12417-0127 STF1670AB (Porrima)

Coord 2000	12417-0127		Discov num	STF1670		Comp	AB		Coord arcsec 2000	12 41 39.60 -01 26 57.9
Date first	1756		Date last	2020		Obs	1599
Pa first	324		Pa last	4		P.A. Now (θ)	356.2°
Sep first	6.5		Sep last	2.5		Sep. Now (ρ)	3.05"
Mag pri	3.48		Mag sec	3.53		delta mag (ΔM)	0.05		Spectral class	F0V+F0V (yellow-white/yellow-white)
Pri motion ra	-601		Sec motion ra	-534
Pri motion dec	+084		Sec motion dec	-064
Notes	N O (See Notes, Orbital solution)

rPM=0.268 (< 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	Porrima	138917	12 41 40 -01 26 58	STF 1670 AB	2020	1599	356	3.0	3.48	3.53	0.05	Y	<===
Show		138917	12 41 40 -01 26 58	STF 1670 AC	2015	5	121	99.4	3.48	15.10	11.62
Show		138917	12 41 40 -01 26 58	STF 1670 AD	2015	8	90	177.6	3.48	12.05	8.57
Show		138917	12 41 40 -01 26 58	STF 1670 AE	2016	18	167	260.4	3.48	8.94	5.46
Show		138917	12 41 40 -01 26 58	STF 1670 AF	2015	10	267	422.3	3.48	9.53	6.05
Show		138917	12 41 40 -01 26 58	STF 1670 BD	2015	3	90	177.8	3.53	12.05	8.52
Show		138917	12 41 40 -01 26 58	STF 1670 BE	2015	7	167	260.0	3.53	8.94	5.41
Show		138917	12 41 40 -01 26 58	STF 1670 BF	2015	5	268	422.0	3.53	9.53	6.00

Sextuple system
6 visible stars in this system

Precise pa	3.8		Precise sep	2.46		Common name	Porrima		Meaning	Roman goddess of childbirth
Other names	ARICH		Constellation	Virgo		SAO	138917		HIP	61941
Tycho2	4949-01120-1		HD	110379		HR	4825		GC	17270
ADS	8630		GL	Gl 482A		BD	BD-00 2601		Bayer	Gamma Virginis
Bayer name	Gam Vir		Flamsteed	29 Virginis		Flamsteed name	29 Vir		Distance	11.68
Distance ly	38.1		last precise pa	3.8		last precise sep	2.46

Period (P)	169.104y	± 0.011	Periastron (T)	2005.511y	± 0.0019	Semi-major axis (a)	3.639a	± 0.008
Eccentricity (e)	0.8815	± 0.00018	Inclination (i)	149.46°	± 0.16	Longitude of periastron (ω)	255.02°	± 0.37
Node (Ω)	35.34°	± 0.42	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2006

label rho theta 2000 1.493 260.5 2001 1.315 254.7 2002 1.123 246.9 2003 0.912 235.8 2004 0.680 217.4 2005 0.444 179.0 2006 0.409 104.5 2007 0.655 60.1 2008 0.924 41.3 2009 1.168 30.7 2010 1.389 23.7 2011 1.591 18.5 2012 1.777 14.4 2013 1.951 11.1 2014 2.114 8.4 2015 2.268 6.0 2016 2.414 3.9 2017 2.553 2.0 2018 2.685 0.4 2019 2.812 358.8 2020 2.933 357.5 2021 3.050 356.2 2022 3.162 355.0 2023 3.269 353.9 2024 3.373 352.8 2025 3.474 351.9 2026 3.571 350.9 2027 3.664 350.1 2028 3.755 349.2 2029 3.842 348.4 2030 3.927 347.7		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
12417-0127	STF1670	AB	2007	1528	52	0.8	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2009	1535	28	1.2	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2010	1567	21	1.6	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2011	1569	16	1.6	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2012	1575	13	1.7	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2013	1576	10	2.0	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2014	1564	7	2.1	3.48	3.53	F0V F0V	NOD	124139.60-012657.9
12417-0127	STF1670	AB	2015	1574	6	2.3	3.48	3.53	F0V+F0V	NO	124139.60-012657.9
12417-0127	STF1670	AB	2016	1584	3	2.5	3.48	3.53	F0V+F0V	NO	124139.60-012657.9
12417-0127	STF1670	AB	2017	1588	1	2.6	3.48	3.53	F0V+F0V	NO	124139.60-012657.9
12417-0127	STF1670	AB	2018	1591	0	2.7	3.48	3.53	F0V+F0V	NO	124139.60-012657.9
12417-0127	STF1670	AB	2020	1620	357	3.0	3.48	3.53	F0V+F0V	NO	124139.60-012657.9

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