14410+5757 STF 1872 AB (HD 129580)

Coord 2000	14410+5757		Discov num	STF1872		Comp	AB		Coord arcsec 2000	14 41 00.84 +57 57 28.1
Date first	1830		Date last	2019		Obs	118
Pa first	308		Pa last	50.2		P.A. Now (θ)	50.2°
Sep first	8.1		Sep last	7.41		Sep. Now (ρ)	7.41"
Mag pri	7.53		Mag sec	8.32		delta mag (ΔM)	0.79		Spectral class	K0 (yellow-orange)
Pri motion ra	+139		Sec motion ra	+144
Pri motion dec	-162		Sec motion dec	-167
Notes	N O V (See Notes, Orbital solution, Proper motion indicates physical)

rPM=0.032 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 129580	29244	14 41 01 +57 57 28	STF 1872 AB	2019	118	50	7.4	7.53	8.32	0.79	Y	<===
Show		29244	14 41 01 +57 57 28	STF 1872 AC	2015	16	42	75.7	7.53	10.61	3.08

Triple system
3 estimated visually detectable stars in this system

Name	HD 129580		Constellation	Draco		SAO	29244		HIP	71782
Tycho2	3866-01308-1		Gaia DR2	1616867690147963392		HD	129580		GC	19799
ADS	9346		BD	BD+58 1523		Distance	55.46		Distance ly	180.91

Period (P)	20.35c	± 12.8	Periastron (T)	2887.7y	± 895.5	Semi-major axis (a)	5.23a	± 2.01
Eccentricity (e)	0.46	± 0.24	Inclination (i)	19.4°	± 6.2	Longitude of periastron (ω)	357°	± 18
Node (Ω)	222°	± 18	Notes	n		Reference	Kiy2010
Equinox			Last observation			Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000 48.3 7.539 2001 48.3 7.538 2002 48.4 7.536 2003 48.5 7.535 2004 48.6 7.533 2005 48.6 7.532 2006 48.7 7.530 2007 48.8 7.528 2008 48.8 7.527 2009 48.9 7.525 2010 49.0 7.524 2011 49.1 7.522 2012 49.1 7.520 2013 49.2 7.519 2014 49.3 7.517 2015 49.3 7.515 2016 49.4 7.513 2017 49.5 7.512 2018 49.6 7.510 2019 49.6 7.508 2020 49.7 7.506 2021 49.8 7.505 2022 49.8 7.503 2023 49.9 7.501 2024 50.0 7.499 2025 50.1 7.497 2026 50.1 7.496 2027 50.2 7.494 2028 50.3 7.492 2029 50.3 7.490 2030 50.4 7.488		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic