22478-0414 STF 2944 AB (HD 215812)
22h 47m 50.05s -04° 13' 43.6" P.A. 309.00 sep 1.8 mag 7.30,7.68 Sp G2V+G4 dist. 32.03 pc (104.48 l.y.)
| Coord 2000 |
22478-0414 |
|
Discov num |
STF2944 |
|
Comp |
AB |
|
Coord arcsec 2000 |
22 47 50.05 -04 13 43.6 |
|
| Date first |
1782 |
|
Date last |
2021 |
|
Obs |
431 |
|
| Pa first |
244 |
|
Pa last |
309 |
|
P.A. Now (θ) |
309° |
|
| Sep first |
4.4 |
|
Sep last |
1.807 |
|
Sep. Now (ρ) |
1.807" |
|
| Mag pri |
7.30 |
|
Mag sec |
7.68 |
|
delta mag (ΔM) |
0.38 |
|
Spectral class |
G2V+G4 (yellow/yellow) |
|
| Pri motion ra |
-184 |
|
Sec motion ra |
-200 |
|
| Pri motion dec |
-295 |
|
Sec motion dec |
-313 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.065 (< 0.3, Physical double)
This double is physical.
22478-0414 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 215812 |
146315 |
22 47 50 -04 13 44 |
STF 2944 AB |
2021 |
431 |
309 |
1.8 |
7.30 |
7.68 |
0.38 |
Y |
<=== |
| Show |
|
146315 |
22 47 50 -04 13 44 |
STF 2944 AC |
2017 |
123 |
85 |
60.6 |
7.30 |
8.58 |
1.28 |
|
|
| Show |
|
146315 |
22 47 50 -04 13 44 |
STF 2944 AD |
2000 |
3 |
348 |
220.3 |
7.30 |
12.90 |
5.60 |
|
|
| Show |
|
146317 |
22 47 50 -04 13 44 |
STF 2944 BC |
2013 |
88 |
85 |
59.3 |
7.68 |
8.58 |
0.90 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 215812 |
|
Constellation |
Aquarius |
|
SAO |
146315 |
|
HIP |
112559 |
|
| Tycho2 |
5237-01609-1 |
|
HD |
215812 |
|
GC |
31809 |
|
ADS |
16270 |
|
| BD |
BD-04 5757 |
|
Distance |
32.03 |
|
Distance ly |
104.48 |
|
ORBITAL ELEMENTS
| Period (P) | 602.8834y | ± 280.2595 |
Periastron (T) | 2111.4151y | ± 31.7156 |
Semi-major axis (a) | 3.18601a | ± 0.87502 |
| Eccentricity (e) | 0.66386 | ± 0.21684 |
Inclination (i) | 56.203° | ± 11.903 |
Longitude of periastron (ω) | 46.974° | ± 34.679 |
| Node (Ω) | 31.116° | ± 19.085 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
293.9 |
2.058 |
| 2001 |
294.5 |
2.046 |
| 2002 |
295.1 |
2.034 |
| 2003 |
295.7 |
2.022 |
| 2004 |
296.4 |
2.010 |
| 2005 |
297.0 |
1.998 |
| 2006 |
297.6 |
1.986 |
| 2007 |
298.3 |
1.975 |
| 2008 |
298.9 |
1.963 |
| 2009 |
299.6 |
1.952 |
| 2010 |
300.2 |
1.940 |
| 2011 |
300.9 |
1.929 |
| 2012 |
301.6 |
1.918 |
| 2013 |
302.3 |
1.907 |
| 2014 |
303.0 |
1.896 |
| 2015 |
303.7 |
1.885 |
| 2016 |
304.4 |
1.874 |
| 2017 |
305.1 |
1.864 |
| 2018 |
305.9 |
1.853 |
| 2019 |
306.6 |
1.843 |
| 2020 |
307.3 |
1.833 |
| 2021 |
308.1 |
1.823 |
| 2022 |
308.9 |
1.813 |
| 2023 |
309.6 |
1.803 |
| 2024 |
310.4 |
1.793 |
| 2025 |
311.2 |
1.784 |
| 2026 |
312.0 |
1.774 |
| 2027 |
312.8 |
1.765 |
| 2028 |
313.6 |
1.756 |
| 2029 |
314.4 |
1.747 |
| 2030 |
315.3 |
1.738 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
