16318-0701 STF 3105 (HD 148931)
16h 31m 47.95s -07° 01' 23.9" P.A. 182.00 sep 0.6 mag 7.68,9.25 Sp A0V dist. 163.4 pc (533.01 l.y.)
| Coord 2000 |
16318-0701 |
|
Discov num |
STF3105 |
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Comp |
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Coord arcsec 2000 |
16 31 47.95 -07 01 23.9 |
|
| Date first |
1830 |
|
Date last |
2016 |
|
Obs |
134 |
|
| Pa first |
59 |
|
Pa last |
181.8 |
|
P.A. Now (θ) |
181.8° |
|
| Sep first |
0.4 |
|
Sep last |
0.557 |
|
Sep. Now (ρ) |
0.557" |
|
| Mag pri |
7.68 |
|
Mag sec |
9.25 |
|
delta mag (ΔM) |
1.57 |
|
Spectral class |
A0V (white) |
|
| Pri motion ra |
-011 |
|
Sec motion ra |
-011 |
|
| Pri motion dec |
-017 |
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Sec motion dec |
-017 |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 148931 |
|
Constellation |
Ophiuchus |
|
SAO |
141223 |
|
HIP |
80954 |
|
| Tycho2 |
5060-00251-1 |
|
Gaia DR2 |
4351421518665318400 |
|
HD |
148931 |
|
GC |
22219 |
|
| ADS |
10092 |
|
BD |
BD-06 4446 |
|
Distance |
163.4 |
|
Distance ly |
533.01 |
|
ORBITAL ELEMENTS
| Period (P) | 540y | |
Periastron (T) | 1955y | |
Semi-major axis (a) | 0.635a | |
| Eccentricity (e) | 0.65 | |
Inclination (i) | 127° | |
Longitude of periastron (ω) | 87° | |
| Node (Ω) | 17° | |
Notes | | |
Reference | Hei1996c | |
| Equinox | 2000 | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
188.8 |
0.441 |
| 2001 |
188.2 |
0.446 |
| 2002 |
187.6 |
0.451 |
| 2003 |
187.0 |
0.455 |
| 2004 |
186.4 |
0.460 |
| 2005 |
185.8 |
0.464 |
| 2006 |
185.3 |
0.468 |
| 2007 |
184.7 |
0.472 |
| 2008 |
184.2 |
0.476 |
| 2009 |
183.6 |
0.480 |
| 2010 |
183.1 |
0.484 |
| 2011 |
182.6 |
0.488 |
| 2012 |
182.1 |
0.492 |
| 2013 |
181.6 |
0.495 |
| 2014 |
181.1 |
0.499 |
| 2015 |
180.6 |
0.502 |
| 2016 |
180.1 |
0.505 |
| 2017 |
179.6 |
0.509 |
| 2018 |
179.1 |
0.512 |
| 2019 |
178.7 |
0.515 |
| 2020 |
178.2 |
0.518 |
| 2021 |
177.8 |
0.521 |
| 2022 |
177.3 |
0.524 |
| 2023 |
176.9 |
0.527 |
| 2024 |
176.4 |
0.530 |
| 2025 |
176.0 |
0.532 |
| 2026 |
175.5 |
0.535 |
| 2027 |
175.1 |
0.538 |
| 2028 |
174.7 |
0.540 |
| 2029 |
174.3 |
0.543 |
| 2030 |
173.9 |
0.545 |
|
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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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