21395-0003 BU 1212 AB
21h 39m 31.39s -00° 03' 04.1" P.A. 195.00 sep 0.2 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 |
2023 |
|
Obs |
281 |
|
| Pa first |
255 |
|
Pa last |
195.3 |
|
P.A. Now (θ) |
212.1° |
|
| Sep first |
0.5 |
|
Sep last |
0.175 |
|
Sep. Now (ρ) |
0.227" |
|
| 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 |
2023 |
281 |
195 |
0.2 |
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) | 48.88y | ± 0.1 |
Periastron (T) | 2020.814y | ± 0.007 |
Semi-major axis (a) | 0.4211a | ± 0.0018 |
| Eccentricity (e) | 0.861 | ± 0.001 |
Inclination (i) | 54.7° | ± 0.3 |
Longitude of periastron (ω) | 294.4° | ± 0.3 |
| Node (Ω) | 140.4° | ± 0.3 |
Notes | n | |
Reference | Tok2024c | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
273.4 |
0.537 |
| 2001 |
274.8 |
0.538 |
| 2002 |
276.1 |
0.538 |
| 2003 |
277.4 |
0.537 |
| 2004 |
278.8 |
0.534 |
| 2005 |
280.1 |
0.530 |
| 2006 |
281.5 |
0.524 |
| 2007 |
282.9 |
0.517 |
| 2008 |
284.4 |
0.508 |
| 2009 |
285.9 |
0.498 |
| 2010 |
287.5 |
0.485 |
| 2011 |
289.2 |
0.470 |
| 2012 |
291.0 |
0.453 |
| 2013 |
292.9 |
0.432 |
| 2014 |
295.1 |
0.409 |
| 2015 |
297.6 |
0.381 |
| 2016 |
300.4 |
0.348 |
| 2017 |
304.0 |
0.309 |
| 2018 |
308.7 |
0.261 |
| 2019 |
316.0 |
0.199 |
| 2020 |
332.7 |
0.110 |
| 2021 |
120.9 |
0.058 |
| 2022 |
168.3 |
0.124 |
| 2023 |
187.5 |
0.159 |
| 2024 |
200.4 |
0.187 |
| 2025 |
210.0 |
0.213 |
| 2026 |
217.6 |
0.238 |
| 2027 |
223.8 |
0.262 |
| 2028 |
228.9 |
0.284 |
| 2029 |
233.3 |
0.306 |
| 2030 |
237.1 |
0.327 |
| 2031 |
240.5 |
0.347 |
| 2032 |
243.6 |
0.365 |
| 2033 |
246.3 |
0.383 |
| 2034 |
248.8 |
0.400 |
| 2035 |
251.1 |
0.416 |
| 2036 |
253.3 |
0.431 |
| 2037 |
255.3 |
0.445 |
| 2038 |
257.1 |
0.458 |
| 2039 |
258.9 |
0.470 |
| 2040 |
260.6 |
0.481 |
| 2041 |
262.2 |
0.492 |
| 2042 |
263.8 |
0.501 |
| 2043 |
265.3 |
0.509 |
| 2044 |
266.8 |
0.517 |
| 2045 |
268.2 |
0.523 |
| 2046 |
269.6 |
0.528 |
| 2047 |
270.9 |
0.532 |
| 2048 |
272.3 |
0.536 |
| 2049 |
273.6 |
0.538 |
| 2050 |
274.9 |
0.538 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
