19406+6240 STF2574

Coord 2000	19406+6240		Discov num	STF2574		Comp			Coord arcsec 2000	19 40 34.80 +62 39 53.4
Date first	1831		Date last	2018		Obs	97
Pa first	314		Pa last	97		P.A. Now (θ)	97.7°
Sep first	1.5		Sep last	0.5		Sep. Now (ρ)	0.54"
Mag pri	7.73		Mag sec	8.91		delta mag (ΔM)	1.18		Spectral class	F8V (yellow-white)
Pri motion ra	+026		Sec motion ra	+026
Pri motion dec	+111		Sec motion dec	+111
Notes	O (Orbital solution)

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

Precise pa	96.5		Precise sep	0.534		Constellation	Draco		SAO	18469
HIP	96796		Tycho2	4234-01631-1		HD	186453		ADS	12803
BD	BD+62 1747		Distance	128.53		Distance ly	419.26		last precise pa	96.5
last precise sep	0.534

Period (P)	685.13y		Periastron (T)	2057.26y		Semi-major axis (a)	1.302a
Eccentricity (e)	0.67		Inclination (i)	78.9°		Longitude of periastron (ω)	48.2°
Node (Ω)	107.6°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1999

label rho theta 2000 0.467 87.8 2001 0.472 88.4 2002 0.477 89.0 2003 0.481 89.5 2004 0.486 90.1 2005 0.491 90.6 2006 0.495 91.1 2007 0.499 91.7 2008 0.503 92.2 2009 0.507 92.7 2010 0.511 93.2 2011 0.515 93.6 2012 0.519 94.1 2013 0.522 94.6 2014 0.526 95.0 2015 0.529 95.5 2016 0.532 96.0 2017 0.535 96.4 2018 0.538 96.8 2019 0.540 97.3 2020 0.542 97.7 2021 0.544 98.1 2022 0.546 98.6 2023 0.547 99.0 2024 0.549 99.4 2025 0.549 99.8 2026 0.550 100.3 2027 0.550 100.7 2028 0.550 101.1 2029 0.550 101.5 2030 0.549 102.0 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
19406+6240	STF2574		1999	91	88	0.5	7.73	8.91	F8V	D	194034.80+623953.4
19406+6240	STF2574		2007	93	88	0.5	7.73	8.91	F8V	OD	194034.80+623953.4
19406+6240	STF2574		2009	94	90	0.5	7.73	8.91	F8V	OD	194034.80+623953.4
19406+6240	STF2574		2016	96	94	0.6	7.73	8.91	F8V	O	194034.80+623953.4
19406+6240	STF2574		2018	97	97	0.5	7.73	8.91	F8V	O	194034.80+623953.4

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