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00167+3629
STT 4

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

00167+3629 STT 4

00^h 16^m 44.54^s +36° 29' 29.4" P.A. 322.50 sep 0.2 mag 7.94,9.88 Sp G0 dist. 78 pc (254.44 l.y.)

Coord 2000	00167+3629		Discov num	STT 4		Comp			Coord arcsec 2000	00 16 44.54 +36 29 29.4
Date first	1845		Date last	2011		Obs	156
Pa first	201		Pa last	70		P.A. Now (θ)	322.5°
Sep first	0.5		Sep last	0.2		Sep. Now (ρ)	0.18"
Mag pri	7.94		Mag sec	9.88		delta mag (ΔM)	1.94		Spectral class	G0 (yellow)
Pri motion ra	+093		Sec motion ra	+093
Pri motion dec	+053		Sec motion dec	+053
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	70.2		Precise sep	0.18		Constellation	Hydra		SAO	53773
HIP	1336		Tycho2	2272-01489-1		Gaia DR2	2876640215778437504		HD	1224
ADS	221		BD	BD+35 34		Distance	78		Distance ly	254.44
last precise pa	70.2		last precise sep	0.18

ORBITAL ELEMENTS

Period (P)	108.9y		Periastron (T)	1907.9y		Semi-major axis (a)	0.35a
Eccentricity (e)	0.56		Inclination (i)	162.5°		Longitude of periastron (ω)	356.3°
Node (Ω)	10.8°		Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox			Last observation	1999

label	rho	theta
2000	0.331	137.8
2001	0.319	134.8
2002	0.307	131.5
2003	0.294	128.0
2004	0.281	124.1
2005	0.268	119.9
2006	0.255	115.2
2007	0.241	110.0
2008	0.228	104.2
2009	0.215	97.7
2010	0.203	90.3
2011	0.191	82.0
2012	0.180	72.7
2013	0.171	62.3
2014	0.163	50.7
2015	0.158	38.3
2016	0.155	25.1
2017	0.154	11.6
2018	0.156	358.3
2019	0.160	345.5
2020	0.167	333.5
2021	0.175	322.5
2022	0.185	312.7
2023	0.196	303.8
2024	0.208	296.0
2025	0.220	289.0
2026	0.233	282.8
2027	0.246	277.2
2028	0.259	272.2
2029	0.272	267.7
2030	0.285	263.5

grafico orbita

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

wds00167%2B3629b.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
00167+3629	STT 4		2007	154	103	0.3	7.94	9.88	G0	NOD	001644.54+362929.4

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