02020+0246 STF 202 AB (Alrescha)
02h 02m 02.80s +02° 45' 49.4" P.A. 258.00 sep 1.9 mag 4.10,5.17 Sp A0p+A3m dist. 46.17 pc (150.61 l.y.)
| Coord 2000 |
02020+0246 |
|
Discov num |
STF 202 |
|
Comp |
AB |
|
Coord arcsec 2000 |
02 02 02.80 +02 45 49.4 |
|
| Date first |
1779 |
|
Date last |
2024 |
|
Obs |
635 |
|
| Pa first |
337 |
|
Pa last |
257.9 |
|
P.A. Now (θ) |
257.9° |
|
| Sep first |
5.1 |
|
Sep last |
1.87 |
|
Sep. Now (ρ) |
1.87" |
|
| Mag pri |
4.10 |
|
Mag sec |
5.17 |
|
delta mag (ΔM) |
1.07 |
|
Spectral class |
A0p+A3m (white/white) |
|
| Pri motion ra |
+042 |
|
Sec motion ra |
+042 |
|
| Pri motion dec |
-011 |
|
Sec motion dec |
-011 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
02020+0246 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Alrescha |
110291 |
02 02 03 +02 45 49 |
STF 202 AB |
2024 |
635 |
258 |
1.9 |
4.10 |
5.17 |
1.07 |
Y |
<=== |
| Show |
|
110291 |
02 02 03 +02 45 49 |
PWL 1 AC |
2006 |
9 |
63 |
404.9 |
4.10 |
8.25 |
4.15 |
|
|
| Show |
|
110291 |
02 02 03 +02 45 49 |
PWL 1 AD |
2006 |
9 |
335 |
434.5 |
4.10 |
8.59 |
4.49 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Alrescha |
|
Var name |
NSV705 Psc |
|
Constellation |
Pisces |
|
SAO |
110291 |
|
| HIP |
9487 |
|
Tycho2 |
0040-01338-1 |
|
Gaia DR2 |
2517584007848935808 |
|
HD |
12446 |
|
| HR |
596 |
|
GC |
2452 |
|
ADS |
1615 |
|
BD |
BD+02 317 |
|
| Bayer |
Alpha Piscium |
|
Bayer name |
Alp Psc |
|
Flamsteed |
113 Piscium |
|
Flamsteed name |
113 Psc |
|
| Distance |
46.17 |
|
Distance ly |
150.61 |
|
Bayer greek |
α Psc |
|
| Other names |
Alrisha, Alresha, Kaitain, Okda |
|
ORBITAL ELEMENTS
| Period (P) | 3267.4y | |
Periastron (T) | 2188.58y | |
Semi-major axis (a) | 7.4a | |
| Eccentricity (e) | 0.465 | |
Inclination (i) | 113.4° | |
Longitude of periastron (ω) | 147.9° | |
| Node (Ω) | 3.7° | |
Notes | n | |
Reference | Sca2015c | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
272.7 |
1.843 |
| 2001 |
272.1 |
1.841 |
| 2002 |
271.5 |
1.839 |
| 2003 |
270.9 |
1.838 |
| 2004 |
270.2 |
1.836 |
| 2005 |
269.6 |
1.835 |
| 2006 |
269.0 |
1.834 |
| 2007 |
268.3 |
1.833 |
| 2008 |
267.7 |
1.832 |
| 2009 |
267.1 |
1.831 |
| 2010 |
266.5 |
1.831 |
| 2011 |
265.8 |
1.831 |
| 2012 |
265.2 |
1.831 |
| 2013 |
264.6 |
1.831 |
| 2014 |
263.9 |
1.831 |
| 2015 |
263.3 |
1.832 |
| 2016 |
262.7 |
1.833 |
| 2017 |
262.0 |
1.834 |
| 2018 |
261.4 |
1.835 |
| 2019 |
260.8 |
1.836 |
| 2020 |
260.1 |
1.838 |
| 2021 |
259.5 |
1.839 |
| 2022 |
258.9 |
1.841 |
| 2023 |
258.3 |
1.843 |
| 2024 |
257.6 |
1.846 |
| 2025 |
257.0 |
1.848 |
| 2026 |
256.4 |
1.851 |
| 2027 |
255.8 |
1.854 |
| 2028 |
255.2 |
1.857 |
| 2029 |
254.5 |
1.860 |
| 2030 |
253.9 |
1.864 |
| 2031 |
253.3 |
1.867 |
| 2032 |
252.7 |
1.871 |
| 2033 |
252.1 |
1.875 |
| 2034 |
251.5 |
1.879 |
| 2035 |
250.9 |
1.883 |
| 2036 |
250.3 |
1.888 |
| 2037 |
249.7 |
1.892 |
| 2038 |
249.1 |
1.897 |
| 2039 |
248.5 |
1.902 |
| 2040 |
248.0 |
1.907 |
| 2041 |
247.4 |
1.913 |
| 2042 |
246.8 |
1.918 |
| 2043 |
246.2 |
1.924 |
| 2044 |
245.6 |
1.930 |
| 2045 |
245.1 |
1.936 |
| 2046 |
244.5 |
1.942 |
| 2047 |
244.0 |
1.948 |
| 2048 |
243.4 |
1.954 |
| 2049 |
242.8 |
1.961 |
| 2050 |
242.3 |
1.968 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
