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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