21137+6424 H 1 48 (HD 202582)
21h 13m 42.46s +64° 24' 15.1" P.A. 245.00 sep 0.8 mag 7.21,7.33 Sp G2IV+G2IV dist. 42.75 pc (139.45 l.y.)
| Coord 2000 |
21137+6424 |
|
Discov num |
H 1 48 |
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Comp |
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Coord arcsec 2000 |
21 13 42.46 +64 24 15.1 |
|
| Date first |
1859 |
|
Date last |
2022 |
|
Obs |
164 |
|
| Pa first |
246 |
|
Pa last |
245 |
|
P.A. Now (θ) |
245.4° |
|
| Sep first |
0.9 |
|
Sep last |
0.799 |
|
Sep. Now (ρ) |
0.81" |
|
| Mag pri |
7.21 |
|
Mag sec |
7.33 |
|
delta mag (ΔM) |
0.12 |
|
Spectral class |
G2IV+G2IV (yellow/yellow) |
|
| Pri motion ra |
+018 |
|
Sec motion ra |
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| Pri motion dec |
-096 |
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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
| Name |
HD 202582 |
|
Constellation |
Cepheus |
|
SAO |
19257 |
|
HIP |
104788 |
|
| Tycho2 |
4256-01036-1 |
|
HD |
202582 |
|
HR |
8133 |
|
GC |
29718 |
|
| ADS |
14783 |
|
BD |
BD+63 1708 |
|
Distance |
42.75 |
|
Distance ly |
139.45 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 21137+6424 |
| coord_arcsec_2000 | 211342.46+642415.1 |
| Period (P) | 82.76y | ± 0.6 |
Periastron (T) | 2002.16y | ± 0.07 |
Semi-major axis (a) | 0.572a | ± 0.003 |
| Eccentricity (e) | 0.733 | ± 0.006 |
Inclination (i) | 82.5° | ± 0.3 |
Longitude of periastron (ω) | 28.2° | ± 0.5 |
| Node (Ω) | 64.7° | ± 0.1 |
Notes | n | |
Reference | Msn2021c | |
| Equinox | | |
Last observation | 2019 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
57.9 |
0.158 |
| 2001 |
62.6 |
0.167 |
| 2002 |
67.7 |
0.143 |
| 2003 |
78.2 |
0.081 |
| 2004 |
166.0 |
0.026 |
| 2005 |
226.4 |
0.094 |
| 2006 |
234.2 |
0.170 |
| 2007 |
237.3 |
0.240 |
| 2008 |
239.0 |
0.304 |
| 2009 |
240.2 |
0.361 |
| 2010 |
241.0 |
0.414 |
| 2011 |
241.7 |
0.462 |
| 2012 |
242.2 |
0.506 |
| 2013 |
242.7 |
0.546 |
| 2014 |
243.1 |
0.583 |
| 2015 |
243.4 |
0.618 |
| 2016 |
243.7 |
0.649 |
| 2017 |
244.0 |
0.678 |
| 2018 |
244.3 |
0.705 |
| 2019 |
244.5 |
0.730 |
| 2020 |
244.8 |
0.753 |
| 2021 |
245.0 |
0.773 |
| 2022 |
245.2 |
0.792 |
| 2023 |
245.4 |
0.810 |
| 2024 |
245.6 |
0.825 |
| 2025 |
245.7 |
0.839 |
| 2026 |
245.9 |
0.852 |
| 2027 |
246.1 |
0.863 |
| 2028 |
246.3 |
0.873 |
| 2029 |
246.4 |
0.881 |
| 2030 |
246.6 |
0.889 |
|
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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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