21423+0555 HU 280 (HD 206512)
21h 42m 18.45s +05° 54' 43.0" sep 0.1 mag 8.33,8.50 Sp A5 dist. 195.31 pc (637.1 l.y.)
| Coord 2000 |
21423+0555 |
|
Discov num |
HU 280 |
|
Comp |
|
|
Coord arcsec 2000 |
21 42 18.45 +05 54 43.0 |
|
| Date first |
1900 |
|
Date last |
2021 |
|
Obs |
77 |
|
| Pa first |
318 |
|
Pa last |
0.2 |
|
P.A. Now (θ) |
34.6° |
|
| Sep first |
0.2 |
|
Sep last |
0.059 |
|
Sep. Now (ρ) |
0.154" |
|
| Mag pri |
8.33 |
|
Mag sec |
8.50 |
|
delta mag (ΔM) |
0.17 |
|
Spectral class |
A5 (white) |
|
| Pri motion ra |
+013 |
|
Sec motion ra |
|
|
| Pri motion dec |
+023 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 206512 |
|
Constellation |
Pegasus |
|
SAO |
127003 |
|
HIP |
107153 |
|
| Tycho2 |
0555-00042-1 |
|
Gaia DR2 |
2700223368942878208 |
|
HD |
206512 |
|
ADS |
15236 |
|
| BD |
BD+05 4851 |
|
Distance |
195.31 |
|
Distance ly |
637.1 |
|
ORBITAL ELEMENTS SOLUTION #1
| Period (P) | 170.43y | |
Periastron (T) | 1794.63y | |
Semi-major axis (a) | 0.214a | |
| Eccentricity (e) | 0.054 | |
Inclination (i) | 46.3° | |
Longitude of periastron (ω) | 315.3° | |
| Node (Ω) | 315.1° | |
Notes | n | |
Reference | USN2006a | |
| Equinox | 2000 | |
Last observation | 2000 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
341.0 |
0.192 |
| 2001 |
342.9 |
0.190 |
| 2002 |
344.7 |
0.188 |
| 2003 |
346.6 |
0.187 |
| 2004 |
348.6 |
0.185 |
| 2005 |
350.5 |
0.183 |
| 2006 |
352.6 |
0.180 |
| 2007 |
354.6 |
0.178 |
| 2008 |
356.8 |
0.176 |
| 2009 |
358.9 |
0.174 |
| 2010 |
1.2 |
0.172 |
| 2011 |
3.4 |
0.170 |
| 2012 |
5.8 |
0.168 |
| 2013 |
8.2 |
0.166 |
| 2014 |
10.6 |
0.165 |
| 2015 |
13.1 |
0.163 |
| 2016 |
15.6 |
0.161 |
| 2017 |
18.2 |
0.160 |
| 2018 |
20.9 |
0.158 |
| 2019 |
23.5 |
0.157 |
| 2020 |
26.3 |
0.156 |
| 2021 |
29.0 |
0.155 |
| 2022 |
31.8 |
0.154 |
| 2023 |
34.6 |
0.154 |
| 2024 |
37.5 |
0.153 |
| 2025 |
40.3 |
0.153 |
| 2026 |
43.1 |
0.153 |
| 2027 |
46.0 |
0.153 |
| 2028 |
48.8 |
0.154 |
| 2029 |
51.6 |
0.154 |
| 2030 |
54.4 |
0.155 |
|
|
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 |
|
ORBITAL ELEMENTS SOLUTION #2
| Period (P) | 80.77y | ± 2.52 |
Periastron (T) | 2020.46y | ± 0.15 |
Semi-major axis (a) | 0.1778a | ± 0.0074 |
| Eccentricity (e) | 0.721 | ± 0.024 |
Inclination (i) | 51.8° | ± 2.2 |
Longitude of periastron (ω) | 103.3° | ± 2.9 |
| Node (Ω) | 198.2° | ± 4.9 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
158.8 |
0.196 |
| 2001 |
160.4 |
0.194 |
| 2002 |
162.0 |
0.191 |
| 2003 |
163.7 |
0.189 |
| 2004 |
165.4 |
0.186 |
| 2005 |
167.2 |
0.182 |
| 2006 |
169.1 |
0.178 |
| 2007 |
171.0 |
0.174 |
| 2008 |
173.0 |
0.169 |
| 2009 |
175.2 |
0.164 |
| 2010 |
177.5 |
0.158 |
| 2011 |
180.1 |
0.151 |
| 2012 |
182.9 |
0.144 |
| 2013 |
186.0 |
0.135 |
| 2014 |
189.5 |
0.125 |
| 2015 |
193.8 |
0.114 |
| 2016 |
199.1 |
0.100 |
| 2017 |
206.2 |
0.085 |
| 2018 |
216.8 |
0.066 |
| 2019 |
236.4 |
0.046 |
| 2020 |
280.6 |
0.031 |
| 2021 |
336.0 |
0.039 |
| 2022 |
3.5 |
0.057 |
| 2023 |
17.9 |
0.073 |
| 2024 |
27.5 |
0.085 |
| 2025 |
34.9 |
0.095 |
| 2026 |
41.1 |
0.103 |
| 2027 |
46.4 |
0.110 |
| 2028 |
51.1 |
0.116 |
| 2029 |
55.4 |
0.121 |
| 2030 |
59.4 |
0.125 |
|
|
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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