23079+7523 STT 489 AB (Pi Cep)
23h 07m 53.84s +75° 23' 15.3" P.A. 3.00 sep 1.1 mag 4.61,6.80 Sp G0IV dist. 75.64 pc (246.74 l.y.)
| Coord 2000 |
23079+7523 |
|
Discov num |
STT 489 |
|
Comp |
AB |
|
Coord arcsec 2000 |
23 07 53.84 +75 23 15.3 |
|
| Date first |
1843 |
|
Date last |
2022 |
|
Obs |
160 |
|
| Pa first |
330 |
|
Pa last |
2.9 |
|
P.A. Now (θ) |
2.9° |
|
| Sep first |
1.8 |
|
Sep last |
1.13 |
|
Sep. Now (ρ) |
1.13" |
|
| Mag pri |
4.61 |
|
Mag sec |
6.80 |
|
delta mag (ΔM) |
2.19 |
|
Spectral class |
G0IV (yellow) |
|
| Pri motion ra |
+006 |
|
Sec motion ra |
+006 |
|
| Pri motion dec |
-031 |
|
Sec motion dec |
-031 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
23079+7523 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Pi Cep |
10629 |
23 07 54 +75 23 15 |
STT 489 AB |
2022 |
160 |
3 |
1.1 |
4.61 |
6.80 |
2.19 |
Y |
<=== |
| Show |
|
10629 |
23 07 54 +75 23 15 |
HJ 1852 AC |
2003 |
4 |
244 |
57.8 |
4.61 |
12.20 |
7.59 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
Pi Cep |
|
Constellation |
Cepheus |
|
SAO |
10629 |
|
HIP |
114222 |
|
| Tycho2 |
4601-03531-1 |
|
Gaia DR2 |
2232894437098037888 |
|
HD |
218658 |
|
HR |
8819 |
|
| GC |
32237 |
|
ADS |
16538 |
|
BD |
BD+74 1006 |
|
Bayer |
Pi Cephei |
|
| Bayer name |
Pi Cep |
|
Flamsteed |
33 Cephei |
|
Flamsteed name |
33 Cep |
|
Distance |
75.64 |
|
| Distance ly |
246.74 |
|
Bayer greek |
π Cep |
|
ORBITAL ELEMENTS
| Period (P) | 175.9639y | ± 5.3142 |
Periastron (T) | 1932.5594y | ± 0.7697 |
Semi-major axis (a) | 0.88724a | ± 0.02843 |
| Eccentricity (e) | 0.66093 | ± 0.01996 |
Inclination (i) | 41.812° | ± 2.775 |
Longitude of periastron (ω) | 108.22° | ± 3.292 |
| Node (Ω) | 67.993° | ± 4.234 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2010 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
346.7 |
1.061 |
| 2001 |
347.5 |
1.066 |
| 2002 |
348.2 |
1.071 |
| 2003 |
349.0 |
1.076 |
| 2004 |
349.8 |
1.081 |
| 2005 |
350.6 |
1.085 |
| 2006 |
351.3 |
1.090 |
| 2007 |
352.1 |
1.094 |
| 2008 |
352.8 |
1.099 |
| 2009 |
353.6 |
1.103 |
| 2010 |
354.3 |
1.107 |
| 2011 |
355.0 |
1.111 |
| 2012 |
355.8 |
1.114 |
| 2013 |
356.5 |
1.118 |
| 2014 |
357.2 |
1.121 |
| 2015 |
357.9 |
1.125 |
| 2016 |
358.6 |
1.128 |
| 2017 |
359.3 |
1.131 |
| 2018 |
0.1 |
1.134 |
| 2019 |
0.8 |
1.137 |
| 2020 |
1.4 |
1.139 |
| 2021 |
2.1 |
1.142 |
| 2022 |
2.8 |
1.144 |
| 2023 |
3.5 |
1.146 |
| 2024 |
4.2 |
1.148 |
| 2025 |
4.9 |
1.150 |
| 2026 |
5.6 |
1.152 |
| 2027 |
6.2 |
1.153 |
| 2028 |
6.9 |
1.154 |
| 2029 |
7.6 |
1.156 |
| 2030 |
8.3 |
1.157 |
|
|
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 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 23079+7523 STT 489 A |
| coord_arcsec_2000 | 230753.84+752315.3 |
| Period (P) | 556.72d | |
Periastron (T) | 39172.9d (1966.128y) | |
Semi-major axis (a) | 11.7m | ± 0.2 |
| Eccentricity (e) | 0.3 | |
Inclination (i) | 84.9° | ± 0.8 |
Longitude of periastron (ω) | 7.6° | |
| Node (Ω) | 58.6° | ± 0.8 |
Notes | n | |
Reference | Ren2013 | |
| Equinox | 2000 | |
Last observation | | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
230.4 |
0.006 |
| 2001-01-01 |
46.7 |
0.004 |
| 2002-01-01 |
239.9 |
0.015 |
| 2003-01-01 |
225.5 |
0.004 |
| 2004-01-01 |
28.0 |
0.002 |
| 2005-01-01 |
239.3 |
0.015 |
| 2006-01-01 |
208.2 |
0.002 |
| 2007-01-01 |
291.1 |
0.001 |
| 2008-01-01 |
238.7 |
0.015 |
| 2009-01-01 |
101.9 |
0.001 |
| 2010-01-01 |
257.1 |
0.003 |
| 2011-01-01 |
238.2 |
0.015 |
| 2012-01-01 |
71.3 |
0.003 |
| 2013-01-01 |
249.5 |
0.005 |
| 2014-01-01 |
237.6 |
0.015 |
| 2015-01-01 |
64.6 |
0.006 |
| 2016-01-01 |
246.2 |
0.007 |
| 2017-01-01 |
236.9 |
0.014 |
| 2018-01-01 |
61.4 |
0.007 |
| 2019-01-01 |
244.3 |
0.009 |
| 2020-01-01 |
236.1 |
0.013 |
| 2021-01-01 |
59.2 |
0.008 |
| 2022-01-01 |
243.0 |
0.011 |
| 2023-01-01 |
235.2 |
0.012 |
| 2024-01-01 |
57.2 |
0.008 |
| 2025-01-01 |
242.0 |
0.012 |
| 2026-01-01 |
234.1 |
0.010 |
| 2027-01-01 |
55.0 |
0.007 |
| 2028-01-01 |
241.1 |
0.013 |
| 2029-01-01 |
232.4 |
0.008 |
| 2030-01-01 |
51.6 |
0.006 |
|
|
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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