15382+3615 STF1964CD

Coord 2000	15382+3615		Discov num	STF1964		Comp	CD		Coord arcsec 2000	15 38 14.14 +36 14 49.7
Date first	1829		Date last	2016		Obs	56
Pa first	10		Pa last	23		P.A. Now (θ)	19.7°
Sep first	1.4		Sep last	1.7		Sep. Now (ρ)	1.51"
Mag pri	8.06		Mag sec	9.02		delta mag (ΔM)	0.96		Spectral class	F5 (yellow-white)
Pri motion ra	-062		Sec motion ra	-062
Pri motion dec	+043		Sec motion dec	+043
Notes	N O W (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		64821	15382+3615	HU 1167	AB	1905	2015	25	81	1.2	8.07	9.87	1.80	Y
Show		64821	15382+3615	STF1964	AC	1782	2016	78	87	15.1	8.07	8.06	0.01
Show		64821	15382+3615	STF1964	AD	1900	2015	15	81	15.7	8.07	9.02	0.95
Show		64821	15382+3615	STF1964	CD	1829	2016	56	20	1.5	8.06	9.02	0.96	Y	<===
Show		64821	15382+3615	WAK 1	CE	1970	1970	1	82	0.1	8.07	8.20	0.13

Quintuple system
5 visible stars in this system

Constellation	Corona Borealis		SAO	64821		HIP	76566		Tycho2	2577-01755-1
HD	139691		ADS	9731		Distance	27.59		Distance ly	90
last precise pa	22.5		last precise sep	1.73

Period (P)	1230y	± 261	Periastron (T)	1955.3y	± 21.3	Semi-major axis (a)	1.582a	± 0.027
Eccentricity (e)	0		Inclination (i)	78.4°	± 3.8	Longitude of periastron (ω)	0°
Node (Ω)	15.9°	± 1.6	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox			Last observation	1994

label rho theta 2000 1.543 18.6 2001 1.541 18.6 2002 1.539 18.7 2003 1.537 18.8 2004 1.535 18.8 2005 1.533 18.9 2006 1.531 18.9 2007 1.529 19.0 2008 1.527 19.1 2009 1.525 19.1 2010 1.523 19.2 2011 1.521 19.3 2012 1.519 19.3 2013 1.517 19.4 2014 1.514 19.5 2015 1.512 19.5 2016 1.510 19.6 2017 1.507 19.7 2018 1.505 19.7 2019 1.502 19.8 2020 1.500 19.8 2021 1.497 19.9 2022 1.495 20.0 2023 1.492 20.0 2024 1.490 20.1 2025 1.487 20.2 2026 1.484 20.2 2027 1.481 20.3 2028 1.479 20.4 2029 1.476 20.4 2030 1.473 20.5 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
15382+3615	STF1964	CD	2007	43	19	1.4	8.07	9.02		NOD	153812.96+361448.3
15382+3615	STF1964	CD	2008	45	20	1.5	8.07	9.02		NOD	153812.96+361448.3
15382+3615	STF1964	CD	2010	46	20	1.6	8.07	9.02		NOD	153812.96+361448.3
15382+3615	STF1964	CD	2012	49	21	1.5	8.07	9.02		NOD	153814.14+361449.7
15382+3615	STF1964	CD	2015	52	18	1.4	8.06	9.02	F5	NO	153814.14+361449.7
15382+3615	STF1964	CD	2016	56	23	1.7	8.06	9.02	F5	NO	153814.14+361449.7

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