15370+6426 HU 1168 (HD 139905)
15h 37m 00.37s +64° 26' 23.3" P.A. 290.00 sep 0.6 mag 9.48,9.73 Sp G5 dist. 55.71 pc (181.73 l.y.)
Coord 2000 |
15370+6426 |
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Discov num |
HU 1168 |
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Comp |
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Coord arcsec 2000 |
15 37 00.37 +64 26 23.3 |
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Date first |
1905 |
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Date last |
2016 |
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Obs |
39 |
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Pa first |
318 |
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Pa last |
290.3 |
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P.A. Now (θ) |
283.1° |
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Sep first |
0.3 |
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Sep last |
0.554 |
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Sep. Now (ρ) |
0.498" |
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Mag pri |
9.48 |
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Mag sec |
9.73 |
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delta mag (ΔM) |
0.25 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
-001 |
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Sec motion ra |
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Pri motion dec |
+039 |
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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 139905 |
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Constellation |
Draco |
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SAO |
16785 |
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HIP |
76466 |
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Tycho2 |
4184-00297-1 |
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Gaia DR2 |
1641284849807400064 |
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HD |
139905 |
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ADS |
9730 |
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BD |
BD+64 1081 |
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Distance |
55.71 |
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Distance ly |
181.73 |
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ORBITAL ELEMENTS
Period (P) | 88.57y | ± 0.7 |
Periastron (T) | 1984.44y | ± 0.09 |
Semi-major axis (a) | 0.376a | ± 0.06 |
Eccentricity (e) | 0.599 | ± 0.006 |
Inclination (i) | 122.7° | ± 2 |
Longitude of periastron (ω) | 47.7° | ± 18.5 |
Node (Ω) | 127.8° | ± 11 |
Notes | n | |
Reference | Doc2009g | |
Equinox | 2000 | |
Last observation | 1997 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
307.7 |
0.405 |
2001 |
306.3 |
0.419 |
2002 |
304.9 |
0.431 |
2003 |
303.6 |
0.443 |
2004 |
302.4 |
0.453 |
2005 |
301.2 |
0.463 |
2006 |
300.0 |
0.471 |
2007 |
298.9 |
0.479 |
2008 |
297.9 |
0.485 |
2009 |
296.8 |
0.491 |
2010 |
295.8 |
0.496 |
2011 |
294.8 |
0.500 |
2012 |
293.8 |
0.503 |
2013 |
292.8 |
0.506 |
2014 |
291.9 |
0.508 |
2015 |
290.9 |
0.509 |
2016 |
289.9 |
0.510 |
2017 |
289.0 |
0.510 |
2018 |
288.0 |
0.509 |
2019 |
287.1 |
0.508 |
2020 |
286.1 |
0.506 |
2021 |
285.1 |
0.504 |
2022 |
284.1 |
0.501 |
2023 |
283.1 |
0.498 |
2024 |
282.1 |
0.494 |
2025 |
281.1 |
0.490 |
2026 |
280.1 |
0.485 |
2027 |
279.0 |
0.480 |
2028 |
277.9 |
0.475 |
2029 |
276.8 |
0.469 |
2030 |
275.6 |
0.463 |
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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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