23393+7738 NHR 9 AB (Errai)
23h 39m 20.98s +77° 37' 55.1" P.A. 215.00 sep 1.8 mag 1.04,7.30 Sp K1III dist. 14.1 pc (45.99 l.y.)
| Coord 2000 |
23393+7738 |
|
Discov num |
NHR 9 |
|
Comp |
AB |
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Coord arcsec 2000 |
23 39 20.98 +77 37 55.1 |
|
| Date first |
2006 |
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Date last |
2020 |
|
Obs |
8 |
|
| Pa first |
257 |
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Pa last |
214.6 |
|
P.A. Now (θ) |
214.6° |
|
| Sep first |
0.9 |
|
Sep last |
1.787 |
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Sep. Now (ρ) |
1.787" |
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| Mag pri |
1.04 |
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Mag sec |
7.30 |
|
delta mag (ΔM) |
6.26 |
|
Spectral class |
K1III (yellow-orange) |
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| Pri motion ra |
-049 |
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Sec motion ra |
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| Pri motion dec |
+127 |
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Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Errai |
|
Var name |
NSV14656 Cep |
|
Constellation |
Cepheus |
|
SAO |
10818 |
|
| HIP |
116727 |
|
Tycho2 |
4606-03584-1 |
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Gaia DR2 |
2281778105591104768 |
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HD |
222404 |
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| HR |
8974 |
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GC |
32875 |
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GL |
Gl 903 |
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BD |
BD+76 928 |
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| Bayer |
Gamma Cephei |
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Bayer name |
Gam Cep |
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Flamsteed |
35 Cephei |
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Flamsteed name |
35 Cep |
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| FK5 |
893 |
|
Distance |
14.1 |
|
Distance ly |
45.99 |
|
Bayer greek |
γ Cep |
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ORBITAL ELEMENTS
| Period (P) | 67.5y | ± 1.4 |
Periastron (T) | 1991.605y | ± 0.031 |
Semi-major axis (a) | 1.467a | ± 0.046 |
| Eccentricity (e) | 0.4112 | ± 0.0063 |
Inclination (i) | 119.3° | ± 1 |
Longitude of periastron (ω) | 161.01° | ± 0.4 |
| Node (Ω) | 18.04° | ± 0.98 |
Notes | n | |
Reference | Nhr2007 | |
| Equinox | | |
Last observation | 2006 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
142.1 |
0.687 |
| 2001 |
130.9 |
0.669 |
| 2002 |
119.4 |
0.669 |
| 2003 |
108.2 |
0.688 |
| 2004 |
97.9 |
0.725 |
| 2005 |
88.8 |
0.776 |
| 2006 |
80.9 |
0.838 |
| 2007 |
74.2 |
0.908 |
| 2008 |
68.4 |
0.983 |
| 2009 |
63.5 |
1.060 |
| 2010 |
59.3 |
1.139 |
| 2011 |
55.6 |
1.217 |
| 2012 |
52.3 |
1.294 |
| 2013 |
49.5 |
1.369 |
| 2014 |
46.9 |
1.441 |
| 2015 |
44.5 |
1.510 |
| 2016 |
42.4 |
1.576 |
| 2017 |
40.4 |
1.638 |
| 2018 |
38.5 |
1.696 |
| 2019 |
36.8 |
1.750 |
| 2020 |
35.2 |
1.799 |
| 2021 |
33.6 |
1.844 |
| 2022 |
32.2 |
1.885 |
| 2023 |
30.8 |
1.921 |
| 2024 |
29.4 |
1.951 |
| 2025 |
28.1 |
1.977 |
| 2026 |
26.8 |
1.998 |
| 2027 |
25.5 |
2.014 |
| 2028 |
24.2 |
2.024 |
| 2029 |
23.0 |
2.029 |
| 2030 |
21.7 |
2.028 |
|
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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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SUSPECTED ORBITAL ELEMENTS
| Identifier | 23393+7738 |
| coord_arcsec_2000 | 233920.98+773755.1 |
| Period (P) | 902.9d (2.47y) | ± 3.5 |
Periastron (T) | 53147d (2004.387y) | ± 71 |
Semi-major axis (a) | 332.4m | ± 7.7 |
| Eccentricity (e) | 0.115 | ± 0.058 |
Inclination (i) | ° | |
Longitude of periastron (ω) | 63° | ± 27 |
| Node (Ω) | ° | |
Notes | | |
Reference | Nhr2007 | |
| Equinox | | |
Last observation | 2006 | |
Grade | 7 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
157.3 |
0.331 |
| 2001-01-01 |
281.1 |
0.361 |
| 2002-01-01 |
78.7 |
0.295 |
| 2003-01-01 |
225.4 |
0.368 |
| 2004-01-01 |
354.8 |
0.315 |
| 2005-01-01 |
165.4 |
0.336 |
| 2006-01-01 |
288.0 |
0.357 |
| 2007-01-01 |
88.9 |
0.297 |
| 2008-01-01 |
231.9 |
0.370 |
| 2009-01-01 |
4.0 |
0.310 |
| 2010-01-01 |
173.1 |
0.342 |
| 2011-01-01 |
295.1 |
0.353 |
| 2012-01-01 |
98.9 |
0.300 |
| 2013-01-01 |
238.4 |
0.370 |
| 2014-01-01 |
13.4 |
0.305 |
| 2015-01-01 |
180.7 |
0.347 |
| 2016-01-01 |
302.3 |
0.348 |
| 2017-01-01 |
108.7 |
0.304 |
| 2018-01-01 |
244.9 |
0.371 |
| 2019-01-01 |
23.1 |
0.301 |
| 2020-01-01 |
188.0 |
0.351 |
| 2021-01-01 |
309.8 |
0.344 |
| 2022-01-01 |
118.2 |
0.308 |
| 2023-01-01 |
251.5 |
0.370 |
| 2024-01-01 |
33.1 |
0.298 |
| 2025-01-01 |
195.2 |
0.355 |
| 2026-01-01 |
317.5 |
0.338 |
| 2027-01-01 |
127.5 |
0.313 |
| 2028-01-01 |
258.0 |
0.369 |
| 2029-01-01 |
43.2 |
0.296 |
| 2030-01-01 |
202.2 |
0.359 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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