15542+1659 A 2080 (HD 142455)
15h 54m 10.28s +16° 59' 28.0" P.A. 104.00 sep 0.4 mag 8.83,9.20 Sp F2 dist. 132.98 pc (433.78 l.y.)
| Coord 2000 |
15542+1659 |
|
Discov num |
A 2080 |
|
Comp |
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Coord arcsec 2000 |
15 54 10.28 +16 59 28.0 |
|
| Date first |
1909 |
|
Date last |
2016 |
|
Obs |
84 |
|
| Pa first |
317 |
|
Pa last |
103.6 |
|
P.A. Now (θ) |
103.6° |
|
| Sep first |
0.2 |
|
Sep last |
0.384 |
|
Sep. Now (ρ) |
0.384" |
|
| Mag pri |
8.83 |
|
Mag sec |
9.20 |
|
delta mag (ΔM) |
0.37 |
|
Spectral class |
F2 (yellow-white) |
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| Pri motion ra |
+011 |
|
Sec motion ra |
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| Pri motion dec |
+001 |
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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 142455 |
|
Constellation |
Serpens |
|
SAO |
101804 |
|
HIP |
77875 |
|
| Tycho2 |
1496-00733-1 |
|
HD |
142455 |
|
ADS |
9831 |
|
BD |
BD+17 2929 |
|
| Distance |
132.98 |
|
Distance ly |
433.78 |
|
ORBITAL ELEMENTS
| Period (P) | 382.99y | ± 292.64 |
Periastron (T) | 2285.17y | ± 443.01 |
Semi-major axis (a) | 0.369a | ± 0.137 |
| Eccentricity (e) | 0.157 | ± 0.083 |
Inclination (i) | 62.9° | ± 4.5 |
Longitude of periastron (ω) | 40.7° | ± 217.2 |
| Node (Ω) | 294° | ± 12.3 |
Notes | n | |
Reference | Hrt2008 | |
| Equinox | 2000 | |
Last observation | 2004 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
99.4 |
0.341 |
| 2001 |
99.9 |
0.344 |
| 2002 |
100.4 |
0.347 |
| 2003 |
100.8 |
0.350 |
| 2004 |
101.3 |
0.352 |
| 2005 |
101.8 |
0.355 |
| 2006 |
102.2 |
0.358 |
| 2007 |
102.7 |
0.360 |
| 2008 |
103.1 |
0.363 |
| 2009 |
103.5 |
0.365 |
| 2010 |
104.0 |
0.368 |
| 2011 |
104.4 |
0.370 |
| 2012 |
104.8 |
0.373 |
| 2013 |
105.2 |
0.375 |
| 2014 |
105.6 |
0.377 |
| 2015 |
106.0 |
0.379 |
| 2016 |
106.4 |
0.381 |
| 2017 |
106.8 |
0.383 |
| 2018 |
107.2 |
0.385 |
| 2019 |
107.6 |
0.387 |
| 2020 |
108.0 |
0.389 |
| 2021 |
108.4 |
0.390 |
| 2022 |
108.7 |
0.392 |
| 2023 |
109.1 |
0.394 |
| 2024 |
109.5 |
0.395 |
| 2025 |
109.9 |
0.397 |
| 2026 |
110.2 |
0.398 |
| 2027 |
110.6 |
0.399 |
| 2028 |
110.9 |
0.401 |
| 2029 |
111.3 |
0.402 |
| 2030 |
111.7 |
0.403 |
|
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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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