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Doubles in session


Current system
13571-2731
I 234
HD 121632


Nearby doubles
9' : 13569-2740
SEE 193

29' : 13583-2756
BRT3005

50' : 14004-2708
LDS4424

54' : 13558-2820
B 259

57' : 13574-2828
NSN 412

60' : 14006-2654
B 261

64' : 13598-2639
HDS1963

77' : 13537-2631
KPP2492

77' : 13513-2734
LDS 855

81' : 13511-2725
B 256

82' : 14003-2840
RST1760

92' : 13503-2742
UC 2624

93' : 13502-2731
RST1751AB

94' : 13554-2601
RST2880

95' : 13505-2657
KPP1357

98' : 14026-2834
LDS5805

98' : 13550-2905
RST1755

100' : 14002-2903
UC 2656

101' : 14010-2857
RST1761

101' : 14016-2853
LDS 469

102' : 13560-2911
UC 2639

104' : 13499-2811
RSS 20

109' : 14045-2817
UC 2673

113' : 14004-2916
HJ 4639

116' : 14048-2825
BRT3007AB

116' : 14044-2836
B 264



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

13571-2731 I 234 (HD 121632)

 
 
13h 57m 06.59s -27° 31' 25.8" P.A. 206.00 sep 0.6 mag 8.61,9.67 Sp G8/K0V dist. 140.06 pc (456.88 l.y.)
 
 
Coord 2000 13571-2731 Discov num I   234 Comp Coord arcsec 2000 13 57 06.59 -27 31 25.8
Date first 1897 Date last 2022 Obs 28
Pa first 315 Pa last 206.4 P.A. Now (θ) 214.9°
Sep first 0.8 Sep last 0.564 Sep. Now (ρ) 0.575"
Mag pri 8.61 Mag sec 9.67 delta mag (ΔM) 1.06 Spectral class G8/K0V (yellow)
Pri motion ra -154 Sec motion ra -154
Pri motion dec -062 Sec motion dec -062
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 121632 Constellation Hydra SAO 182111 HIP 68148
Tycho2 6724-00569-1 Gaia DR2 6177381028669665920 HD 121632 ADS 9064
CD CD-2610004 CP CP-26 5113 Distance 140.06 Distance ly 456.88
 
 
ORBITAL ELEMENTS
 
 
Period (P)200.72y± 17.44 Periastron (T)2057.91y± 10.04 Semi-major axis (a)0.773a± 0.043
Eccentricity (e)0.725± 0.023 Inclination (i)117.3°± 1.3 Longitude of periastron (ω)83.9°± 1.1
Node (Ω)165.9°± 8.6 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 228.8 0.582
2001 227.8 0.582
2002 226.8 0.582
2003 225.8 0.581
2004 224.8 0.581
2005 223.8 0.581
2006 222.8 0.580
2007 221.8 0.580
2008 220.8 0.580
2009 219.8 0.579
2010 218.7 0.579
2011 217.7 0.578
2012 216.7 0.578
2013 215.7 0.577
2014 214.7 0.577
2015 213.7 0.576
2016 212.7 0.575
2017 211.6 0.574
2018 210.6 0.573
2019 209.6 0.572
2020 208.5 0.571
2021 207.5 0.570
2022 206.4 0.569
2023 205.4 0.567
2024 204.3 0.565
2025 203.3 0.563
2026 202.2 0.561
2027 201.1 0.559
2028 200.0 0.557
2029 198.9 0.554
2030 197.8 0.551
2031 196.7 0.547
2032 195.6 0.544
2033 194.4 0.540
2034 193.2 0.535
2035 192.1 0.530
2036 190.8 0.525
2037 189.6 0.519
2038 188.3 0.513
2039 187.0 0.506
2040 185.7 0.498
2041 184.3 0.489
2042 182.8 0.480
2043 181.3 0.470
2044 179.8 0.458
2045 178.1 0.445
2046 176.3 0.431
2047 174.5 0.415
2048 172.4 0.398
2049 170.2 0.378
2050 167.6 0.356


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds13571-2731a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic