08030-7727 HJ 4068 (Chi Gem)

Coord 2000	08030-7727		Discov num	HJ 4068		Comp			Coord arcsec 2000	08 03 18.43 -77 28 17.5
Date first	1835		Date last	2015		Obs	11
Pa first	300		Pa last	310.7		P.A. Now (θ)	310.7°
Sep first	8.0		Sep last	15.778		Sep. Now (ρ)	15.778"
Mag pri	11.16		Mag sec	11.86		delta mag (ΔM)	0.7		Spectral class
Pri motion ra	+010		Sec motion ra	-003
Pri motion dec	-013		Sec motion dec	+005
Notes

rPM=1.354 This double is not physical.

Name	Chi Gem		Spectr	K2III		Constellation	Chamaeleon		SAO	79896
HIP	39424		Tycho2	9398-02350-1		Gaia DR2	5210011590242239744		HD	66216
HR	3149		GC	10912		BD	BD+28 1532		Bayer	Chi Geminorum
Bayer name	Chi Gem		FK5	305		Distance	78.55		Distance ly	256.23
Bayer greek	χ Gem

Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Gem vs Cha)

Period (P)	2437.8d (6.67y)		Periastron (T)	42894.5d (1976.317y)		Semi-major axis (a)	19.5m	± 2.9
Eccentricity (e)	0.06		Inclination (i)	50.8°	± 8.4	Longitude of periastron (ω)	264°
Node (Ω)	242.6°	± 5.5	Notes			Reference	Jnc2005
Equinox			Last observation	1992		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 347.4 0.013 2001-01-01 41.8 0.018 2002-01-01 77.9 0.018 2003-01-01 141.7 0.012 2004-01-01 217.0 0.017 2005-01-01 253.9 0.019 2006-01-01 298.8 0.014 2007-01-01 9.3 0.015 2008-01-01 53.7 0.019 2009-01-01 92.6 0.016 2010-01-01 172.5 0.012 2011-01-01 230.5 0.019 2012-01-01 265.7 0.018 2013-01-01 321.2 0.013 2014-01-01 26.9 0.016 2015-01-01 65.0 0.019 2016-01-01 112.4 0.013 2017-01-01 197.8 0.014 2018-01-01 242.0 0.020 2019-01-01 279.7 0.016 2020-01-01 345.7 0.013 2021-01-01 40.9 0.018 2022-01-01 77.0 0.018 2023-01-01 139.5 0.012 2024-01-01 215.9 0.016 2025-01-01 253.1 0.019 2026-01-01 297.4 0.015 2027-01-01 7.9 0.014 2028-01-01 52.8 0.019 2029-01-01 91.4 0.016 2030-01-01 170.4 0.012		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Period (P)	1684d (4.61y)	± 630	Periastron (T)	49265d (1993.759y)	± 660	Semi-major axis (a)	19.5m	± 6.5
Eccentricity (e)	0.54	± 0.27	Inclination (i)	68°	± 8	Longitude of periastron (ω)	88°	± 28
Node (Ω)	58°	± 9	Notes			Reference	Gln2007
Equinox			Last observation	1991		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 281.5 0.014 2001-01-01 346.4 0.012 2002-01-01 35.8 0.016 2003-01-01 158.9 0.003 2004-01-01 258.8 0.017 2005-01-01 302.9 0.012 2006-01-01 10.3 0.013 2007-01-01 49.3 0.016 2008-01-01 237.7 0.014 2009-01-01 272.2 0.016 2010-01-01 330.3 0.011 2011-01-01 27.7 0.016 2012-01-01 71.3 0.009 2013-01-01 251.9 0.017 2014-01-01 289.9 0.013 2015-01-01 357.5 0.012 2016-01-01 41.6 0.017 2017-01-01 220.9 0.008 2018-01-01 264.2 0.017 2019-01-01 314.2 0.012 2020-01-01 18.5 0.014 2021-01-01 56.2 0.014 2022-01-01 244.5 0.016 2023-01-01 279.1 0.015 2024-01-01 342.6 0.011 2025-01-01 34.0 0.016 2026-01-01 117.7 0.004 2027-01-01 257.1 0.017 2028-01-01 299.5 0.012 2029-01-01 7.4 0.013 2030-01-01 47.4 0.016		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic