00100+0835 A 1801 (HD 542)
00h 09m 57.47s +08° 34' 37.3" P.A. 18.00 sep 0.3 mag 9.50,9.50 Sp F8 dist. 125.31 pc (408.76 l.y.)
Coord 2000 |
00100+0835 |
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Discov num |
A 1801 |
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Comp |
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Coord arcsec 2000 |
00 09 57.47 +08 34 37.3 |
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Date first |
1908 |
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Date last |
2020 |
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Obs |
22 |
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Pa first |
190 |
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Pa last |
18.2 |
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P.A. Now (θ) |
18.2° |
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Sep first |
0.5 |
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Sep last |
0.337 |
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Sep. Now (ρ) |
0.337" |
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Mag pri |
9.50 |
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Mag sec |
9.50 |
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delta mag (ΔM) |
0 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
-058 |
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Sec motion ra |
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Pri motion dec |
-054 |
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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 542 |
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Constellation |
Pisces |
|
HIP |
807 |
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Tycho2 |
0594-00354-1 |
|
HD |
542 |
|
ADS |
120 |
|
BD |
BD+07 10 |
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Distance |
125.31 |
|
Distance ly |
408.76 |
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ORBITAL ELEMENTS
Period (P) | 229y | |
Periastron (T) | 2020y | |
Semi-major axis (a) | 0.435a | |
Eccentricity (e) | 0.132 | |
Inclination (i) | 94.1° | |
Longitude of periastron (ω) | 151.4° | |
Node (Ω) | 195.9° | |
Notes | | |
Reference | Tok2021c | |
Equinox | 2000 | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
26.5 |
0.141 |
2001 |
25.6 |
0.152 |
2002 |
24.7 |
0.164 |
2003 |
24.0 |
0.175 |
2004 |
23.3 |
0.186 |
2005 |
22.8 |
0.197 |
2006 |
22.2 |
0.208 |
2007 |
21.8 |
0.219 |
2008 |
21.4 |
0.229 |
2009 |
21.0 |
0.240 |
2010 |
20.6 |
0.250 |
2011 |
20.3 |
0.259 |
2012 |
20.0 |
0.269 |
2013 |
19.7 |
0.278 |
2014 |
19.5 |
0.286 |
2015 |
19.2 |
0.295 |
2016 |
19.0 |
0.303 |
2017 |
18.7 |
0.311 |
2018 |
18.5 |
0.318 |
2019 |
18.3 |
0.325 |
2020 |
18.1 |
0.332 |
2021 |
17.9 |
0.338 |
2022 |
17.8 |
0.344 |
2023 |
17.6 |
0.349 |
2024 |
17.4 |
0.355 |
2025 |
17.3 |
0.359 |
2026 |
17.1 |
0.364 |
2027 |
16.9 |
0.368 |
2028 |
16.8 |
0.371 |
2029 |
16.6 |
0.374 |
2030 |
16.5 |
0.377 |
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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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