10282-2548 FIN 308AB

Coord 2000	10282-2548		Discov num	FIN 308		Comp	AB		Coord arcsec 2000	10 28 10.54 -25 48 26.4
Date first	1936		Date last	2016		Obs	20
Pa first	68		Pa last	350		P.A. Now (θ)	144.4°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.05"
Mag pri	9.14		Mag sec	9.68		delta mag (ΔM)	0.54		Spectral class	G3V (yellow)
Pri motion ra	-062		Sec motion ra
Pri motion dec	+028		Sec motion dec
Notes	N O (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		178853	10282-2548	FIN 308	AB	1936	2016	20	144	0.0	9.14	9.68	0.54	Y	<===
Show		178853	10282-2548	B 199	AB,C	1927	2016	17	173	1.1	8.56	12.41	3.85

Triple system
4 visible stars in this system

Precise pa	350.3		Precise sep	0.086		Constellation	Hydra		SAO	178853
HIP	51255		Tycho2	6624-00602-1		Gaia DR2	5469406625417045760		HD	90737
ADS	7787		CD	CD-25 8055		CP	CP-25 4584		Distance	89.13
Distance ly	290.74		last precise pa	350.3		last precise sep	0.086

Period (P)	32.76y	± 2.67	Periastron (T)	2018.13y	± 1.28	Semi-major axis (a)	0.144a	± 0.033
Eccentricity (e)	0.739	± 0.135	Inclination (i)	48.6°	± 16.2	Longitude of periastron (ω)	270.6°	± 2.7
Node (Ω)	155.4°	± 4.5	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.165 239.8 2001 0.165 243.5 2002 0.166 247.2 2003 0.165 250.9 2004 0.165 254.7 2005 0.163 258.4 2006 0.162 262.3 2007 0.159 266.2 2008 0.156 270.3 2009 0.153 274.5 2010 0.148 279.0 2011 0.143 283.8 2012 0.136 289.0 2013 0.128 294.8 2014 0.118 301.5 2015 0.105 309.6 2016 0.087 320.6 2017 0.061 339.0 2018 0.026 45.6 2019 0.053 144.4 2020 0.081 167.4 2021 0.100 179.6 2022 0.114 188.5 2023 0.125 195.6 2024 0.133 201.7 2025 0.140 207.1 2026 0.146 212.1 2027 0.151 216.7 2028 0.154 221.1 2029 0.158 225.2 2030 0.160 229.2 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
10282-2548	FIN 308	AB	1993	11	212	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2009	12	95	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2010	13	103	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2012	14	109	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2013	15	294	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2014	17	308	0.1	9.68	9.14	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2015	19	323	0.1	9.14	9.68	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2016	20	350	0.1	9.14	9.68	G3V	NO	102810.54-254826.4

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