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Doubles in session


Current system
15465+1957
COU 66


Nearby doubles
33' : 15485+2015
DBR 320

33' : 15450+1933
CBL 495

40' : 15482+1925
COU 193

48' : 15433+1954
HJ 2790

53' : 15468+1905
A 2077

60' : 15456+1859
SLW1135

68' : 15474+1851
COU 192AB

73' : 15416+1940
HU 580AB

75' : 15506+1909
SLW1142

78' : 15509+1911
A 2078

79' : 15428+1859
GWP2547

80' : 15521+2015
HJ 2794AB

87' : 15432+1846
LDS4587

89' : 15424+1852
GWP2546

90' : 15529+2000
HU 747

96' : 15503+2117
SHN 205

99' : 15532+1931
HJ 2796

104' : 15410+2105
GRV 910

108' : 15540+1936
COU 67

108' : 15501+1822
CVR 172

111' : 15419+1828
DRS 17AB

113' : 15388+1934
CVR 798

113' : 15440+1810
SHN 33

116' : 15405+1840
A 2076

122' : 15404+2123
HU 579

124' : 15398+2117
AG 197



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Binary Systems
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

15465+1957 COU 66

 
 
15h 46m 32.45s +19° 57' 14.4" P.A. 47.00 sep 0.4 mag 10.94,11.20 Sp K8 dist. 49.02 pc (159.9 l.y.)
 
 
Coord 2000 15465+1957 Discov num COU  66 Comp Coord arcsec 2000 15 46 32.45 +19 57 14.4
Date first 1965 Date last 2022 Obs 39
Pa first 164 Pa last 47.1 P.A. Now (θ) 67.4°
Sep first 0.9 Sep last 0.425 Sep. Now (ρ) 0.468"
Mag pri 10.94 Mag sec 11.20 delta mag (ΔM) 0.26 Spectral class K8 (yellow-orange)
Pri motion ra -163 Sec motion ra
Pri motion dec +143 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Serpens HIP 77269 Distance 49.02 Distance ly 159.9
 
 
ORBITAL ELEMENTS
 
 
Period (P)143.2y± 3.3 Periastron (T)2031.3y± 3.8 Semi-major axis (a)0.727a± 0.011
Eccentricity (e)0.497± 0.019 Inclination (i)147°± 0.4 Longitude of periastron (ω)25.5°± 4
Node (Ω)12°± 5.1 Notes ReferenceKsr2021
Equinox Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 122.4 0.706
2001 120.5 0.692
2002 118.4 0.678
2003 116.2 0.664
2004 114.0 0.650
2005 111.7 0.636
2006 109.2 0.622
2007 106.7 0.608
2008 104.0 0.594
2009 101.2 0.580
2010 98.2 0.566
2011 95.2 0.553
2012 91.9 0.540
2013 88.5 0.527
2014 84.9 0.514
2015 81.2 0.502
2016 77.3 0.490
2017 73.1 0.479
2018 68.8 0.468
2019 64.3 0.457
2020 59.6 0.448
2021 54.7 0.438
2022 49.5 0.429
2023 44.2 0.420
2024 38.6 0.412
2025 32.8 0.404
2026 26.7 0.396
2027 20.4 0.388
2028 13.9 0.380
2029 7.0 0.372
2030 359.9 0.365
2031 352.5 0.357
2032 344.8 0.351
2033 336.8 0.346
2034 328.7 0.343
2035 320.4 0.342
2036 312.2 0.344
2037 304.1 0.348
2038 296.3 0.356
2039 288.8 0.366
2040 281.8 0.379
2041 275.3 0.393
2042 269.3 0.410
2043 263.8 0.428
2044 258.8 0.448
2045 254.2 0.468
2046 250.0 0.489
2047 246.1 0.510
2048 242.5 0.531
2049 239.2 0.553
2050 236.2 0.574


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15465%2B1957b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic