02552+5950 MLR 520 (HD 17911)
02h 55m 12.64s +59° 49' 45.6" P.A. 62.00 sep 0.1 mag 8.76,8.87 Sp A5V dist. 142.25 pc (464.02 l.y.)
Coord 2000 |
02552+5950 |
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Discov num |
MLR 520 |
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Comp |
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Coord arcsec 2000 |
02 55 12.64 +59 49 45.6 |
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Date first |
1974 |
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Date last |
2011 |
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Obs |
14 |
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Pa first |
39 |
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Pa last |
62.4 |
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P.A. Now (θ) |
26.3° |
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Sep first |
0.2 |
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Sep last |
0.112 |
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Sep. Now (ρ) |
0.144" |
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Mag pri |
8.76 |
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Mag sec |
8.87 |
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delta mag (ΔM) |
0.11 |
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Spectral class |
A5V (white) |
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Pri motion ra |
-012 |
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Sec motion ra |
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Pri motion dec |
-002 |
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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 17911 |
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Constellation |
Cassiopeia |
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SAO |
23692 |
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HIP |
13597 |
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Tycho2 |
3713-00833-1 |
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Gaia DR2 |
464579091929508736 |
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HD |
17911 |
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BD |
BD+59 567 |
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Distance |
142.25 |
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Distance ly |
464.02 |
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ORBITAL ELEMENTS
Period (P) | 50.354y | ± 0.237 |
Periastron (T) | 2002.824y | ± 0.24 |
Semi-major axis (a) | 0.1073a | ± 0.0013 |
Eccentricity (e) | 0.53 | ± 0.01 |
Inclination (i) | 143.1° | ± 0.9 |
Longitude of periastron (ω) | 239.5° | ± 2.1 |
Node (Ω) | 66.2° | ± 1.7 |
Notes | | |
Reference | Cve2020b | |
Equinox | | |
Last observation | 2011 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
251.3 |
0.063 |
2001 |
235.6 |
0.056 |
2002 |
214.9 |
0.048 |
2003 |
187.2 |
0.042 |
2004 |
155.4 |
0.042 |
2005 |
128.0 |
0.049 |
2006 |
108.6 |
0.059 |
2007 |
95.1 |
0.070 |
2008 |
85.1 |
0.080 |
2009 |
77.4 |
0.090 |
2010 |
71.1 |
0.099 |
2011 |
65.8 |
0.106 |
2012 |
61.1 |
0.113 |
2013 |
57.0 |
0.119 |
2014 |
53.2 |
0.124 |
2015 |
49.7 |
0.128 |
2016 |
46.4 |
0.132 |
2017 |
43.2 |
0.135 |
2018 |
40.2 |
0.138 |
2019 |
37.3 |
0.140 |
2020 |
34.5 |
0.141 |
2021 |
31.7 |
0.142 |
2022 |
29.0 |
0.143 |
2023 |
26.3 |
0.144 |
2024 |
23.6 |
0.144 |
2025 |
20.9 |
0.143 |
2026 |
18.1 |
0.143 |
2027 |
15.4 |
0.142 |
2028 |
12.6 |
0.140 |
2029 |
9.7 |
0.139 |
2030 |
6.8 |
0.137 |
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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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