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Doubles in session


Current system
17471+1742
STF 2215
HD 161833


Nearby doubles
17' : 17483+1740
BPM 700

21' : 17457+1743
STF2205

23' : 17484+1727
ARG 79

27' : 17487+1728
DAM 280

28' : 17453+1750
TDT 488

46' : 17440+1738
TOB 265

46' : 17503+1737
BPM 702

48' : 17438+1742
TOB 264

50' : 17476+1831
UC 3409

56' : 17433+1741
STH 4

56' : 17433+1751
BPM 696

56' : 17457+1650
A 2092

62' : 17477+1641
UC 3411

63' : 17513+1723
TDT 536

64' : 17429+1724
TOB 266

66' : 17439+1829
TDT 480

68' : 17510+1821
HDS2517

74' : 17489+1633
TDT 519

76' : 17524+1733
BPM 703

83' : 17524+1708
TDT 550

84' : 17428+1646
BPMA 51

84' : 17478+1619
HEI 254

86' : 17421+1707
LDS1001

87' : 17445+1900
STF2206

97' : 17530+1655
CRC 27AB

103' : 17537+1702
BPM 706



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.

17471+1742 STF 2215 (HD 161833)

 
 
17h 47m 08.05s +17° 41' 49.2" P.A. 245.00 sep 0.5 mag 6.02,6.89 Sp A1V dist. 143.06 pc (466.66 l.y.)
 
 
Coord 2000 17471+1742 Discov num STF2215 Comp Coord arcsec 2000 17 47 08.05 +17 41 49.2
Date first 1831 Date last 2022 Obs 227
Pa first 311 Pa last 245.4 P.A. Now (θ) 249.1°
Sep first 0.8 Sep last 0.48 Sep. Now (ρ) 0.411"
Mag pri 6.02 Mag sec 6.89 delta mag (ΔM) 0.87 Spectral class A1V (white)
Pri motion ra +012 Sec motion ra +012
Pri motion dec -013 Sec motion dec -013
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 161833 Constellation Hercules SAO 103106 HIP 87044
Tycho2 1556-01341-1 Gaia DR2 4550988750326340608 HD 161833 HR 6627
GC 24150 ADS 10795 BD BD+17 3334 Distance 143.06
Distance ly 466.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)1062.47y± 12.7 Periastron (T)2066.49y± 11.67 Semi-major axis (a)0.838a± 0.006
Eccentricity (e)0.397± 0.004 Inclination (i)132.2°± 0.5 Longitude of periastron (ω)270.6°± 2.3
Node (Ω)105.5°± 1.5 Notesn ReferenceCve2006e
Equinox2000 Last observation2002 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 257.7 0.505
2001 257.1 0.502
2002 256.5 0.498
2003 255.9 0.495
2004 255.3 0.491
2005 254.7 0.488
2006 254.1 0.484
2007 253.4 0.481
2008 252.8 0.477
2009 252.1 0.473
2010 251.5 0.470
2011 250.8 0.466
2012 250.1 0.463
2013 249.4 0.459
2014 248.7 0.456
2015 248.0 0.452
2016 247.3 0.449
2017 246.6 0.445
2018 245.8 0.442
2019 245.1 0.439
2020 244.3 0.435
2021 243.5 0.432
2022 242.7 0.428
2023 241.9 0.425
2024 241.1 0.422
2025 240.3 0.419
2026 239.4 0.415
2027 238.6 0.412
2028 237.7 0.409
2029 236.8 0.406
2030 235.9 0.403
2031 235.0 0.400
2032 234.1 0.397
2033 233.2 0.394
2034 232.2 0.391
2035 231.2 0.388
2036 230.3 0.385
2037 229.3 0.382
2038 228.2 0.380
2039 227.2 0.377
2040 226.2 0.375
2041 225.1 0.372
2042 224.1 0.370
2043 223.0 0.367
2044 221.9 0.365
2045 220.8 0.363
2046 219.7 0.361
2047 218.5 0.359
2048 217.4 0.357
2049 216.2 0.355
2050 215.1 0.353


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds17471%2B1742b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic