18055+0230 STF2272AB (70 Oph)

 
 
18h 05m 27.37s +02 29' 59.3" P.A. 120.90 sep 6.7 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
2019
Obs
1725
Pa first
82
Pa last
122
P.A. Now (θ)
120.9°
Sep first
7.0
Sep last
6.6
Sep. Now (ρ)
6.67"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 70 Oph 123107 18055+0230 STF2272 AB 1777 2019 1725 121 6.7 4.22 6.17 1.95 Y <===
Show 123107 18055+0230 STF2272 AC 1878 2013 58 326 93.1 4.22 12.05 7.83
Show 123107 18055+0230 STF2272 AD 1905 2009 20 315 129.3 4.22 14.36 10.14
Show 123107 18055+0230 TNN 9 AE 2004 2004 1 231 9.4 1.79 13.01 11.22
Show 123107 18055+0230 TNN 9 AF 2004 2004 1 196 11.5 1.79 13.82 12.03
Show 123107 18055+0230 STF2272 AR 1905 2012 27 26 164.8 4.22 12.87 8.65
Show 123107 18055+0230 STF2272 AS 1878 2009 37 10 202.6 4.22 12.45 8.23
Show 123107 18055+0230 STF2272 AT 1905 2013 28 45 128.4 4.22 12.25 8.03
Show 123107 18055+0230 STF2272 AU 1905 2009 17 337 255.5 4.22 13.79 9.57
Show 123107 18055+0230 STF2272 AV 1886 2013 41 276 144.5 4.22 10.83 6.61
Show 123107 18055+0230 STF2272 AY 1924 2009 4 357 250.5 4.22 14.73 10.51
Show 123107 18055+0230 STF2272 AZ 2000 2000 1 163 68.3 4.22 16.04 11.82
Show 123107 18055+0230 STF2272 BC 1899 2000 5 322 81.2 6.17 12.05 5.88
Show 123107 18055+0230 STF2272 BD 1900 2000 3 311 120.0 6.17 14.36 8.19
Show 123107 18055+0230 STF2272 BR 1908 2000 23 29 154.3 6.17 12.87 6.70
Show 123107 18055+0230 STF2272 BZ 1900 2000 3 163 70.2 6.17 16.04 9.87
Show 18055+0230 STF2272 VT 1905 2015 28 72 247.5 10.83 12.25 1.42
Show 18055+0230 STF2272 VW 1906 2015 11 270 180.6 10.83 11.77 0.94
Show 18055+0230 STF2272 VX 1906 2015 10 253 17.5 10.83 13.88 3.05
15-fold system
15 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
121.8
Precise sep
6.645
Name
70 Oph
Other name
p Oph
Var name
V2391 Oph
Constellation
Ophiuchus
SAO
123107
HIP
88601
Tycho2
0434-05213-1
Gaia DR2
89937892096
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
last precise pa
121.8
last precise sep
6.645
 
 
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 Note Grade1(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 3.727 148.4
2001 3.974 145.8
2002 4.211 143.6
2003 4.437 141.6
2004 4.652 139.8
2005 4.856 138.1
2006 5.049 136.6
2007 5.231 135.2
2008 5.402 133.8
2009 5.562 132.6
2010 5.711 131.4
2011 5.849 130.3
2012 5.977 129.2
2013 6.094 128.2
2014 6.201 127.2
2015 6.298 126.2
2016 6.385 125.3
2017 6.462 124.4
2018 6.529 123.5
2019 6.587 122.6
2020 6.635 121.8
2021 6.674 120.9
2022 6.704 120.1
2023 6.724 119.2
2024 6.736 118.4
2025 6.738 117.6
2026 6.732 116.7
2027 6.717 115.9
2028 6.693 115.1
2029 6.661 114.2
2030 6.620 113.4

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






wds18055%2B0230d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18055+0230 STF2272 AB 2007 1681 134 5.4 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2008 1685 133 5.7 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2009 1690 132 5.7 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2010 1699 131 5.8 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2012 1713 128 6.2 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2013 1730 130 5.9 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2014 1697 128 6.2 4.22 6.17 K0V K4V NODP 180527.37+022959.3
18055+0230 STF2272 AB 2015 1698 126 6.6 4.22 6.17 K0V+K4V NO P 180527.37+022959.3
18055+0230 STF2272 AB 2016 1706 124 6.6 4.22 6.17 K0V+K4V NO P 180527.37+022959.3
18055+0230 STF2272 AB 2017 1709 124 6.5 4.22 6.17 K0V+K4V NO P 180527.37+022959.3
18055+0230 STF2272 AB 2018 1713 121 6.8 4.22 6.17 K0V+K4V NO P 180527.37+022959.3
18055+0230 STF2272 AB 2019 1721 122 6.6 4.22 6.17 K0V+K4V NO P 180527.37+022959.3

If you need more information about this double, apply for a data request form to the WDS.