02020+0246 STF 202 AB (Alrescha)
02h 02m 02.80s +02° 45' 49.4" P.A. 264.00 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 |
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Coord arcsec 2000 |
02 02 02.80 +02 45 49.4 |
|
Date first |
1779 |
|
Date last |
2019 |
|
Obs |
631 |
|
Pa first |
337 |
|
Pa last |
263.5 |
|
P.A. Now (θ) |
263.5° |
|
Sep first |
5.1 |
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Sep last |
1.93 |
|
Sep. Now (ρ) |
1.93" |
|
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) |
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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 |
2019 |
631 |
264 |
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 |
|
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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 |
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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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