |
22:26:18.55 ± 0.1 s |
22:26:22.75 ± 0.1 s |
4.2 ± 0.1 s |
SMD |
N 49 43 48.2 |
E 13 23 34.5 |
+340 m |
22 26 13.31 ± 0.02 s |
22 26 19.44 ± 0.02 s |
6.13 ± 0.03 s |
VCA |
N 49 42 21.6 |
E 13 19 32.3 |
+367 m |
22:26:19.4 |
22:26:24.0 |
4.6 s |
DGG, ENK, GHD, HRB, HZL, MNK, OKE, PAR, PRB, RHE, SMD, SVA, WCH : videorecording;
GAA, HRH, KUS
: CCD drift-scan;HRH : with T. Henych; OTA :
has started 3 minutes too late, was in double station with BAL; PLK : in double station with VCAPLK : both D and R gradual, flat bottom about 1 magnitude below maximum; VCA : D instantaneous (star invisible), then gradual brightening lasting 5 s ; SMD : the star brightness dropped by approx. 2 mag only.
Taking into account the star binarity (see below), chords can be fitted with an elliptic profile, 95 × 71 km. This has to be compared to the mean circular value of 92 km, used for calculation.
Target star is known as a binary and reduction leads to the parameters r = 42", q = 77°. HRB
(the first positive observation for this observer!) registered the occultation of successively the two components; SMD, BTA, PLK and VCA, observed the occultation of the same one component. MNK : a grazing occultation remains possible, but would imply that BAL missed a short occultation; the event may be spurious because of the bad signal to noise ratio of the videorecording.Centreline was predicted over Berlin (ENK’ location). Nevertheless, according to the drawn profile, SMD observed a nearly central event : path has been shifted by one of its width, toward SW.
2007.05.20
: ( 2475 ) Semenov / 2UCAC 27852340 DGG RTHDGG, RTH : videorecording
2007.05.20
: ( 399 ) Persephone / TYC 0837-01410-1 DGGand two positive observations :
Abbr. |
Latitu de |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
RTH |
N 52 28 10.0 |
E 13 28 57.6 |
+37 m |
22:36:04.6 ± 0.15 s |
22:36:08.9 ± 0.15 s |
4.3 ± 0.2 s |
SVA |
N 52 24 49.7 |
E 13 39 51.5 |
+40 m |
22:36:04.9 ± 0.15 s |
22:36:09.1 ± 0.15 s |
4.2 ± 0.2 s |
DGG, RTH, SVA : videorecording
RTH and SVA both observed an event with duration significantly longer than
the predicted one (3.5 s) : (399) Persephone is elongated and/or larger than
expected. Assuming they were both close to the centreline, the shadow path has
been significantly shifted (by about its width) toward west.
2007.05.21 : ( 303 ) Josephina / TYC
0837-00779-1 DGG HCP with GKB and NGK PARDGG : videorecording;
HCP : videorecording, no occultation > 0.2s.PAR : videorecording,
no occultation > 1s despite an observing station within predicted path.PCI : CCD drift scan, negative, despite a favourable prediction, too.
The shadow path has been significantly shifted but the lack of positive observation lets its position remaining unknown.
2007.05.28
: ( 4597 ) Consolmagno / TYC 6230-00334-1 AUDAUD : CCD drift scan; incertitude was large for this small asteroid (18 km).
2007.06.03 : ( 3191 ) Svanetia /
HIP 87809 FOCFOC :
videorecording2007.06.04 : ( 3256 ) Daguerre / TYC
4979-00824-1 NVI2007.06.07 : ( 3638 ) Davis /
2UCAC 38975461 RVA trtRVA :
videorecording2007.06.09
: ( 3316 ) Herzberg / 2UCAC 27703697 DGGDGG : videorecording
2007.06.14 : ( 676 ) Melitta /
HIP 95228 DGG KHL PAR trtand 6 positive observations :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
FAP |
N 45 31 33.3 |
E 05 08 41.3 |
+350 m |
00:17:52.71 ± 0.04 s |
00:17:57.29 ± 0.02 s |
4.58 ± 0.04 s |
GKB |
N 47 34 34 |
E 11 38 45 |
+900 m |
00:15: 44 ± ? |
00:15:46 ± ? |
max. 2 s |
HTS |
N 47 55 54.2 |
E 23 52 45.05 |
+266 m |
00:14:43.49 ± 0.05 s |
00:14:54.525 ± 0.03 s |
11.04 ± 0.05 s |
IVY |
N 50 46 46.55 |
E 39 22 57.55 |
+234 m |
00:12:31.1 ± 0.5 s |
00:12:32.9 ± 0.3 s |
1.75 ± 0.6 s |
IVY |
N 50 46 46.55 |
E 39 22 57.55 |
+234 m |
00:12:35.85 ± 3.5 s |
00:12:37.5 ± 03.2 s |
1.65 ± 0.2 s |
LDT |
N 47 06 16 |
E 17 54 30 |
+234 m |
00:15:41.45 |
00:15:52.15 |
10.7 ± 0.04 s |
DGG, FAP, PAR : videorecording; IVY : double observation, visual + CCD drift scan; LDT : star track
; KHL : possible short occultation missed due to thin clouds; PAR : no occ. > 0.1 sChords can be fitted by an elliptic profile (113 ± 3) km × (72 ± 5) km, to be compared with the 80 km mean diameter used for calculations.
From its 2006 lightcurve, R. BEHREND (Observatory of Geneva University)
suggested that (676) Melitta could be a binary.
A. LOSYUK and V. MECHINSKY suggested that two of the chords (IVY and GKB ones)
can be interpreted by the presence of a 20 km satellite.
2007.06.18
: ( 3906 ) Chao / TYC 0973-00265-1 UCK trtUCK : CCD drift-scan
2007.06.19
: ( 1076 ) Viola / 2UCAC 25213742 BAL DGG JNK OTAand one uncertain positive observation :
Abbr. |
Latitude |
Longitude |
Height |
Disappearance UT |
Reappearance UT |
Duration |
ZNA |
N 49 12 20.6 |
E 18 45 06.6 |
+ 404 m |
00:35:53.62 ± ? |
00:35:54.90 ± ? s |
1.28 ± ? s |
BAL, DGG and OTA : videorecording; BAL and OTA in double station
ZNA : star track, was effectively close to the predicted centreline. The event occurred 20 s after the predicted appulse time (00:36:15)
but incertitude was large for this small asteroid (23 km). Note that max predicted duration was 2.7 s.2007.06.24
: ( 502 ) Sigune / HIP 89918 DEN RTHDEN: videorecording ; RTH videorecording, interruption due to clouds.
I
ncertitude was great for this very small asteroid (16 km).2007.06.24
: ( 18895 ) 2000GJ108 / 2UCAC 32416626 AUDAUD : CCD drift scan
2007.06.26
: ( 2147 ) Kharadze / TYC 5627-00933-1 FST SORFST : videorecording, observation with Uwe CZUBAYKO, two interruptions due to clouds
SOR : with Edward SIMONSON, videorecording
2007.06.29
: ( 484 ) Pittsburghia / TYC 5663-00310-1 UTFThe following 12 events have been observed by TAROT only – all negative results :
2007/04/06 10784 Noailles TYC 1458-01132-1
2007/04/08 2004 Lexell TYC 4955-00778-1
2007/04/10 2089 Cetacea 2UCAC 42753593
2007/04/10 226 Weringia TYC 5724-02237-1
2007/04/15 2988 Korhonen TYC 5703-00659-1
2007/04/15 2156 Kate TYC 6817-02312-1
2007/04/16 50 Virginia TYC 6185-00923-1
2007/05/12 114694 2003 FC99 HIP 106565
2007/05/15 10632 1998 CV1 TYC 0297-00910-1
2007/05/15 82055 2000 TY40 TYC 1999-00179-1
2007/05/19 2089 Cetacea TYC 1966-00906-1
2007/05/22 9107 1997 AE4 TYC 0860-00792-1
It is necessary to send a report even if there has been no occultation from your place (negative observation). These negative observations can sometimes be of as great interest as positive ones : they can be decisive to determine the shape (see the case of Vaclav PRIBAN observation of the KREUSA event, in this Info), refine the orbit of the asteroid or discover un unknown satellite !
Please DON’T FORGET to use the IAU format YYMMDD for the date of your reports. Clear skies for all.
G. REGHEERE gillesregheere@yahoo.fr
96 rue de Mercantour
78310 Maurepas - FRANCE