Corona Borealis (la Couronne Boréale)
Le catalogue
ÉTOILES DOUBLES
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Désignation AD (2000.0) DE m1 m2 Écart PA Date Note Spectre
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STF 1937 AB Êta 15 23 12.2 +30 17 18 5.6 5.9 0.6" 82° 2002 Orb[ 1] G0V G3V
COU 610 Thêta 15 32 55.8 +31 21 33 4.3 6.3 1.0" 196° 1999 [ 2] B6Vnne
STF 1965 Dzê2-1 15 39 22.7 +36 38 09 5.0 5.9 6.4" 306° 2002 [ 3] B7V B9V
STF 1967 Gamma 15 42 44.6 +26 17 44 4.0 5.6 0.7" 115° 2000 Orb[ 4] B9IV+A3V
STT 304 AB 16 00 54.9 +39 10 39 6.8 10.6 10.7" 173° 1998 A0
STT 305 AB 16 11 39.6 +33 20 34 6.4 10.2 5.6" 263° 1991 K2III
STF 2022 16 12 45.5 +26 40 14 6.5 10.0 2.3" 151° 1998 F2V
STF 2032 AB Sigma 16 14 40.9 +33 51 31 5.6 6.5 7.1" 238° 2002 Orb[ 5] G0V G1V
SHJ 223 AB Upsil. 16 16 44.8 +29 09 01 5.8 11.7 53.9" 25° 1962 [ 6] A3V
STF A 29 AB Nu 1-2 16 22 21.4 +33 47 57 5.4 5.6 360.8" 164° 2001 [ 7] M2IIIab
H 5 38 16 22 56.5 +32 19 59 6.4 9.8 31.9" 17° 1995 [ 8] A4Vn
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[ 1] Eta CrB. AB: P = 41.6yr., a = 0.91", motion direct.
[ 2] Theta CrB. Variable.
[ 3] Zeta (2) CrB. A is a spectroscopic triple, with
periods of 1.72 and 251d.
The six-second companion is Zeta (1) CrB, with
common proper motion.
[ 4] Gamma CrB. P = 93yr., a = 0.73", motion retrograde,
highly-inclined orbit. A is a Delta Scuti-type
variable.
Measure of 1989.388 made by MAPPIT. This measure had a
identification error, position error, or misprint in
publication, which has been corrected.
[ 5] Sigma CrB. P = 1000yr., a = 6.6", motion direct. A is
a Delta Scuti-type variable, TZ CrB, and double-lined
spectroscopic binary, P = 1.14d. It exhibits atmo-
spheric and coronal activity, and radio flares.
There is a distant, 633" physical companion,
L 1490-24, mag. 12.31.
[ 6] Upsilon CrB. Possible spectroscopic binary.
[ 7] AB: Nu (1) CrB.
Aa: H N 81.
Bb: H VI 18. Nu (1) and Nu (2) CrB.
[ 8] H V 38. Proper motion of B -010 -032.
ÉTOILES VARIABLES
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Nom AD (2000) DE Type Max Min T (Jul) P (jours) F Spectre
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RX 15 17.83 +29 39.9 cst: 10.2 11.8 p A-F
U 15 18.19 +31 38.8 EA/SD 7.66 8.79 V 2416747.9718 3.45220133 14 *B6V+F8III-IV
S 15 21.41 +31 22.1 M 5.8 14.1 v 2444604. 360.26 35 M6e-M8e
TV 15 22.36 +26 52.6 RRab 10.6 12.2 p 2431618.537 0.5846145 15 A8
R 15 48.58 +28 09.4 RCB 5.71 14.8 V C0,0(F8pep)
X 15 48.89 +36 14.9 M 8.5 14.2 v 2443719. 241.17 46 M5e-M7e
V 15 49.52 +39 34.3 M 6.9 12.6 v 2443763. 357.63 41 C6,2e(N2e)
Z 15 56.14 +29 14.2 M 8.8 15.5 v 2442514. 250.68 42 M4e-M5e
RS 15 58.51 +36 01.3 SRa 8.7 11.6 p 2434825. 332.2 47 M7
T 15 59.51 +25 55.2 Nr 1946 2.0 10.8 v 2431860. 9000 M3III+pec(nova)
W 16 15.40 +37 47.8 M 7.8 14.3 v 2444192. 238.40 45 M2e-M5e
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CIEL PROFOND
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Nom AD (2000) DE Type V B Dim. Dist. Notes
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NGC 5958 15 34.8 +28 39 GS? 13.4 1.0x1.0' 2110 km/s
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