02424+3837 EVT   1Aa,Ab

Coord 2000	02424+3837		Discov num	EVT   1		Comp	Aa,Ab		Coord arcsec 2000	02 42 21.31 +38 37 07.2
Date first	2008		Date last	2009		Obs	6
Pa first	46		Pa last	290		P.A. Now (θ)	290°
Sep first	0.0		Sep last	0.0		Sep. Now (ρ)	0"
Mag pri	7.11		Mag sec	10.00		delta mag (ΔM)	2.89		Spectral class	G5 (yellow)
Pri motion ra	+077		Sec motion ra
Pri motion dec	-108		Sec motion dec
Notes	N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)

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

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		55798	02 42 21 +38 37 07	EVT 1 Aa,Ab	2009	6	290	0.0	7.11	10.00	2.89	Y	<===
Show		55798	02 42 21 +38 37 07	AG 49 AB	2019	25	344	14.3	8.84	10.38	1.54

Triple system
2 visible stars in this system

Precise pa	290.2		Precise sep	0.025		Constellation	Perseus		SAO	55798
HIP	12638		Tycho2	2845-02243-1		Gaia DR2	334156706263100416		HD	16760
BD	BD+37 604		Distance	45.45		Distance ly	148.26		last precise pa	290.2
last precise sep	0.025

Period (P)	466.5d	± 0.4	Periastron (T)	53336.5m (2004.908y)	± 3	Semi-major axis (a)	25.5m	± 2.8
Eccentricity (e)	0.084	± 0.003	Inclination (i)	2.6°	± 0.5	Longitude of periastron (ω)	243°	± 2
Node (Ω)	86.9°	± 1.1	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox			Last observation	2009

label rho theta 2000 0.024 35.1 2001 0.024 304.5 2002 0.026 221.0 2003 0.028 151.8 2004 0.026 83.0 2005 0.024 0.5 2006 0.024 269.6 2007 0.027 192.7 2008 0.027 125.6 2009 0.025 52.8 2010 0.023 324.2 2011 0.025 237.4 2012 0.028 166.0 2013 0.027 98.5 2014 0.024 19.6 2015 0.024 288.3 2016 0.026 207.9 2017 0.028 139.9 2018 0.026 69.6 2019 0.023 344.1 2020 0.025 254.6 2021 0.027 180.4 2022 0.027 113.4 2023 0.025 38.0 2024 0.023 307.7 2025 0.026 223.6 2026 0.028 154.1 2027 0.026 85.6 2028 0.024 3.7 2029 0.024 272.6 2030 0.027 195.2		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
02424+3837	EVT 1	Aa,Ab	2009	6	290	0.0	7.11	10.00	G5	O K	024221.31+383707.2

If you need more information about this double, apply for a data request form to the WDS.