12507+2032 HU 640 AB
12h 50m 41.87s +20° 32' 04.9" P.A. 259.00 sep 0.5 mag 10.19,9.91 Sp K5 dist. 38.27 pc (124.84 l.y.)
| Coord 2000 |
12507+2032 |
|
Discov num |
HU 640 |
|
Comp |
AB |
|
Coord arcsec 2000 |
12 50 41.87 +20 32 04.9 |
|
| Date first |
1903 |
|
Date last |
2019 |
|
Obs |
94 |
|
| Pa first |
284 |
|
Pa last |
258.9 |
|
P.A. Now (θ) |
268.9° |
|
| Sep first |
0.4 |
|
Sep last |
0.458 |
|
Sep. Now (ρ) |
0.442" |
|
| Mag pri |
10.19 |
|
Mag sec |
9.91 |
|
delta mag (ΔM) |
0.28 |
|
Spectral class |
K5 (yellow-orange) |
|
| Pri motion ra |
-125 |
|
Sec motion ra |
-125 |
|
| Pri motion dec |
-033 |
|
Sec motion dec |
-033 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
12507+2032 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
12 50 42 +20 32 05 |
HU 640 AB |
2019 |
94 |
259 |
0.5 |
10.19 |
9.91 |
0.28 |
Y |
<=== |
| Show |
|
|
12 50 42 +20 32 05 |
TOK 561 AC |
2015 |
7 |
119 |
999.9 |
9.39 |
14.75 |
5.36 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Coma Berenices |
|
HIP |
62686 |
|
Tycho2 |
1455-01057-1 |
|
ADS |
8680 |
|
| BD |
BD+21 2462 |
|
Distance |
38.27 |
|
Distance ly |
124.84 |
|
ORBITAL ELEMENTS
| Period (P) | 124.28y | |
Periastron (T) | 1911.28y | |
Semi-major axis (a) | 0.62a | |
| Eccentricity (e) | 0.387 | |
Inclination (i) | 54.8° | |
Longitude of periastron (ω) | 46.9° | |
| Node (Ω) | 286.3° | |
Notes | | |
Reference | Hrt2014b | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
191.9 |
0.431 |
| 2001 |
195.2 |
0.425 |
| 2002 |
198.5 |
0.420 |
| 2003 |
201.9 |
0.416 |
| 2004 |
205.3 |
0.413 |
| 2005 |
208.8 |
0.410 |
| 2006 |
212.3 |
0.408 |
| 2007 |
215.9 |
0.407 |
| 2008 |
219.5 |
0.407 |
| 2009 |
223.1 |
0.407 |
| 2010 |
226.6 |
0.408 |
| 2011 |
230.2 |
0.410 |
| 2012 |
233.7 |
0.413 |
| 2013 |
237.1 |
0.416 |
| 2014 |
240.5 |
0.419 |
| 2015 |
243.9 |
0.422 |
| 2016 |
247.1 |
0.426 |
| 2017 |
250.4 |
0.430 |
| 2018 |
253.6 |
0.433 |
| 2019 |
256.7 |
0.436 |
| 2020 |
259.8 |
0.439 |
| 2021 |
262.8 |
0.441 |
| 2022 |
265.9 |
0.442 |
| 2023 |
268.9 |
0.442 |
| 2024 |
271.9 |
0.441 |
| 2025 |
275.0 |
0.439 |
| 2026 |
278.1 |
0.435 |
| 2027 |
281.3 |
0.429 |
| 2028 |
284.5 |
0.422 |
| 2029 |
287.9 |
0.412 |
| 2030 |
291.5 |
0.401 |
|
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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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