02020+0246 STF 202AB (Alrisha)

 
 
02h 02m 02.80s +02 45' 49.4" P.A. 261.10 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
264
P.A. Now (θ)
261.1°
Sep first
5.1
Sep last
1.9
Sep. Now (ρ)
1.85"
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)
Visually invisible, K-band or other infrared star This double is physical.
 
 
02020+0246 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Alrisha 110291 02020+0246 STF 202 AB 1779 2019 631 261 1.8 4.10 5.17 1.07 Y <===
Show 110291 02020+0246 PWL 1 AC 1856 2006 9 63 404.9 4.10 8.25 4.15
Show 110291 02020+0246 PWL 1 AD 1856 2006 9 335 434.5 4.10 8.59 4.49
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
263.5
Precise sep
1.93
Common name
Alrisha
Meaning
cords, tapes
Other names
ALRISCHA, OKDA, KAITAIN
Constellation
Pisces
SAO
110291
HIP
9487
Tycho2
0040-01338-1
Gaia DR2
07848935808
HD
12446
HR
595
GC
2452
ADS
1615
BD
BD+02 317
Bayer
Alpha Piscium
Bayer name
Alp Psc
Flamsteed
113 Piscium
Flamsteed name
113 Ps
Distance
46.17
Distance ly
150.61
last precise pa
263.5
last precise sep
1.93
 
 
ORBITAL ELEMENTS
 
 
Period (P)1946.9984y± 796.241 Periastron (T)2179.9279y± 83.7955 Semi-major axis (a)8.28932a± 3.29562
Eccentricity (e)0.78486± 0.19765 Inclination (i)105.175°± 7.113 Longitude of periastron (ω)227.073°± 33.21
Node (Ω)18.692°± 14.955 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2014
label rho theta
2000 1.853 273.2
2001 1.851 272.6
2002 1.849 272.0
2003 1.848 271.4
2004 1.847 270.8
2005 1.846 270.2
2006 1.845 269.6
2007 1.845 269.0
2008 1.844 268.4
2009 1.844 267.7
2010 1.844 267.1
2011 1.844 266.5
2012 1.844 265.9
2013 1.844 265.3
2014 1.845 264.7
2015 1.846 264.1
2016 1.846 263.5
2017 1.848 262.9
2018 1.849 262.3
2019 1.850 261.7
2020 1.852 261.1
2021 1.853 260.5
2022 1.855 259.9
2023 1.857 259.3
2024 1.859 258.7
2025 1.862 258.1
2026 1.864 257.5
2027 1.867 256.9
2028 1.870 256.3
2029 1.872 255.7
2030 1.876 255.2

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






wds02020%2B0246d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
02020+0246 STF 202 AB 2007 588 269 1.8 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2008 592 269 1.9 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2009 597 268 1.8 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2010 608 267 1.8 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2011 610 266 1.9 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2012 615 266 1.7 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2014 620 263 1.6 4.10 5.17 A0p A3m NOD 020202.80+024549.4
02020+0246 STF 202 AB 2015 616 264 1.8 4.10 5.17 A0p+A3m NO 020202.80+024549.4
02020+0246 STF 202 AB 2016 619 265 1.8 4.10 5.17 A0p+A3m NO 020202.80+024549.4
02020+0246 STF 202 AB 2017 621 265 1.9 4.10 5.17 A0p+A3m NO 020202.80+024549.4
02020+0246 STF 202 AB 2019 631 264 1.9 4.10 5.17 A0p+A3m NO 020202.80+024549.4

If you need more information about this double, apply for a data request form to the WDS.