00550+2338 STF  73AB (36 And)

Coord 2000	00550+2338		Discov num	STF  73		Comp	AB		Coord arcsec 2000	00 54 58.02 +23 37 42.4
Date first	1830		Date last	2019		Obs	735
Pa first	305		Pa last	338		P.A. Now (θ)	334.5°
Sep first	0.9		Sep last	1.2		Sep. Now (ρ)	1.18"
Mag pri	6.12		Mag sec	6.54		delta mag (ΔM)	0.42		Spectral class	K1IV (yellow-orange)
Pri motion ra	+136		Sec motion ra	+136
Pri motion dec	-030		Sec motion dec	-030
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	36 And	74359	00550+2338	STF 73	AB	1830	2019	735	334	1.2	6.12	6.54	0.42	Y	<===
Show		74359	00550+2338	FOX 115	AB,C	1913	2001	6	223	161.7	5.69	11.00	5.31
Show		74359	00550+2338	TOK 447	AD	1980	2001	4	129	999.9	5.69	10.92	5.23

Quadruple system
5 visible stars in this system

Precise pa	337.5		Precise sep	1.23		Name	36 And		Constellation	Andromeda
SAO	74359		HIP	4288		Tycho2	1739-02318-1		Gaia DR2	38967498624
HD	5286		HR	258		GC	1091		ADS	755
BD	BD+22 146		Flamsteed	36 Andromedae		Flamsteed name	36 And		Distance	37.98
Distance ly	123.89		last precise pa	337.5		last precise sep	1.23

Period (P)	61183d (167.51y)	± 69	Periastron (T)	35543m (1956.191y)	± 21	Semi-major axis (a)	0.9837a	± 0.0011
Eccentricity (e)	0.30603	± 0.00078	Inclination (i)	44.57°	± 0.11	Longitude of periastron (ω)	358.62°	± 0.21
Node (Ω)	173.66°	± 0.13	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2008

label rho theta 2000 0.892 308.2 2001 0.908 309.9 2002 0.925 311.6 2003 0.941 313.2 2004 0.958 314.8 2005 0.974 316.3 2006 0.990 317.8 2007 1.005 319.2 2008 1.021 320.6 2009 1.036 321.9 2010 1.050 323.2 2011 1.065 324.5 2012 1.079 325.7 2013 1.092 326.9 2014 1.105 328.1 2015 1.118 329.2 2016 1.131 330.3 2017 1.143 331.4 2018 1.154 332.5 2019 1.165 333.5 2020 1.176 334.5 2021 1.186 335.6 2022 1.196 336.6 2023 1.205 337.5 2024 1.214 338.5 2025 1.222 339.4 2026 1.230 340.4 2027 1.237 341.3 2028 1.244 342.2 2029 1.250 343.1 2030 1.256 344.0 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
00550+2338	STF 73	AB	2007	676	318	1.0	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2008	677	322	1.0	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2009	680	323	1.0	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2010	708	325	1.1	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2011	710	326	1.2	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2013	718	330	1.0	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2014	709	329	1.0	6.12	6.54	K1IV	NOD	005458.02+233742.4
00550+2338	STF 73	AB	2015	715	329	1.1	6.12	6.54	K1IV	NO	005458.02+233742.4
00550+2338	STF 73	AB	2016	719	330	0.9	6.12	6.54	K1IV	NO	005458.02+233742.4
00550+2338	STF 73	AB	2017	727	334	1.1	6.12	6.54	K1IV	NO	005458.02+233742.4
00550+2338	STF 73	AB	2018	732	334	1.1	6.12	6.54	K1IV	NO	005458.02+233742.4
00550+2338	STF 73	AB	2019	735	338	1.2	6.12	6.54	K1IV	NO	005458.02+233742.4

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