15152+0456 HDS 2143 (3 Ser)
15h 15m 11.37s +04° 56' 21.7" P.A. 267.00 sep 0.3 mag 5.61,7.90 Sp K0III dist. 114.42 pc (373.24 l.y.)
Coord 2000 |
15152+0456 |
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Discov num |
HDS2143 |
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Comp |
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Coord arcsec 2000 |
15 15 11.37 +04 56 21.7 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
14 |
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Pa first |
233 |
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Pa last |
266.9 |
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P.A. Now (θ) |
266.9° |
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Sep first |
0.2 |
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Sep last |
0.275 |
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Sep. Now (ρ) |
0.275" |
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Mag pri |
5.61 |
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Mag sec |
7.90 |
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delta mag (ΔM) |
2.29 |
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Spectral class |
K0III (yellow-orange) |
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Pri motion ra |
-023 |
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Sec motion ra |
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Pri motion dec |
+004 |
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Sec motion dec |
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Notes |
N
(See Notes) |
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Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
Name |
3 Ser |
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Constellation |
Serpens |
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SAO |
120916 |
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HIP |
74649 |
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Tycho2 |
0344-01146-1 |
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Gaia DR2 |
1156084632057284224 |
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HD |
135482 |
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HR |
5675 |
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GC |
20501 |
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BD |
BD+05 2985 |
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Flamsteed |
3 Serpentis |
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Flamsteed name |
3 Ser |
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FK5 |
562 |
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Distance |
114.42 |
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Distance ly |
373.24 |
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ORBITAL ELEMENTS
Period (P) | 66y | ± 5 |
Periastron (T) | 2063y | ± 5 |
Semi-major axis (a) | 229m | ± 2 |
Eccentricity (e) | 0.962 | ± 0.005 |
Inclination (i) | 132° | ± 4 |
Longitude of periastron (ω) | 275° | ± 5 |
Node (Ω) | 354° | ± 8 |
Notes | | |
Reference | Hor2015b | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
290.8 |
0.102 |
2001 |
286.6 |
0.120 |
2002 |
283.4 |
0.137 |
2003 |
280.8 |
0.151 |
2004 |
278.8 |
0.164 |
2005 |
277.0 |
0.177 |
2006 |
275.4 |
0.188 |
2007 |
274.0 |
0.198 |
2008 |
272.7 |
0.208 |
2009 |
271.6 |
0.217 |
2010 |
270.5 |
0.226 |
2011 |
269.5 |
0.234 |
2012 |
268.6 |
0.241 |
2013 |
267.7 |
0.248 |
2014 |
266.9 |
0.254 |
2015 |
266.1 |
0.260 |
2016 |
265.3 |
0.265 |
2017 |
264.6 |
0.270 |
2018 |
263.9 |
0.275 |
2019 |
263.2 |
0.279 |
2020 |
262.5 |
0.283 |
2021 |
261.9 |
0.286 |
2022 |
261.3 |
0.290 |
2023 |
260.7 |
0.292 |
2024 |
260.0 |
0.295 |
2025 |
259.5 |
0.297 |
2026 |
258.9 |
0.299 |
2027 |
258.3 |
0.300 |
2028 |
257.7 |
0.301 |
2029 |
257.1 |
0.302 |
2030 |
256.6 |
0.302 |
2031 |
256.0 |
0.302 |
2032 |
255.4 |
0.302 |
2033 |
254.8 |
0.301 |
2034 |
254.3 |
0.300 |
2035 |
253.7 |
0.299 |
2036 |
253.1 |
0.297 |
2037 |
252.5 |
0.295 |
2038 |
251.9 |
0.293 |
2039 |
251.3 |
0.290 |
2040 |
250.6 |
0.287 |
2041 |
250.0 |
0.284 |
2042 |
249.3 |
0.280 |
2043 |
248.7 |
0.276 |
2044 |
248.0 |
0.271 |
2045 |
247.2 |
0.266 |
2046 |
246.5 |
0.260 |
2047 |
245.7 |
0.254 |
2048 |
244.9 |
0.248 |
2049 |
244.0 |
0.241 |
2050 |
243.1 |
0.233 |
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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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