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Current system

14330-4224
HDS2054

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

14330-4224 HDS2054

14^h 32^m 57.08^s -42° 24' 19.5" P.A. 22.00 sep 0.1 mag 8.39,8.89 Sp A7/A8IV dist. 129.03 pc (420.9 l.y.)

Coord 2000	14330-4224		Discov num	HDS2054		Comp			Coord arcsec 2000	14 32 57.08 -42 24 19.5
Date first	1991		Date last	2020		Obs	15
Pa first	1		Pa last	24		P.A. Now (θ)	22°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.1"
Mag pri	8.39		Mag sec	8.89		delta mag (ΔM)	0.5		Spectral class	A7/A8IV (white)
Pri motion ra	-021		Sec motion ra
Pri motion dec	-018		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	24.3		Precise sep	0.099		Constellation	Hydra		SAO	225011
HIP	71140		Tycho2	7814-01676-1		Gaia DR2	6103008619062376192		HD	127498
CD	CD-41 8864		CP	CP-41 6817		Distance	129.03		Distance ly	420.9
last precise pa	24.3		last precise sep	0.099

ORBITAL ELEMENTS

Period (P)	66.5y	± 22.2	Periastron (T)	1997.84y	± 2.36	Semi-major axis (a)	0.207a	± 0.049
Eccentricity (e)	0.8		Inclination (i)	97.5°	± 1.6	Longitude of periastron (ω)	116°	± 6
Node (Ω)	356.7°	± 2.2	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label	rho	theta
2000	0.070	171.4
2001	0.072	167.9
2002	0.069	164.2
2003	0.065	160.2
2004	0.059	155.5
2005	0.053	149.7
2006	0.047	142.5
2007	0.042	133.2
2008	0.037	121.5
2009	0.035	107.4
2010	0.034	91.9
2011	0.036	77.1
2012	0.040	64.4
2013	0.045	54.2
2014	0.051	46.4
2015	0.058	40.3
2016	0.065	35.5
2017	0.073	31.7
2018	0.080	28.6
2019	0.088	26.0
2020	0.095	23.9
2021	0.103	22.0
2022	0.110	20.4
2023	0.117	19.0
2024	0.124	17.7
2025	0.131	16.6
2026	0.138	15.6
2027	0.144	14.7
2028	0.151	13.9
2029	0.157	13.1
2030	0.163	12.4

grafico orbita

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

wds14330-4224e.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
14330-4224	HDS2054		1991	1	1	0.2	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2009	3	108	0.0	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2013	4	234	0.0	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2014	5	44	0.1	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2015	6	39	0.1	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2017	12	31	0.1	8.39	8.89	A7/A8IV		143257.08-422419.5
14330-4224	HDS2054		2018	13	29	0.1	8.39	8.89	A7/A8IV	O	143257.08-422419.5
14330-4224	HDS2054		2019	14	26	0.1	8.39	8.89	A7/A8IV	O	143257.08-422419.5

If you need more information about this double, apply for a data request form to the WDS.