02423+4925 HU 539 (HD 16692)
02h 42m 19.72s +49° 24' 58.5" P.A. 358.00 sep 0.1 mag 9.22,9.52 Sp F5 dist. 238.66 pc (778.51 l.y.)
Coord 2000 |
02423+4925 |
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Discov num |
HU 539 |
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Comp |
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Coord arcsec 2000 |
02 42 19.72 +49 24 58.5 |
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Date first |
1902 |
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Date last |
1995 |
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Obs |
30 |
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Pa first |
81 |
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Pa last |
357.8 |
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P.A. Now (θ) |
144.2° |
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Sep first |
0.3 |
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Sep last |
0.135 |
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Sep. Now (ρ) |
0.145" |
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Mag pri |
9.22 |
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Mag sec |
9.52 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
+028 |
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Sec motion ra |
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Pri motion dec |
-012 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 16692 |
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Constellation |
Perseus |
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SAO |
38249 |
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HIP |
12632 |
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Tycho2 |
3304-00739-1 |
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Gaia DR2 |
438845155417056000 |
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HD |
16692 |
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ADS |
2051 |
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BD |
BD+48 737 |
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Distance |
238.66 |
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Distance ly |
778.51 |
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ORBITAL ELEMENTS
Period (P) | 175y | |
Periastron (T) | 2007.1y | |
Semi-major axis (a) | 0.222a | |
Eccentricity (e) | 0.684 | |
Inclination (i) | 144.1° | |
Longitude of periastron (ω) | 124.7° | |
Node (Ω) | 19.4° | |
Notes | | |
Reference | USN2002 | |
Equinox | 2000 | |
Last observation | 1995 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
340.1 |
0.095 |
2001 |
332.9 |
0.086 |
2002 |
324.0 |
0.078 |
2003 |
313.0 |
0.070 |
2004 |
299.7 |
0.064 |
2005 |
284.0 |
0.060 |
2006 |
267.1 |
0.059 |
2007 |
250.5 |
0.061 |
2008 |
235.4 |
0.065 |
2009 |
222.4 |
0.071 |
2010 |
211.4 |
0.077 |
2011 |
202.0 |
0.083 |
2012 |
193.9 |
0.089 |
2013 |
186.9 |
0.095 |
2014 |
180.6 |
0.101 |
2015 |
175.0 |
0.106 |
2016 |
170.0 |
0.111 |
2017 |
165.4 |
0.117 |
2018 |
161.2 |
0.122 |
2019 |
157.3 |
0.126 |
2020 |
153.6 |
0.131 |
2021 |
150.3 |
0.136 |
2022 |
147.1 |
0.140 |
2023 |
144.2 |
0.145 |
2024 |
141.4 |
0.149 |
2025 |
138.8 |
0.154 |
2026 |
136.3 |
0.158 |
2027 |
134.0 |
0.162 |
2028 |
131.8 |
0.166 |
2029 |
129.7 |
0.171 |
2030 |
127.7 |
0.175 |
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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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