16088+4456 NOI 2 (Phi Her)
16h 08m 46.20s +44° 56' 05.3" P.A. 59.00 sep 0.0 mag 4.23, Sp B9 dist. 62.54 pc (204.01 l.y.)
Coord 2000 |
16088+4456 |
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Discov num |
NOI 2 |
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Comp |
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Coord arcsec 2000 |
16 08 46.20 +44 56 05.3 |
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Date first |
1997 |
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Date last |
2005 |
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Obs |
34 |
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Pa first |
224 |
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Pa last |
59.3 |
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P.A. Now (θ) |
59.3° |
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Sep first |
0.0 |
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Sep last |
0.018 |
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Sep. Now (ρ) |
0.018" |
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Mag pri |
4.23 |
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Mag sec |
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delta mag (ΔM) |
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Spectral class |
B9 (blue-white) |
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Pri motion ra |
-026 |
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Sec motion ra |
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Pri motion dec |
+036 |
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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 |
Phi Her |
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Var name |
NSV7490 Her |
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Constellation |
Hercules |
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SAO |
45911 |
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HIP |
79101 |
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Tycho2 |
3067-01842-1 |
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Gaia DR2 |
1386158505321789696 |
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HD |
145389 |
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HR |
6023 |
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GC |
21736 |
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BD |
BD+45 2376 |
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Bayer |
Phi Herculis |
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Bayer name |
Phi Her |
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Flamsteed |
11 Herculis |
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Flamsteed name |
11 Her |
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FK5 |
601 |
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Distance |
62.54 |
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Distance ly |
204.01 |
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Bayer greek |
φ Her |
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ORBITAL ELEMENTS
Period (P) | 564.69d | ± 0.13 |
Periastron (T) | 50121.8d (1996.105y) | ± 1 |
Semi-major axis (a) | 32.1m | ± 0.2 |
Eccentricity (e) | 0.522 | ± 0.004 |
Inclination (i) | 12.1° | ± 2.9 |
Longitude of periastron (ω) | 351.9° | ± 2.7 |
Node (Ω) | 9.1° | ± 2.5 |
Notes | n | |
Reference | Zav2007 | |
Equinox | 2000 | |
Last observation | 2005 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
183.7 |
0.049 |
2001-01-01 |
122.7 |
0.031 |
2002-01-01 |
233.1 |
0.034 |
2003-01-01 |
175.9 |
0.049 |
2004-01-01 |
98.9 |
0.025 |
2005-01-01 |
219.2 |
0.039 |
2006-01-01 |
167.9 |
0.047 |
2007-01-01 |
56.5 |
0.018 |
2008-01-01 |
208.4 |
0.043 |
2009-01-01 |
159.3 |
0.045 |
2010-01-01 |
344.6 |
0.016 |
2011-01-01 |
199.2 |
0.046 |
2012-01-01 |
149.4 |
0.041 |
2013-01-01 |
283.7 |
0.021 |
2014-01-01 |
190.9 |
0.048 |
2015-01-01 |
137.4 |
0.037 |
2016-01-01 |
251.2 |
0.028 |
2017-01-01 |
183.1 |
0.049 |
2018-01-01 |
121.3 |
0.031 |
2019-01-01 |
231.9 |
0.034 |
2020-01-01 |
175.4 |
0.049 |
2021-01-01 |
96.7 |
0.024 |
2022-01-01 |
218.3 |
0.039 |
2023-01-01 |
167.3 |
0.047 |
2024-01-01 |
52.2 |
0.017 |
2025-01-01 |
207.7 |
0.044 |
2026-01-01 |
158.6 |
0.045 |
2027-01-01 |
339.0 |
0.016 |
2028-01-01 |
198.6 |
0.046 |
2029-01-01 |
148.6 |
0.041 |
2030-01-01 |
280.5 |
0.021 |
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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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