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Doubles in session


Current system
08421-5245
B 1624
HD 74497


Nearby doubles
17' : 08429-5231
SKF 88

18' : 08410-5232
TDS6034

18' : 08435-5258
SKF 194

27' : 08400-5303
HJ 4126

28' : 08391-5243
I 809

33' : 08390-5301
DAM1429AB

35' : 08415-5211
TDS6039

37' : 08387-5305
HUB 8AB

40' : 08464-5251
HU 1590

41' : 08458-5309
DAM1480

43' : 08388-5216
TDS6006

43' : 08403-5206
TDS6023

44' : 08463-5308
HU 1589

48' : 08436-5331
HDS1255

51' : 08407-5157
TDS6030

55' : 08459-5327
ELP 22

55' : 08364-5302
RST2570AB

62' : 08360-5312
TDS5971

66' : 08375-5336
HJ 4123AB

69' : 08401-5351
FIN 394

69' : 08472-5155
RST 352

69' : 08423-5354
RSS 171

76' : 08360-5337
LPO 70

77' : 08436-5130
KPP 674

79' : 08459-5135
RST 351

81' : 08332-5243
TOI1043



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Neglected List I
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

08421-5245 B 1624 (HD 74497)

 
 
08h 42m 06.65s -52° 45' 23.3" P.A. 257.00 sep 0.4 mag 8.22,9.62 Sp G3V dist. 49.88 pc (162.71 l.y.)
 
 
Coord 2000 08421-5245 Discov num B  1624 Comp Coord arcsec 2000 08 42 06.65 -52 45 23.3
Date first 1929 Date last 2020 Obs 42
Pa first 118 Pa last 256.6 P.A. Now (θ) 261.6°
Sep first 0.2 Sep last 0.448 Sep. Now (ρ) 0.528"
Mag pri 8.22 Mag sec 9.62 delta mag (ΔM) 1.4 Spectral class G3V (yellow)
Pri motion ra -028 Sec motion ra
Pri motion dec +030 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 74497 Constellation Vela SAO 236196 HIP 42695
Tycho2 8569-01130-1 Gaia DR2 5318575448532526848 HD 74497 CD CD-52 2498
CP CP-52 1599 Distance 49.88 Distance ly 162.71
 
 
ORBITAL ELEMENTS
 
 
Period (P)74.05y± 0.43 Periastron (T)1995.69y± 0.31 Semi-major axis (a)0.474a± 0.002
Eccentricity (e)0.24± 0.003 Inclination (i)71.4°± 0.2 Longitude of periastron (ω)0.1°± 2.1
Node (Ω)89.7°± 0.2 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 102.1 0.315
2001 105.7 0.293
2002 110.0 0.269
2003 115.2 0.243
2004 121.7 0.216
2005 129.9 0.190
2006 140.5 0.168
2007 154.0 0.151
2008 170.0 0.142
2009 186.6 0.145
2010 201.6 0.157
2011 213.8 0.177
2012 223.3 0.202
2013 230.6 0.230
2014 236.2 0.260
2015 240.7 0.290
2016 244.4 0.319
2017 247.4 0.348
2018 250.0 0.376
2019 252.3 0.402
2020 254.2 0.427
2021 256.0 0.451
2022 257.6 0.473
2023 259.0 0.493
2024 260.4 0.511
2025 261.6 0.528
2026 262.8 0.542
2027 263.9 0.555
2028 265.0 0.565
2029 266.0 0.574
2030 267.1 0.580
2031 268.0 0.585
2032 269.0 0.587
2033 270.0 0.588
2034 271.0 0.586
2035 272.0 0.582
2036 273.0 0.577
2037 274.0 0.569
2038 275.1 0.559
2039 276.2 0.547
2040 277.3 0.534
2041 278.6 0.518
2042 279.9 0.500
2043 281.3 0.481
2044 282.8 0.460
2045 284.5 0.437
2046 286.4 0.412
2047 288.5 0.386
2048 290.9 0.359
2049 293.8 0.330
2050 297.2 0.301


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds08421-5245a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic