16163-1836 HDS 2299 (HD 146312)

16^h 16^m 20.41^s -18° 35' 55.0" P.A. 312.00 sep 0.1 mag 8.57,10.68 Sp G1/G2V dist. 148.59 pc (484.7 l.y.)

Coord 2000	16163-1836		Discov num	HDS2299		Comp			Coord arcsec 2000	16 16 20.41 -18 35 55.0
Date first	1991		Date last	2021		Obs	7
Pa first	125		Pa last	312.4		P.A. Now (θ)	312.4°
Sep first	0.2		Sep last	0.119		Sep. Now (ρ)	0.119"
Mag pri	8.57		Mag sec	10.68		delta mag (ΔM)	2.11		Spectral class	G1/G2V (yellow)
Pri motion ra	+022		Sec motion ra
Pri motion dec	-048		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 146312		Constellation	Scorpius		SAO	159823		HIP	79732
Tycho2	6206-01220-1		Gaia DR2	6246221451687292032		HD	146312		BD	BD-18 4252
Distance	148.59		Distance ly	484.7

ORBITAL ELEMENTS

Period (P)	70y		Periastron (T)	2027.3y		Semi-major axis (a)	0.184a
Eccentricity (e)	0.4		Inclination (i)	96.5°		Longitude of periastron (ω)	220.6°
Node (Ω)	129.6°		Notes			Reference	Tok2019d
Equinox	2000		Last observation	2019		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	118.7	0.128
2001	117.5	0.118
2002	116.1	0.106
2003	114.3	0.095
2004	112.0	0.083
2005	109.0	0.072
2006	104.8	0.060
2007	98.5	0.048
2008	88.6	0.038
2009	71.6	0.029
2010	44.1	0.024
2011	13.2	0.026
2012	351.6	0.033
2013	339.0	0.043
2014	331.4	0.055
2015	326.3	0.066
2016	322.8	0.077
2017	320.1	0.088
2018	318.0	0.097
2019	316.2	0.106
2020	314.7	0.113
2021	313.4	0.118
2022	312.1	0.121
2023	310.9	0.122
2024	309.7	0.119
2025	308.3	0.112
2026	306.8	0.102
2027	304.8	0.089
2028	302.0	0.072
2029	297.3	0.053
2030	287.0	0.033

grafico orbita

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

wds16163-1836a.png orbit plot

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