00520+3154 A   924

Coord 2000	00520+3154		Discov num	A   924		Comp			Coord arcsec 2000	00 52 01.02 +31 53 59.3
Date first	1905		Date last	2017		Obs	27
Pa first	254		Pa last	306		P.A. Now (θ)	300.7°
Sep first	0.4		Sep last	0.4		Sep. Now (ρ)	0.32"
Mag pri	9.80		Mag sec	9.90		delta mag (ΔM)	0.1		Spectral class	F8 (yellow-white)
Pri motion ra	-008		Sec motion ra
Pri motion dec	+013		Sec motion dec
Notes	O (Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Precise pa	305.6		Precise sep	0.38		Constellation	Pisces		SAO	54212
Tycho2	2280-01106-1		ADS	705		last precise pa	305.6		last precise sep	0.38

Period (P)	182.57y	± 16.74	Periastron (T)	1986.54y	± 0.53	Semi-major axis (a)	0.296a	± 0.001
Eccentricity (e)	0.704	± 0.021	Inclination (i)	154.2°	± 6.2	Longitude of periastron (ω)	318.2°	± 17.6
Node (Ω)	44.8°	± 18.1	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2007

label rho theta 2000 0.182 337.9 2001 0.190 334.7 2002 0.197 331.8 2003 0.205 329.1 2004 0.212 326.5 2005 0.220 324.2 2006 0.227 321.9 2007 0.234 319.9 2008 0.241 317.9 2009 0.248 316.1 2010 0.255 314.3 2011 0.262 312.7 2012 0.268 311.1 2013 0.275 309.6 2014 0.281 308.2 2015 0.287 306.8 2016 0.293 305.5 2017 0.299 304.2 2018 0.305 303.0 2019 0.311 301.9 2020 0.317 300.7 2021 0.322 299.7 2022 0.328 298.6 2023 0.333 297.6 2024 0.338 296.6 2025 0.343 295.7 2026 0.348 294.7 2027 0.353 293.8 2028 0.358 293.0 2029 0.363 292.1 2030 0.367 291.3 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
00520+3154	A 924		1996	20	351	0.1	9.80	9.90	F8	O	005201.02+315359.3
00520+3154	A 924		2007	22	319	0.3	9.80	9.90	F8	O	005201.02+315359.3
00520+3154	A 924		2008	24	133	0.3	9.80	9.90	F8	O	005201.02+315359.3
00520+3154	A 924		2009	25	316	0.3	9.80	9.90	F8	O	005201.02+315359.3
00520+3154	A 924		2017	27	306	0.4	9.80	9.90	F8	O	005201.02+315359.3

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