20182+2912 A  1205

Coord 2000	20182+2912		Discov num	A  1205		Comp			Coord arcsec 2000	20 18 13.44 +29 12 15.0
Date first	1905		Date last	2018		Obs	64
Pa first	346		Pa last	96		P.A. Now (θ)	96.5°
Sep first	0.3		Sep last	1.2		Sep. Now (ρ)	1.25"
Mag pri	9.17		Mag sec	10.08		delta mag (ΔM)	0.91		Spectral class	M0 (red)
Pri motion ra	-006		Sec motion ra	-006
Pri motion dec	-087		Sec motion dec	-087
Notes	O (Orbital solution)

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

Precise pa	96		Precise sep	1.232		Constellation	Vulpecula		SAO	88492
HIP	100079		Tycho2	2167-01052-1		Gaia DR2	76179555712		HD	334100
ADS	13665		BD	BD+28 3698		Distance	34.72		Distance ly	113.26
last precise pa	96		last precise sep	1.232

Period (P)	493.2y		Periastron (T)	1970.78y		Semi-major axis (a)	1.942a
Eccentricity (e)	0.913		Inclination (i)	98.1°		Longitude of periastron (ω)	74°
Node (Ω)	285.72°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2005

label rho theta 2000 1.038 98.8 2001 1.052 98.7 2002 1.066 98.6 2003 1.079 98.4 2004 1.091 98.3 2005 1.104 98.2 2006 1.115 98.0 2007 1.127 97.9 2008 1.138 97.8 2009 1.149 97.7 2010 1.160 97.5 2011 1.170 97.4 2012 1.180 97.3 2013 1.189 97.2 2014 1.199 97.1 2015 1.208 97.0 2016 1.217 96.9 2017 1.225 96.8 2018 1.234 96.7 2019 1.242 96.6 2020 1.250 96.5 2021 1.257 96.4 2022 1.265 96.3 2023 1.272 96.2 2024 1.279 96.1 2025 1.286 96.0 2026 1.293 95.9 2027 1.299 95.8 2028 1.305 95.7 2029 1.312 95.6 2030 1.317 95.5 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
20182+2912	A 1205		2007	55	98	1.1	9.17	10.08	M0	NOD	201813.44+291215.0
20182+2912	A 1205		2009	56	98	1.1	9.17	10.08	M0	NOD	201813.44+291215.0
20182+2912	A 1205		2010	57	97	1.2	9.17	10.08	M0	NOD	201813.44+291215.0
20182+2912	A 1205		2016	60	96	1.2	9.17	10.08	M0	O	201813.44+291215.0
20182+2912	A 1205		2017	62	97	1.2	9.17	10.08	M0	O	201813.44+291215.0
20182+2912	A 1205		2018	63	96	1.2	9.17	10.08	M0	O	201813.44+291215.0

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