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 |
|
Discov num |
A 1801 |
|
Comp |
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Coord arcsec 2000 |
00 09 57.47 +08 34 37.3 |
|
| Date first |
1908 |
|
Date last |
2020 |
|
Obs |
22 |
|
| Pa first |
190 |
|
Pa last |
18.2 |
|
P.A. Now (θ) |
18.2° |
|
| Sep first |
0.5 |
|
Sep last |
0.337 |
|
Sep. Now (ρ) |
0.337" |
|
| Mag pri |
9.50 |
|
Mag sec |
9.50 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
-058 |
|
Sec motion ra |
|
|
| Pri motion dec |
-054 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 542 |
|
Constellation |
Pisces |
|
HIP |
807 |
|
Tycho2 |
0594-00354-1 |
|
| HD |
542 |
|
ADS |
120 |
|
BD |
BD+07 10 |
|
Distance |
125.31 |
|
| Distance ly |
408.76 |
|
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 |
| 2031 |
16.3 |
0.379 |
| 2032 |
16.2 |
0.381 |
| 2033 |
16.0 |
0.382 |
| 2034 |
15.9 |
0.383 |
| 2035 |
15.8 |
0.384 |
| 2036 |
15.6 |
0.384 |
| 2037 |
15.5 |
0.383 |
| 2038 |
15.3 |
0.383 |
| 2039 |
15.2 |
0.382 |
| 2040 |
15.0 |
0.380 |
| 2041 |
14.9 |
0.378 |
| 2042 |
14.7 |
0.376 |
| 2043 |
14.6 |
0.373 |
| 2044 |
14.4 |
0.370 |
| 2045 |
14.3 |
0.367 |
| 2046 |
14.1 |
0.363 |
| 2047 |
14.0 |
0.359 |
| 2048 |
13.8 |
0.354 |
| 2049 |
13.6 |
0.349 |
| 2050 |
13.4 |
0.344 |
|
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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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