02020+0246 STF 202AB (Alrisha)

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.

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

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

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			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2014

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.
		Measures: green=micrometric, blue=interferometric, purple=photographic

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

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