02020+0246 STF 202AB (Alrisha)

 
 
02h 02m 02.80s +02 45' 49.4" P.A. 261.4 sep 1.84 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
2017
Obs
621
Pa first
337
Pa last
265
P.A. Now (θ)
261.4°
Sep first
5.1
Sep last
1.9
Sep. Now (ρ)
1.84"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Alrisha 110291 02020+0246 STF 202 AB 1779 2017 621 261 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
264.5
Precise sep
1.941
Common name
Alrisha
Meaning
cords, tapes
Other names
ALRISCHA, OKDA, KAITAIN
Constellation
Pisces
SAO
110291
HIP
9487
Tycho2
0040-01338-1
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
264.5
last precise sep
1.941
 
 
ORBITAL ELEMENTS
 
 
Period (P)3267.4y Periastron (T)2188.6y Semi-major axis (a)7.4a
Eccentricity (e)0.465 Inclination (i)113.4° Longitude of periastron (ω)147.9°
Node (Ω)3.7° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 1.843 272.8
2001 1.841 272.1
2002 1.839 271.5
2003 1.838 270.9
2004 1.836 270.3
2005 1.835 269.6
2006 1.834 269.0
2007 1.833 268.4
2008 1.832 267.7
2009 1.831 267.1
2010 1.831 266.5
2011 1.831 265.8
2012 1.831 265.2
2013 1.831 264.6
2014 1.831 263.9
2015 1.832 263.3
2016 1.833 262.7
2017 1.834 262.0
2018 1.835 261.4
2019 1.836 260.8
2020 1.838 260.1
2021 1.839 259.5
2022 1.841 258.9
2023 1.843 258.3
2024 1.846 257.6
2025 1.848 257.0
2026 1.851 256.4
2027 1.854 255.8
2028 1.857 255.2
2029 1.860 254.6
2030 1.863 253.9

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

grafico orbita





wds02020%2B0246b.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

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