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Doubles in session

Current system

03082+4057
CSI 1 Aa1,2

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

03082+4057 CSI 1 Aa1,2

03^h 08^m 10.13^s +40° 57' 20.3" P.A. 43.00 sep 0.0 mag 2.12, Sp B8V dist. 27.57 pc (89.93 l.y.)

Coord 2000	03082+4057		Discov num	CSI 1		Comp	Aa1,2		Coord arcsec 2000	03 08 10.13 +40 57 20.3
Date first	2006		Date last	2010		Obs	65
Pa first	41		Pa last	43		P.A. Now (θ)	43°
Sep first	0.0		Sep last	0.002		Sep. Now (ρ)	0.002"
Mag pri	2.12		Mag sec			delta mag (ΔM)			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.

03082+4057 SYSTEM COMPONENTS

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

OTHER CATALOGS AND DESIGNATIONS

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

Other names

ALGHOUL, GORGONA, GORGONEA PRIMA, DEMON STAR

Meaning

ogre, monster

SUSPECTED ORBITAL ELEMENTS

Identifier	03082+4057
coord_arcsec_2000	030810.13+405720.3

Period (P)	2.867328d	± 0.00005	Periastron (T)	41771.353d (1973.242y)	± 0.007	Semi-major axis (a)	2.15m	± 0.05
Eccentricity (e)	0	± 0	Inclination (i)	98.7°	± 0.65	Longitude of periastron (ω)	270°	± 0
Node (Ω)	43.43°	± 0.32	Notes	n		Reference	CIA2012b
Equinox			Last observation	2010		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	17.3	0.001
2001-01-01	218.5	0.002
2002-01-01	45.4	0.002
2003-01-01	236.1	0.001
2004-01-01	179.7
2005-01-01	36.7	0.002
2006-01-01	224.2	0.002
2007-01-01	52.9	0.001
2008-01-01	318.7
2009-01-01	214.5	0.002
2010-01-01	42.9	0.002
2011-01-01	230.6	0.002
2012-01-01	92.8
2013-01-01	31.5	0.001
2014-01-01	221.7	0.002
2015-01-01	48.7	0.002
2016-01-01	251.9	0.001
2017-01-01	207.2	0.001
2018-01-01	40.3	0.002
2019-01-01	227.2	0.002
2020-01-01	62.4	0.001
2021-01-01	20.0	0.001
2022-01-01	218.9	0.002
2023-01-01	45.8	0.002
2024-01-01	237.1	0.001
2025-01-01	185.6	0.001
2026-01-01	37.2	0.002
2027-01-01	224.5	0.002
2028-01-01	53.6	0.001
2029-01-01	331.6
2030-01-01	215.1	0.002

grafico orbita

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

wds03082%2B4057a.png orbit plot

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