21399+2737 HDS 3083
21h 39m 54.37s +27° 36' 43.3" P.A. 337.00 sep 0.2 mag 11.95,13.22 Sp M2+M4 dist. 24.43 pc (79.69 l.y.)
| Coord 2000 |
21399+2737 |
|
Discov num |
HDS3083 |
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Comp |
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Coord arcsec 2000 |
21 39 54.37 +27 36 43.3 |
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| Date first |
1991 |
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Date last |
2021 |
|
Obs |
24 |
|
| Pa first |
135 |
|
Pa last |
337.4 |
|
P.A. Now (θ) |
355.7° |
|
| Sep first |
0.2 |
|
Sep last |
0.193 |
|
Sep. Now (ρ) |
0.156" |
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| Mag pri |
11.95 |
|
Mag sec |
13.22 |
|
delta mag (ΔM) |
1.27 |
|
Spectral class |
M2+M4 (red/red) |
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| Pri motion ra |
+281 |
|
Sec motion ra |
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| Pri motion dec |
-230 |
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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 |
106972 |
|
GL |
NN 4210 |
|
Distance |
24.43 |
|
| Distance ly |
79.69 |
|
ORBITAL ELEMENTS
| Period (P) | 12.75y | ± 0.13 |
Periastron (T) | 2006.893y | ± 0.154 |
Semi-major axis (a) | 0.2169a | ± 0.0026 |
| Eccentricity (e) | 0.294 | ± 0.013 |
Inclination (i) | 69.4° | ± 0.6 |
Longitude of periastron (ω) | 108.3° | ± 1.6 |
| Node (Ω) | 149.8° | ± 0.6 |
Notes | n | |
Reference | Bag2010 | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
86.2 |
0.108 |
| 2001 |
114.1 |
0.151 |
| 2002 |
129.0 |
0.197 |
| 2003 |
138.9 |
0.225 |
| 2004 |
147.5 |
0.225 |
| 2005 |
158.0 |
0.182 |
| 2006 |
183.6 |
0.092 |
| 2007 |
291.6 |
0.080 |
| 2008 |
324.1 |
0.164 |
| 2009 |
337.6 |
0.189 |
| 2010 |
351.4 |
0.166 |
| 2011 |
13.1 |
0.124 |
| 2012 |
52.7 |
0.097 |
| 2013 |
95.1 |
0.117 |
| 2014 |
118.6 |
0.163 |
| 2015 |
131.7 |
0.206 |
| 2016 |
141.0 |
0.229 |
| 2017 |
149.7 |
0.219 |
| 2018 |
161.7 |
0.163 |
| 2019 |
201.4 |
0.069 |
| 2020 |
305.1 |
0.104 |
| 2021 |
327.9 |
0.177 |
| 2022 |
340.8 |
0.187 |
| 2023 |
355.7 |
0.156 |
| 2024 |
21.1 |
0.114 |
| 2025 |
64.6 |
0.097 |
| 2026 |
102.5 |
0.128 |
| 2027 |
122.5 |
0.175 |
| 2028 |
134.3 |
0.214 |
| 2029 |
143.2 |
0.230 |
| 2030 |
152.2 |
0.209 |
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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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