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Doubles in session


Current system
18044+0337
A 2257
HD 165110


Nearby doubles
8' : 18044+0329
STF2266AB

10' : 18048+0332
J 460

23' : 18057+0326
BAL2472

27' : 18049+0311
BAL2471

30' : 18026+0325
HDS2539

31' : 18055+0311
HEI 257

33' : 18065+0331
SLE 84

36' : 18026+0400
SLE 83

39' : 18017+0335
SLE 86

40' : 18046+0258
BAL1949

43' : 18015+0331
BU 1202AB

45' : 18014+0346
BAL2466

46' : 18015+0324
BAL2467

49' : 18022+0302
A 2190

50' : 18012+0324
BAL2465

53' : 18014+0406
BAL2910

53' : 18076+0314
SLE 85

54' : 18077+0317
AG 216

54' : 18080+0337
ARY 2AB

56' : 18081+0343
BAL2474

59' : 18026+0429
LDS5859

61' : 18052+0238
BAL1950

62' : 18084+0325
BAL2475

64' : 18060+0434
STTA165AB

66' : 18056+0439
SKF2127

68' : 18034+0231
A 2191



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.

18044+0337 A 2257 (HD 165110)

 
 
18h 04m 22.03s +03° 36' 50.0" P.A. 36.00 sep 0.2 mag 9.80,10.00 Sp F5
 
 
Coord 2000 18044+0337 Discov num A  2257 Comp Coord arcsec 2000 18 04 22.03 +03 36 50.0
Date first 1910 Date last 2018 Obs 13
Pa first 163 Pa last 36.4 P.A. Now (θ) 36.4°
Sep first 0.2 Sep last 0.168 Sep. Now (ρ) 0.168"
Mag pri 9.80 Mag sec 10.00 delta mag (ΔM) 0.2 Spectral class F5 (yellow-white)
Pri motion ra +004 Sec motion ra
Pri motion dec +013 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 165110 Constellation Ophiuchus SAO 123087 Tycho2 0434-00384-1
Gaia DR2 4469450415421218816 HD 165110 ADS 11033
 
 
ORBITAL ELEMENTS
 
 
Period (P)333y± 20 Periastron (T)1988.73y± 0.06 Semi-major axis (a)0.324a± 0.015
Eccentricity (e)0.829± 0.006 Inclination (i)73.5°± 1 Longitude of periastron (ω)274.3°± 2
Node (Ω)13.6°± 1 Notesn ReferenceDoc2008a
Equinox2000 Last observation2005 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 20.8 0.129
2001 21.8 0.134
2002 22.8 0.138
2003 23.7 0.142
2004 24.6 0.146
2005 25.4 0.149
2006 26.2 0.152
2007 27.0 0.154
2008 27.7 0.157
2009 28.4 0.159
2010 29.1 0.161
2011 29.8 0.163
2012 30.5 0.165
2013 31.1 0.166
2014 31.8 0.168
2015 32.4 0.169
2016 33.0 0.171
2017 33.7 0.172
2018 34.3 0.173
2019 34.9 0.174
2020 35.5 0.175
2021 36.0 0.175
2022 36.6 0.176
2023 37.2 0.177
2024 37.8 0.177
2025 38.3 0.178
2026 38.9 0.179
2027 39.5 0.179
2028 40.0 0.179
2029 40.6 0.180
2030 41.2 0.180
2031 41.7 0.180
2032 42.3 0.180
2033 42.8 0.181
2034 43.4 0.181
2035 43.9 0.181
2036 44.5 0.181
2037 45.0 0.181
2038 45.6 0.181
2039 46.1 0.181
2040 46.7 0.181
2041 47.2 0.181
2042 47.8 0.181
2043 48.3 0.181
2044 48.9 0.181
2045 49.4 0.181
2046 50.0 0.180
2047 50.5 0.180
2048 51.1 0.180
2049 51.7 0.180
2050 52.2 0.180


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds18044%2B0337b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic