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10282-2548
FIN 308AB

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

10282-2548 FIN 308AB

10^h 28^m 10.54^s -25° 48' 26.4" P.A. 179.60 sep 0.1 mag 9.14,9.68 Sp G3V dist. 89.13 pc (290.74 l.y.)

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	2020		Obs	22
Pa first	68		Pa last	182		P.A. Now (θ)	179.6°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.1"
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.

10282-2548 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		178853	10 28 11 -25 48 26	FIN 308 AB	2020	22	180	0.1	9.14	9.68	0.54	Y	<===
Show		178853	10 28 11 -25 48 26	B 199 AB,C	2020	24	174	1.2	8.56	12.41	3.85

Triple system
4 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	181.8		Precise sep	0.103		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	181.8		last precise sep	0.103

ORBITAL ELEMENTS

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

grafico orbita

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

wds10282-2548a.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS HISTORIC DATA

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
10282-2548	FIN 308	AB	2018	21	145	0.0	9.14	9.68	G3V	NO	102810.54-254826.4
10282-2548	FIN 308	AB	2019	22	168	1.1	9.14	9.68	G3V	NO	102810.54-254826.4

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