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Doubles in session


Current system
17349+1234
MCY 4
Rasalhague


Nearby doubles
26' : 17343+1210
UC 3371

28' : 17366+1220
UC 3376

31' : 17347+1304
HEI 549

37' : 17374+1233
BU 1121

38' : 17344+1310
STF2184AB

45' : 17326+1204
UC 3365

49' : 17325+1201
BPM 686

49' : 17354+1322
A 1879

55' : 17319+1305
GWP2721

55' : 17368+1147
BPM 689

55' : 17322+1156
ISO 4

56' : 17323+1313
OL 88

68' : 17386+1153
BRT1287AB

75' : 17366+1344
UC 3375

78' : 17400+1253
ROE 96

82' : 17325+1346
BPM 685

85' : 17407+1237
BPM 693

96' : 17317+1111
AG 354

97' : 17307+1120
GWP2717AB

99' : 17342+1411
UC 3370

109' : 17394+1107
TDT 453

111' : 17286+1333
NSN 60

112' : 17286+1132
BPM 682

113' : 17340+1042
LDS4754

119' : 17308+1052
LDS4747

120' : 17430+1215
HU 1283



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.

17349+1234 MCY 4 (Rasalhague)

 
 
17h 34m 56.06s +12° 33' 36.1" P.A. 248.00 sep 0.7 mag 2.10,5.00 Sp A5III dist. 14.9 pc (48.6 l.y.)
 
 
Coord 2000 17349+1234 Discov num MCY   4 Comp Coord arcsec 2000 17 34 56.06 +12 33 36.1
Date first 1982 Date last 2023 Obs 29
Pa first 243 Pa last 248.2 P.A. Now (θ) 243.7°
Sep first 0.8 Sep last 0.692 Sep. Now (ρ) 0.786"
Mag pri 2.10 Mag sec 5.00 delta mag (ΔM) 2.9 Spectral class A5III (white)
Pri motion ra +110 Sec motion ra
Pri motion dec -223 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Rasalhague Var name NSV9189 Oph Constellation Ophiuchus SAO 102932
HIP 86032 Tycho2 1000-02508-1 Gaia DR2 4493746564376278400 HD 159561
HR 6556 GC 23837 BD BD+12 3252 Bayer Alpha Ophiuchi
Bayer name Alp Oph Flamsteed 55 Ophiuchi Flamsteed name 55 Oph FK5 656
Distance 14.9 Distance ly 48.6 Bayer greek α Oph
 
 
ORBITAL ELEMENTS
 
 
Period (P)3139.72d (8.6y)± 0.28 Periastron (T)56028.22d (2012.276y)± 0.029 Semi-major axis (a)409.8m± 0.3
Eccentricity (e)0.93912± 0.00013 Inclination (i)130.679°± 0.067 Longitude of periastron (ω)170.21°± 0.23
Node (Ω)236.86°± 0.16 Notesn ReferenceCIA2021c
Equinox2000 Last observation2019 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 241.7 0.780
2001-01-01 238.9 0.720
2002-01-01 235.3 0.590
2003-01-01 228.1 0.349
2004-01-01 269.0 0.185
2005-01-01 253.6 0.494
2006-01-01 248.9 0.663
2007-01-01 245.8 0.756
2008-01-01 243.2 0.788
2009-01-01 240.6 0.764
2010-01-01 237.6 0.677
2011-01-01 233.2 0.510
2012-01-01 218.6 0.185
2013-01-01 259.1 0.337
2014-01-01 251.4 0.574
2015-01-01 247.6 0.709
2016-01-01 244.8 0.776
2017-01-01 242.2 0.785
2018-01-01 239.5 0.737
2019-01-01 236.1 0.621
2020-01-01 230.2 0.408
2021-01-01 287.6 0.085
2022-01-01 255.0 0.449
2023-01-01 249.6 0.637
2024-01-01 246.4 0.743
2025-01-01 243.7 0.786
2026-01-01 241.1 0.773
2027-01-01 238.3 0.699
2028-01-01 234.3 0.550
2029-01-01 224.6 0.272
2030-01-01 262.4 0.271
2031-01-01 252.4 0.538
2032-01-01 248.2 0.688
2033-01-01 245.3 0.767
2034-01-01 242.7 0.788
2035-01-01 240.1 0.751
2036-01-01 236.9 0.650
2037-01-01 231.8 0.460
2038-01-01 186.9 0.052
2039-01-01 256.7 0.399
2040-01-01 250.4 0.609
2041-01-01 246.9 0.728
2042-01-01 244.2 0.782
2043-01-01 241.7 0.780
2044-01-01 238.9 0.718
2045-01-01 235.2 0.586
2046-01-01 227.8 0.343
2047-01-01 268.1 0.193
2048-01-01 253.5 0.498
2049-01-01 248.9 0.666
2050-01-01 245.8 0.757


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds17349%2B1234c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic