18096+0400 STF 2281 AB (73 Oph)
18h 09m 33.86s +03° 59' 35.8" P.A. 282.00 sep 0.8 mag 5.97,7.52 Sp F2V dist. 54.79 pc (178.72 l.y.)
| Coord 2000 |
18096+0400 |
|
Discov num |
STF2281 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 09 33.86 +03 59 35.8 |
|
| Date first |
1783 |
|
Date last |
2021 |
|
Obs |
429 |
|
| Pa first |
267 |
|
Pa last |
281.8 |
|
P.A. Now (θ) |
279.2° |
|
| Sep first |
0.9 |
|
Sep last |
0.791 |
|
Sep. Now (ρ) |
0.803" |
|
| Mag pri |
5.97 |
|
Mag sec |
7.52 |
|
delta mag (ΔM) |
1.55 |
|
Spectral class |
F2V (yellow-white) |
|
| Pri motion ra |
+046 |
|
Sec motion ra |
+046 |
|
| Pri motion dec |
-007 |
|
Sec motion dec |
-007 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18096+0400 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
73 Oph |
123187 |
18 09 34 +03 59 36 |
STF 2281 AB |
2021 |
429 |
282 |
0.8 |
5.97 |
7.52 |
1.55 |
Y |
<=== |
| Show |
|
123187 |
18 09 34 +03 59 36 |
STF 2281 AB,C |
2002 |
5 |
194 |
68.0 |
5.77 |
12.60 |
6.83 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
73 Oph |
|
Var name |
NSV10287 Oph |
|
Constellation |
Ophiuchus |
|
SAO |
123187 |
|
| HIP |
88964 |
|
Tycho2 |
0439-01445-1 |
|
Gaia DR2 |
4470319819874781184 |
|
HD |
166233 |
|
| HR |
6795 |
|
GC |
24754 |
|
ADS |
11111 |
|
BD |
BD+03 3610 |
|
| Flamsteed |
73 Ophiuchi |
|
Flamsteed name |
73 Oph |
|
Distance |
54.79 |
|
Distance ly |
178.72 |
|
ORBITAL ELEMENTS
| Period (P) | 294y | |
Periastron (T) | 1912.8y | |
Semi-major axis (a) | 1.19a | |
| Eccentricity (e) | 0.61 | |
Inclination (i) | 103° | |
Longitude of periastron (ω) | 307° | |
| Node (Ω) | 71° | |
Notes | n | |
Reference | Sod1999 | |
| Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
296.2 |
0.520 |
| 2001 |
295.1 |
0.532 |
| 2002 |
294.0 |
0.544 |
| 2003 |
293.0 |
0.556 |
| 2004 |
292.0 |
0.568 |
| 2005 |
291.1 |
0.580 |
| 2006 |
290.2 |
0.592 |
| 2007 |
289.3 |
0.605 |
| 2008 |
288.5 |
0.617 |
| 2009 |
287.7 |
0.630 |
| 2010 |
287.0 |
0.642 |
| 2011 |
286.2 |
0.654 |
| 2012 |
285.5 |
0.667 |
| 2013 |
284.8 |
0.679 |
| 2014 |
284.2 |
0.692 |
| 2015 |
283.5 |
0.704 |
| 2016 |
282.9 |
0.717 |
| 2017 |
282.3 |
0.729 |
| 2018 |
281.8 |
0.742 |
| 2019 |
281.2 |
0.754 |
| 2020 |
280.7 |
0.766 |
| 2021 |
280.2 |
0.779 |
| 2022 |
279.7 |
0.791 |
| 2023 |
279.2 |
0.803 |
| 2024 |
278.7 |
0.816 |
| 2025 |
278.2 |
0.828 |
| 2026 |
277.8 |
0.840 |
| 2027 |
277.4 |
0.852 |
| 2028 |
276.9 |
0.864 |
| 2029 |
276.5 |
0.876 |
| 2030 |
276.1 |
0.888 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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