21135+1559 HU 767 (HD 202128)
21h 13m 28.77s +15° 58' 56.8" P.A. 183.00 sep 0.1 mag 7.05,7.13 Sp A5V dist. 87.64 pc (285.88 l.y.)
| Coord 2000 |
21135+1559 |
|
Discov num |
HU 767 |
|
Comp |
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Coord arcsec 2000 |
21 13 28.77 +15 58 56.8 |
|
| Date first |
1904 |
|
Date last |
2014 |
|
Obs |
181 |
|
| Pa first |
163 |
|
Pa last |
182.9 |
|
P.A. Now (θ) |
94.7° |
|
| Sep first |
0.2 |
|
Sep last |
0.109 |
|
Sep. Now (ρ) |
0.11" |
|
| Mag pri |
7.05 |
|
Mag sec |
7.13 |
|
delta mag (ΔM) |
0.08 |
|
Spectral class |
A5V (white) |
|
| Pri motion ra |
+040 |
|
Sec motion ra |
|
|
| Pri motion dec |
-034 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 202128 |
|
Constellation |
Pegasus |
|
SAO |
106930 |
|
HIP |
104771 |
|
| Tycho2 |
1650-01156-1 |
|
Gaia DR2 |
1760610212502150400 |
|
HD |
202128 |
|
HR |
8116 |
|
| GC |
29673 |
|
ADS |
14761 |
|
BD |
BD+15 4375 |
|
Distance |
87.64 |
|
| Distance ly |
285.88 |
|
ORBITAL ELEMENTS
| Period (P) | 34.33y | ± 0.12 |
Periastron (T) | 1978.083y | ± 0.092 |
Semi-major axis (a) | 0.1907a | ± 0.002 |
| Eccentricity (e) | 0.586 | ± 0.013 |
Inclination (i) | 66.66° | ± 0.61 |
Longitude of periastron (ω) | 120.1° | ± 0.5 |
| Node (Ω) | 169.64° | ± 0.82 |
Notes | n | |
Reference | Hrt1996a | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
149.2 |
0.222 |
| 2001 |
151.7 |
0.226 |
| 2002 |
154.0 |
0.227 |
| 2003 |
156.4 |
0.226 |
| 2004 |
158.8 |
0.223 |
| 2005 |
161.4 |
0.216 |
| 2006 |
164.1 |
0.206 |
| 2007 |
167.2 |
0.190 |
| 2008 |
171.0 |
0.170 |
| 2009 |
176.1 |
0.142 |
| 2010 |
184.2 |
0.105 |
| 2011 |
203.6 |
0.059 |
| 2012 |
283.5 |
0.034 |
| 2013 |
335.9 |
0.072 |
| 2014 |
352.1 |
0.101 |
| 2015 |
2.8 |
0.111 |
| 2016 |
12.5 |
0.112 |
| 2017 |
22.6 |
0.108 |
| 2018 |
33.6 |
0.103 |
| 2019 |
45.7 |
0.099 |
| 2020 |
58.6 |
0.097 |
| 2021 |
71.6 |
0.098 |
| 2022 |
83.9 |
0.103 |
| 2023 |
94.7 |
0.110 |
| 2024 |
104.1 |
0.119 |
| 2025 |
112.0 |
0.130 |
| 2026 |
118.6 |
0.142 |
| 2027 |
124.2 |
0.154 |
| 2028 |
129.0 |
0.166 |
| 2029 |
133.1 |
0.177 |
| 2030 |
136.8 |
0.188 |
|
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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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