18055+0230 STF2272AB (70 Oph)

 
 
18h 05m 27.37s +02 29' 59.3" P.A. 122.6 sep 6.56 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
2018
Obs
1713
Pa first
82
Pa last
121
P.A. Now (θ)
122.6°
Sep first
7.0
Sep last
6.8
Sep. Now (ρ)
6.56"
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 2018 1713 123 6.6 4.22 6.17 1.95 Y <===
Show 18055+0230 STF2272 AC 1878 2013 58 326 93.1 4.22 12.05 7.83
Show 18055+0230 STF2272 AD 1905 2009 20 315 129.3 4.22 14.36 10.14
Show 18055+0230 TNN 9 AE 2004 2004 1 231 9.4 1.79 13.01 11.22
Show 18055+0230 TNN 9 AF 2004 2004 1 196 11.5 1.79 13.82 12.03
Show 18055+0230 STF2272 AR 1905 2012 27 26 164.8 4.22 12.87 8.65
Show 18055+0230 STF2272 AS 1878 2009 37 10 202.6 4.22 12.45 8.23
Show 18055+0230 STF2272 AT 1905 2013 28 45 128.4 4.22 12.25 8.03
Show 18055+0230 STF2272 AU 1905 2009 17 337 255.5 4.22 13.79 9.57
Show 18055+0230 STF2272 AV 1886 2013 41 276 144.5 4.22 10.83 6.61
Show 18055+0230 STF2272 AY 1924 2009 4 357 250.5 4.22 14.73 10.51
Show 18055+0230 STF2272 AZ 2000 2000 1 163 68.3 4.22 16.04 11.82
Show 18055+0230 STF2272 BC 1899 2000 5 322 81.2 6.17 12.05 5.88
Show 18055+0230 STF2272 BD 1900 2000 3 311 120.0 6.17 14.36 8.19
Show 18055+0230 STF2272 BR 1908 2000 23 29 154.3 6.17 12.87 6.70
Show 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
121.3
Precise sep
6.81
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
121.3
last precise sep
6.81
 
 
ORBITAL ELEMENTS
 
 
Period (P)32279d (88.38y)± 15 Periastron (T)45809d (1984.297y)± 14 Semi-major axis (a)4.526a± 0.007
Eccentricity (e)0.5005± 0.0006 Inclination (i)121.1°± 0.1 Longitude of periastron (ω)193.4°± 0.3
Node (Ω)121.7°± 0.1 Note Grade1(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 3.709 148.5
2001 3.955 145.9
2002 4.191 143.7
2003 4.416 141.7
2004 4.630 139.8
2005 4.833 138.2
2006 5.026 136.6
2007 5.207 135.2
2008 5.377 133.9
2009 5.536 132.6
2010 5.684 131.4
2011 5.822 130.3
2012 5.949 129.2
2013 6.066 128.2
2014 6.173 127.2
2015 6.270 126.2
2016 6.356 125.3
2017 6.434 124.4
2018 6.501 123.5
2019 6.559 122.6
2020 6.607 121.8
2021 6.647 120.9
2022 6.677 120.1
2023 6.698 119.2
2024 6.710 118.4
2025 6.713 117.6
2026 6.708 116.8
2027 6.693 115.9
2028 6.670 115.1
2029 6.639 114.3
2030 6.599 113.4

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






wds18055%2B0230a.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

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