21395-0003 BU 1212 AB
21h 39m 31.39s -00° 03' 04.1" P.A. 156.00 sep 0.1 mag 6.94,8.44 Sp F6V dist. 43.98 pc (143.46 l.y.)
| Coord 2000 |
21395-0003 |
|
Discov num |
BU 1212 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 39 31.39 -00 03 04.1 |
|
| Date first |
1890 |
|
Date last |
2021 |
|
Obs |
271 |
|
| Pa first |
255 |
|
Pa last |
155.6 |
|
P.A. Now (θ) |
192.9° |
|
| Sep first |
0.5 |
|
Sep last |
0.103 |
|
Sep. Now (ρ) |
0.179" |
|
| Mag pri |
6.94 |
|
Mag sec |
8.44 |
|
delta mag (ΔM) |
1.5 |
|
Spectral class |
F6V (yellow-white) |
|
| Pri motion ra |
+228 |
|
Sec motion ra |
+228 |
|
| Pri motion dec |
+015 |
|
Sec motion dec |
+015 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21395-0003 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
145566 |
21 39 31 -00 03 04 |
BU 1212 AB |
2021 |
271 |
156 |
0.1 |
6.94 |
8.44 |
1.50 |
Y |
<=== |
| Show |
HD 206058 |
145566 |
21 39 31 -00 03 04 |
BU 1212 AB,C |
2013 |
20 |
178 |
36.2 |
6.63 |
11.75 |
5.12 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Aquarius |
|
SAO |
145566 |
|
HIP |
106942 |
|
Tycho2 |
5209-00253-1 |
|
| HD |
206058 |
|
GC |
30314 |
|
ADS |
15176 |
|
BD |
BD-00 4245 |
|
| Flamsteed |
24 Aquarii |
|
Flamsteed name |
24 Aqr |
|
Distance |
43.98 |
|
Distance ly |
143.46 |
|
ORBITAL ELEMENTS
| Period (P) | 48.65y | |
Periastron (T) | 1971.55y | |
Semi-major axis (a) | 0.448a | |
| Eccentricity (e) | 0.868 | |
Inclination (i) | 58° | |
Longitude of periastron (ω) | 293° | |
| Node (Ω) | 139.3° | |
Notes | n | |
Reference | Hei1994a | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
273.7 |
0.540 |
| 2001 |
275.0 |
0.542 |
| 2002 |
276.3 |
0.542 |
| 2003 |
277.7 |
0.540 |
| 2004 |
279.0 |
0.538 |
| 2005 |
280.4 |
0.534 |
| 2006 |
281.8 |
0.528 |
| 2007 |
283.2 |
0.521 |
| 2008 |
284.6 |
0.512 |
| 2009 |
286.2 |
0.501 |
| 2010 |
287.8 |
0.488 |
| 2011 |
289.5 |
0.472 |
| 2012 |
291.3 |
0.454 |
| 2013 |
293.3 |
0.432 |
| 2014 |
295.5 |
0.407 |
| 2015 |
298.0 |
0.377 |
| 2016 |
301.1 |
0.341 |
| 2017 |
304.9 |
0.296 |
| 2018 |
310.4 |
0.239 |
| 2019 |
320.3 |
0.161 |
| 2020 |
20.7 |
0.038 |
| 2021 |
155.8 |
0.111 |
| 2022 |
178.5 |
0.151 |
| 2023 |
192.9 |
0.179 |
| 2024 |
203.6 |
0.203 |
| 2025 |
212.1 |
0.227 |
| 2026 |
219.0 |
0.250 |
| 2027 |
224.8 |
0.272 |
| 2028 |
229.7 |
0.293 |
| 2029 |
233.9 |
0.313 |
| 2030 |
237.7 |
0.333 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
