Equileus (le Petit Cheval)
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 2737 AB Epsil 20 59 04.5 +04 17 37 6.0 6.3 0.7" 285° 2000 Orb[ 1] F6IV
STF 2737 AB-C 20 59 04.5 +04 17 37 6.0 7.1 10.4" 67° 2002
STF 2737 BC 20 59 04.5 +04 17 37 6.3 7.1 11.2" 69° 1982
KNT 5 AB Gamma 21 10 20.5 +10 07 54 4.7 8.7 1.5" 264° 1994 [ 2] A9V
STF A 54 AD 21 10 20.5 +10 07 54 4.7 6.1 337.7" 152° 2001
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[ 1] Epsilon Equ. P = 101yr., a = 0.66", motion retrograde
in a highly-inclined orbit.
One component is a spectroscopic binary, and C is
physical, so that the system is quadruple.
[ 2] Gamma Equ. A is an Alpha CVn-type variable. There
apparently is a long-period spectroscopic binary
present.
ÉTOILES VARIABLES
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Nom AD (2000) DE Type Max Min T (Jul) P (jours) F Spectre
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S 20 57.21 +05 04.8 EA/SD 8.0 10.08 v 2442596.74348 3.4360969 13 *B9V+F9III-IV
R 21 13.19 +12 48.1 M 8.7 15.0 v 2442921. 260.76 44 M3e-M4e
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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 7015 21 5.6 +11 25 GSbc 12.5 13.3 1.9x1.6' 5070 km/s
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