21145+1000 STT 535 AB
21h 14m 28.81s +10° 00' 25.1" P.A. 7.00 sep 0.1 mag 5.19,5.52 Sp F6V+F6V dist. 18.49 pc (60.31 l.y.)
| Coord 2000 |
21145+1000 |
|
Discov num |
STT 535 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 14 28.81 +10 00 25.1 |
|
| Date first |
1852 |
|
Date last |
2021 |
|
Obs |
521 |
|
| Pa first |
15 |
|
Pa last |
7 |
|
P.A. Now (θ) |
28.9° |
|
| Sep first |
0.4 |
|
Sep last |
0.076 |
|
Sep. Now (ρ) |
0.246" |
|
| Mag pri |
5.19 |
|
Mag sec |
5.52 |
|
delta mag (ΔM) |
0.33 |
|
Spectral class |
F6V+F6V (yellow-white/yellow-white) |
|
| Pri motion ra |
+040 |
|
Sec motion ra |
|
|
| Pri motion dec |
-304 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21145+1000 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
126643 |
21 14 29 +10 00 25 |
STT 535 AB |
2021 |
521 |
7 |
0.1 |
5.19 |
5.52 |
0.33 |
Y |
<=== |
| Show |
Del Equ |
126643 |
21 14 29 +10 00 25 |
STF 2777 AB,C |
2016 |
91 |
6 |
76.5 |
4.54 |
10.17 |
5.63 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Equuleus |
|
SAO |
126643 |
|
HIP |
104858 |
|
Tycho2 |
1109-02583-1 |
|
| Gaia DR2 |
1743871762876699776 |
|
HD |
202275 |
|
HR |
8123 |
|
GC |
29697 |
|
| ADS |
14773 |
|
GL |
Gl 822A |
|
BD |
BD+09 4746 |
|
Bayer |
Delta Equulei |
|
| Bayer name |
Del Equ |
|
Flamsteed |
7 Equulei |
|
Flamsteed name |
7 Equ |
|
Distance |
18.49 |
|
| Distance ly |
60.31 |
|
Bayer greek |
δ Equ |
|
ORBITAL ELEMENTS
| Period (P) | 2084.03d (5.71y) | ± 0.1 |
Periastron (T) | 53112.071m (2004.293y) | ± 0.052 |
Semi-major axis (a) | 231.965m | ± 0.008 |
| Eccentricity (e) | 0.436851 | ± 0.000025 |
Inclination (i) | 99.4083° | ± 0.0098 |
Longitude of periastron (ω) | 187.735° | ± 0.013 |
| Node (Ω) | 23.362° | ± 0.012 |
Notes | n | |
Reference | Mut2008 | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
30.6 |
0.215 |
| 2001-01-01 |
24.1 |
0.327 |
| 2002-01-01 |
19.3 |
0.298 |
| 2003-01-01 |
8.4 |
0.140 |
| 2004-01-01 |
211.4 |
0.111 |
| 2005-01-01 |
61.5 |
0.050 |
| 2006-01-01 |
28.0 |
0.264 |
| 2007-01-01 |
22.8 |
0.332 |
| 2008-01-01 |
17.5 |
0.265 |
| 2009-01-01 |
354.3 |
0.074 |
| 2010-01-01 |
202.1 |
0.129 |
| 2011-01-01 |
38.0 |
0.125 |
| 2012-01-01 |
26.2 |
0.299 |
| 2013-01-01 |
21.4 |
0.326 |
| 2014-01-01 |
15.0 |
0.220 |
| 2015-01-01 |
270.8 |
0.034 |
| 2016-01-01 |
189.4 |
0.083 |
| 2017-01-01 |
32.0 |
0.192 |
| 2018-01-01 |
24.7 |
0.321 |
| 2019-01-01 |
20.0 |
0.308 |
| 2020-01-01 |
11.0 |
0.165 |
| 2021-01-01 |
217.3 |
0.090 |
| 2022-01-01 |
104.9 |
0.030 |
| 2023-01-01 |
28.9 |
0.246 |
| 2024-01-01 |
23.3 |
0.331 |
| 2025-01-01 |
18.3 |
0.279 |
| 2026-01-01 |
2.2 |
0.101 |
| 2027-01-01 |
205.5 |
0.130 |
| 2028-01-01 |
42.9 |
0.095 |
| 2029-01-01 |
26.9 |
0.286 |
| 2030-01-01 |
22.0 |
0.330 |
| 2031-01-01 |
16.1 |
0.239 |
| 2032-01-01 |
321.8 |
0.038 |
| 2033-01-01 |
195.9 |
0.108 |
| 2034-01-01 |
33.8 |
0.167 |
| 2035-01-01 |
25.2 |
0.314 |
| 2036-01-01 |
20.6 |
0.317 |
| 2037-01-01 |
12.8 |
0.188 |
| 2038-01-01 |
227.4 |
0.065 |
| 2039-01-01 |
162.7 |
0.041 |
| 2040-01-01 |
30.0 |
0.226 |
| 2041-01-01 |
23.8 |
0.329 |
| 2042-01-01 |
19.0 |
0.292 |
| 2043-01-01 |
6.8 |
0.127 |
| 2044-01-01 |
209.2 |
0.120 |
| 2045-01-01 |
52.4 |
0.065 |
| 2046-01-01 |
27.6 |
0.272 |
| 2047-01-01 |
22.5 |
0.332 |
| 2048-01-01 |
17.0 |
0.257 |
| 2049-01-01 |
347.7 |
0.061 |
| 2050-01-01 |
200.2 |
0.125 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
