23167+1937 HDS 3316
23h 16m 39.72s +19° 37' 17.0" P.A. 8.00 sep 0.1 mag 11.93,12.08 Sp M1+M2 dist. 30.73 pc (100.24 l.y.)
| Coord 2000 |
23167+1937 |
|
Discov num |
HDS3316 |
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Comp |
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Coord arcsec 2000 |
23 16 39.72 +19 37 17.0 |
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| Date first |
1991 |
|
Date last |
2020 |
|
Obs |
41 |
|
| Pa first |
210 |
|
Pa last |
7.8 |
|
P.A. Now (θ) |
306.5° |
|
| Sep first |
0.3 |
|
Sep last |
0.129 |
|
Sep. Now (ρ) |
0.105" |
|
| Mag pri |
11.93 |
|
Mag sec |
12.08 |
|
delta mag (ΔM) |
0.15 |
|
Spectral class |
M1+M2 (red/red) |
|
| Pri motion ra |
-179 |
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Sec motion ra |
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| Pri motion dec |
-181 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Pegasus |
|
HIP |
114922 |
|
Tycho2 |
1715-00452-3 |
|
Gaia DR2 |
2825264534241938560 |
|
| GL |
Gl 893.4 |
|
Distance |
30.73 |
|
Distance ly |
100.24 |
|
ORBITAL ELEMENTS
| Period (P) | 19.29y | ± 0.02 |
Periastron (T) | 2019.03y | ± 0.01 |
Semi-major axis (a) | 217.2m | ± 0.7 |
| Eccentricity (e) | 0.444 | ± 0.002 |
Inclination (i) | 116.6° | ± 0.2 |
Longitude of periastron (ω) | 142.1° | ± 0.3 |
| Node (Ω) | 208.6° | ± 0.2 |
Notes | n | |
Reference | Mit2021 | |
| Equinox | | |
Last observation | 2020 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
39.8 |
0.114 |
| 2001 |
18.0 |
0.134 |
| 2002 |
357.0 |
0.122 |
| 2003 |
329.5 |
0.106 |
| 2004 |
297.5 |
0.108 |
| 2005 |
271.7 |
0.130 |
| 2006 |
254.9 |
0.162 |
| 2007 |
243.8 |
0.196 |
| 2008 |
236.0 |
0.228 |
| 2009 |
229.9 |
0.254 |
| 2010 |
224.8 |
0.273 |
| 2011 |
220.3 |
0.285 |
| 2012 |
216.0 |
0.287 |
| 2013 |
211.6 |
0.280 |
| 2014 |
206.8 |
0.260 |
| 2015 |
200.8 |
0.226 |
| 2016 |
192.1 |
0.177 |
| 2017 |
174.7 |
0.113 |
| 2018 |
116.6 |
0.061 |
| 2019 |
48.9 |
0.099 |
| 2020 |
23.7 |
0.133 |
| 2021 |
3.6 |
0.127 |
| 2022 |
338.3 |
0.110 |
| 2023 |
306.5 |
0.105 |
| 2024 |
278.2 |
0.122 |
| 2025 |
259.0 |
0.153 |
| 2026 |
246.6 |
0.187 |
| 2027 |
238.0 |
0.219 |
| 2028 |
231.5 |
0.247 |
| 2029 |
226.2 |
0.268 |
| 2030 |
221.5 |
0.282 |
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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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