03342+4837 BU  787AB

Coord 2000	03342+4837		Discov num	BU  787		Comp	AB		Coord arcsec 2000	03 34 12.97 +48 37 02.9
Date first	1881		Date last	2016		Obs	18
Pa first	229		Pa last	293		P.A. Now (θ)	294.3°
Sep first	2.1		Sep last	5.2		Sep. Now (ρ)	4.8"
Mag pri	7.38		Mag sec	11.90		delta mag (ΔM)	4.52		Spectral class	B9.5V (blue-white)
Pri motion ra	+023		Sec motion ra
Pri motion dec	-027		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		38946	03342+4837	BU 787	AB	1881	2016	18	294	4.8	7.38	11.90	4.52	Y	<===
Show		38946	03342+4837	BU 787	AD	1898	2016	11	181	34.5	7.38	11.75	4.37
Show		38946	03342+4837	ARN 57	AE	1903	2015	11	29	175.2	7.38	8.81	1.43

Quadruple system
4 visible stars in this system

Precise pa	293.1		Precise sep	5.17		Constellation	Perseus		SAO	38946
HIP	16649		Tycho2	3317-00589-1		Gaia DR2	249282105184992384		HD	21931
ADS	2609		BD	BD+48 949		Distance	261.1		Distance ly	851.71
last precise pa	293.1		last precise sep	5.17

Period (P)	655.8y	± 27.3	Periastron (T)	2264.9y	± 13.5	Semi-major axis (a)	4.99a	± 1.78
Eccentricity (e)	0.261	± 0.93	Inclination (i)	70°	± 2.7	Longitude of periastron (ω)	291.6°	± 10.9
Node (Ω)	130.5°	± 0.9	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2010

label rho theta 2000 4.459 290.3 2001 4.478 290.5 2002 4.497 290.8 2003 4.516 291.0 2004 4.535 291.2 2005 4.553 291.4 2006 4.572 291.6 2007 4.590 291.9 2008 4.608 292.1 2009 4.626 292.3 2010 4.644 292.5 2011 4.662 292.7 2012 4.679 292.9 2013 4.696 293.1 2014 4.714 293.3 2015 4.731 293.5 2016 4.747 293.7 2017 4.764 293.9 2018 4.780 294.1 2019 4.796 294.3 2020 4.812 294.5 2021 4.828 294.7 2022 4.844 294.9 2023 4.859 295.1 2024 4.874 295.3 2025 4.889 295.5 2026 4.904 295.7 2027 4.919 295.8 2028 4.933 296.0 2029 4.947 296.2 2030 4.961 296.4 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
03342+4837	BU 787	AB	1999	16	288	4.5	7.38	11.90	B9.5V	NOD	033412.97+483702.9
03342+4837	BU 787	AB	2010	17	291	4.7	7.38	11.90	B9.5V	NOD	033412.97+483702.9
03342+4837	BU 787	AB	2016	18	293	5.2	7.38	11.90	B9.5V	NO	033412.97+483702.9

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