03082+4057 LAB 2 Aa,Ab

Coord 2000	03082+4057		Discov num	LAB   2		Comp	Aa,Ab		Coord arcsec 2000	03 08 10.13 +40 57 20.3
Date first	1973		Date last	2010		Obs	119
Pa first	123		Pa last	304.2		P.A. Now (θ)	304.2°
Sep first	0.1		Sep last	0.068		Sep. Now (ρ)	0.068"
Mag pri	2.12		Mag sec	4.60		delta mag (ΔM)	2.48		Spectral class	B8V (blue-white)
Pri motion ra	+002		Sec motion ra
Pri motion dec	-001		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		38592	03 08 10 +40 57 20	CSI 1 Aa1,2	2010	65	43	0.0	2.12			Y
Show		38592	03 08 10 +40 57 20	LAB 2 Aa,Ab	2010	119	304	0.1	2.12	4.60	2.48	Y	<===
Show		38592	03 08 10 +40 57 20	BU 526 AB	2018	12	156	59.4	2.11	12.70	10.59
Show	Algol	38592	03 08 10 +40 57 20	BU 526 AC	2018	12	147	68.6	2.11	12.50	10.39
Show		38592	03 08 10 +40 57 20	BU 526 AD	2018	15	193	82.6	2.11	11.47	9.36
Show		38592	03 08 10 +40 57 20	BU 526 AE	2009	3	186	85.5	2.11	12.50	10.39
Show		38592	03 08 10 +40 57 20	DAL 46 AF	2009	3	111	93.2	2.11	13.70	11.59
Show		38592	03 08 10 +40 57 20	JNN 3 AH	2009	2	206	5.1	2.11	17.10	14.99
Show			03 08 12 +40 56 27	BU 526 BC	2018	12	104	13.7	12.70	12.50	0.20
Show		38592	03 08 08 +40 56 01	BU 526 DE	2018	10	121	10.9	10.50	12.50	2.00
Show			03 08 18 +40 56 46	DAL 46 FG	2015	3	284	6.2	13.70	14.70	1.00

Decuple system
8 estimated visually detectable stars in this system

Common name	Algol		Constellation	Perseus		SAO	38592		HIP	14576
Tycho2	2851-02168-1		Gaia DR2	239863001382455424		HD	19356		HR	936
GC	3733		ADS	2362		BD	BD+40 673		Bayer	Beta Persei
Bayer name	Bet Per		Flamsteed	26 Persei		Flamsteed name	26 Per		FK5	111
Distance	27.57		Distance ly	89.93		Bayer greek	β Per

Period (P)	680.168d	± 0.046	Periastron (T)	46927.22d (1987.358y)	± 0.57	Semi-major axis (a)	93.43m	± 0.11
Eccentricity (e)	0.227	± 0.002	Inclination (i)	83.66°	± 0.03	Longitude of periastron (ω)	310.02°	± 0.26
Node (Ω)	132.66°	± 0.08	Notes	n		Reference	CIA2012b
Equinox			Last observation	2010		Grade	1	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 316.0 0.083 2001-01-01 199.5 0.013 2002-01-01 322.3 0.046 2003-01-01 291.9 0.033 2004-01-01 73.1 0.010 2005-01-01 303.3 0.065 2006-01-01 126.6 0.052 2007-01-01 307.6 0.089 2008-01-01 132.4 0.077 2009-01-01 310.2 0.103 2010-01-01 136.6 0.073 2011-01-01 312.5 0.104 2012-01-01 143.3 0.050 2013-01-01 315.1 0.089 2014-01-01 170.9 0.018 2015-01-01 319.9 0.057 2016-01-01 284.2 0.025 2017-01-01 356.7 0.012 2018-01-01 301.6 0.057 2019-01-01 123.7 0.042 2020-01-01 306.7 0.084 2021-01-01 131.2 0.073 2022-01-01 309.6 0.101 2023-01-01 135.5 0.076 2024-01-01 311.9 0.105 2025-01-01 141.0 0.057 2026-01-01 314.3 0.095 2027-01-01 157.4 0.026 2028-01-01 318.2 0.067 2029-01-01 269.3 0.017 2030-01-01 333.4 0.024		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic