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00015+3044
HO 208

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

00015+3044 HO 208

00^h 01^m 29.19^s +30° 44' 08.7" P.A. 185.30 sep 1.0 mag 8.20,9.81 Sp G0IV dist. 117.79 pc (384.23 l.y.)

Coord 2000	00015+3044		Discov num	HO 208		Comp			Coord arcsec 2000	00 01 29.19 +30 44 08.7
Date first	1884		Date last	2016		Obs	42
Pa first	236		Pa last	186		P.A. Now (θ)	185.3°
Sep first	0.7		Sep last	1.1		Sep. Now (ρ)	1.02"
Mag pri	8.20		Mag sec	9.81		delta mag (ΔM)	1.61		Spectral class	G0IV (yellow)
Pri motion ra	-010		Sec motion ra	-010
Pri motion dec	-040		Sec motion dec	-040
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	185.6		Precise sep	1.108		Constellation	Hydra		SAO	73691
HIP	114		Tycho2	2259-01286-1		Gaia DR2	2873358345368401792		HD	224882
ADS	17167		BD	BD+29 5046		Distance	117.79		Distance ly	384.23
last precise pa	185.6		last precise sep	1.108

ORBITAL ELEMENTS

Period (P)	649.641y	± 319.4783	Periastron (T)	2054.9367y	± 19.0547	Semi-major axis (a)	2.20987a	± 1.67551
Eccentricity (e)	0.77651	± 0.18187	Inclination (i)	103.903°	± 8.166	Longitude of periastron (ω)	76.124°	± 12.674
Node (Ω)	175.491°	± 5.153	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox			Last observation	2015

label	rho	theta
2000	1.086	193.0
2001	1.086	192.6
2002	1.085	192.3
2003	1.084	191.9
2004	1.082	191.6
2005	1.081	191.2
2006	1.079	190.9
2007	1.077	190.5
2008	1.075	190.2
2009	1.072	189.8
2010	1.070	189.5
2011	1.067	189.1
2012	1.063	188.7
2013	1.060	188.4
2014	1.056	188.0
2015	1.051	187.6
2016	1.047	187.3
2017	1.042	186.9
2018	1.036	186.5
2019	1.030	186.1
2020	1.024	185.7
2021	1.017	185.3
2022	1.010	184.9
2023	1.002	184.5
2024	0.994	184.1
2025	0.985	183.7
2026	0.976	183.3
2027	0.965	182.8
2028	0.954	182.4
2029	0.943	181.9
2030	0.930	181.5

grafico orbita

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

wds00015%2B3044a.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
00015+3044	HO 208		2002	33	191	1.1	8.20	9.81	G0IV	D	000129.19+304408.7
00015+3044	HO 208		2009	34	188	1.2	8.20	9.81	G0IV	D	000129.19+304408.7
00015+3044	HO 208		2013	38	187	1.0	8.20	9.81	G0IV		000129.19+304408.7
00015+3044	HO 208		2015	39	186	1.1	8.20	9.81	G0IV		000129.19+304408.7
00015+3044	HO 208		2016	40	186	1.1	8.20	9.81	G0IV	O	000129.19+304408.7

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