18055+0230 STF 2272 AB (70 Oph)

 
 
18h 05m 27.37s +02 29' 59.3" P.A. 121.00 sep 6.9 mag 4.22,6.17 Sp K0V+K4V dist. 5.08 pc (16.57 l.y.)
 
 
Coord 2000 18055+0230 Discov num STF2272 Comp AB Coord arcsec 2000 18 05 27.37 +02 29 59.3
Date first 1777 Date last 2021 Obs 1735
Pa first 82 Pa last 120.7 P.A. Now (θ) 119.2°
Sep first 7.0 Sep last 6.86 Sep. Now (ρ) 6.724"
Mag pri 4.22 Mag sec 6.17 delta mag (ΔM) 1.95 Spectral class K0V+K4V (yellow-orange/yellow-orange)
Pri motion ra +028 Sec motion ra +044
Pri motion dec -109 Sec motion dec -125
Notes N O P (See Notes, Orbital solution, 100-year proper motion)
rPM=0.171 (< 0.3, Physical double)
This double is physical.
 
 
18055+0230 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 70 Oph 123107 18 05 27 +02 29 59 STF 2272 AB 2021 1735 121 6.9 4.22 6.17 1.95 Y <===
Show 123107 18 05 27 +02 29 59 STF 2272 AC 2013 58 326 93.1 4.22 12.05 7.83
Show 123107 18 05 27 +02 29 59 STF 2272 AD 2009 20 315 129.3 4.22 14.36 10.14
Show 123107 18 05 27 +02 29 59 TNN 9 AE 2004 1 231 9.4 4.22
Show 123107 18 05 27 +02 29 59 TNN 9 AF 2004 1 196 11.5 4.22
Show 123107 18 05 27 +02 29 59 STF 2272 AR 2012 27 26 164.8 4.22 12.87 8.65
Show 123107 18 05 27 +02 29 59 STF 2272 AS 2009 37 10 202.6 4.22 12.45 8.23
Show 123107 18 05 27 +02 29 59 STF 2272 AT 2013 28 45 128.4 4.22 12.25 8.03
Show 123107 18 05 27 +02 29 59 STF 2272 AU 2009 17 337 255.5 4.22 13.79 9.57
Show 123107 18 05 27 +02 29 59 STF 2272 AV 2013 41 276 144.5 4.22 10.83 6.61
Show 123107 18 05 27 +02 29 59 STF 2272 AY 2009 4 357 250.5 4.22 14.73 10.51
Show 123107 18 05 27 +02 29 59 STF 2272 AZ 2000 1 163 68.3 4.22 16.04 11.82
Show 18 05 27 +02 29 56 STF 2272 BC 2000 5 322 81.2 6.17 12.05 5.88
Show 18 05 27 +02 29 56 STF 2272 BD 2000 3 311 120.0 6.17 14.36 8.19
Show 18 05 27 +02 29 56 STF 2272 BR 2000 23 29 154.3 6.17 12.87 6.70
Show 18 05 27 +02 29 56 STF 2272 BZ 2000 3 163 70.2 6.17 16.04 9.87
Show 18 05 18 +02 30 00 STF 2272 VT 2015 28 72 247.5 10.83 12.25 1.42
Show 18 05 18 +02 30 00 STF 2272 VW 2015 11 270 180.6 10.83 11.77 0.94
Show 18 05 18 +02 30 00 STF 2272 VX 2015 10 253 17.5 10.83 13.88 3.05
15-fold system
15 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 70 Oph Var name V2391 Oph Constellation Ophiuchus SAO 123107
HIP 88601 Tycho2 0434-05213-1 Gaia DR2 4468557989937892096 HD 165341
HR 6752 GC 24641 ADS 11046 GL Gl 702A
BD BD+02 3482 Flamsteed 70 Ophiuchi Flamsteed name 70 Oph Distance 5.08
Distance ly 16.57
 
 
ORBITAL ELEMENTS
 
 
Period (P)88.3983y± 0.0384 Periastron (T)1895.8216y± 0.0525 Semi-major axis (a)4.55038a± 0.00625
Eccentricity (e)0.49803± 0.00052 Inclination (i)120.892°± 0.089 Longitude of periastron (ω)193.376°± 0.252
Node (Ω)121.692°± 0.126 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 148.4 3.727
2001 145.8 3.974
2002 143.6 4.211
2003 141.6 4.437
2004 139.8 4.652
2005 138.1 4.856
2006 136.6 5.049
2007 135.2 5.231
2008 133.8 5.402
2009 132.6 5.562
2010 131.4 5.711
2011 130.3 5.849
2012 129.2 5.977
2013 128.2 6.094
2014 127.2 6.201
2015 126.2 6.298
2016 125.3 6.385
2017 124.4 6.462
2018 123.5 6.529
2019 122.6 6.587
2020 121.8 6.635
2021 120.9 6.674
2022 120.1 6.704
2023 119.2 6.724
2024 118.4 6.736
2025 117.6 6.738
2026 116.7 6.732
2027 115.9 6.717
2028 115.1 6.693
2029 114.2 6.661
2030 113.4 6.620


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds18055%2B0230d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic