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 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 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)
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
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
Meaning cords, tapes
 
 
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° Notesn ReferenceSca2015c
Equinox2000 Last observation2015 Grade4(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


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds02020%2B0246a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic