01028+0214 A  2308

Coord 2000	01028+0214		Discov num	A  2308		Comp			Coord arcsec 2000	01 02 45.24 +02 13 41.6
Date first	1910		Date last	2019		Obs	34
Pa first	338		Pa last	306		P.A. Now (θ)	122.4°
Sep first	0.3		Sep last	0.4		Sep. Now (ρ)	0.41"
Mag pri	9.87		Mag sec	11.73		delta mag (ΔM)	1.86		Spectral class	G5 (yellow)
Pri motion ra	+116		Sec motion ra
Pri motion dec	-008		Sec motion dec
Notes	O (Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Precise pa	305.9		Precise sep	0.398		Constellation	Cetus		HIP	4886
Tycho2	0019-00158-1		Gaia DR2	01095832576		ADS	864		BD	BD+01 194
Distance	111.23		Distance ly	362.83		last precise pa	305.9		last precise sep	0.398

Period (P)	141.8y	± 5.52	Periastron (T)	1958.95y	± 4.96	Semi-major axis (a)	0.367a	± 0.006
Eccentricity (e)	0.124	± 0.025	Inclination (i)	62.9°	± 2.2	Longitude of periastron (ω)	10.5°	± 13.9
Node (Ω)	306.6°	± 1.7	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.273 96.2 2001 0.282 98.2 2002 0.292 100.1 2003 0.301 101.9 2004 0.310 103.5 2005 0.319 105.1 2006 0.327 106.6 2007 0.335 108.0 2008 0.343 109.4 2009 0.350 110.6 2010 0.357 111.9 2011 0.364 113.1 2012 0.370 114.2 2013 0.376 115.3 2014 0.382 116.4 2015 0.387 117.4 2016 0.391 118.5 2017 0.395 119.5 2018 0.399 120.4 2019 0.402 121.4 2020 0.405 122.4 2021 0.407 123.3 2022 0.409 124.2 2023 0.410 125.1 2024 0.411 126.1 2025 0.412 127.0 2026 0.412 127.9 2027 0.411 128.8 2028 0.410 129.7 2029 0.409 130.6 2030 0.407 131.6 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01028+0214	A 2308		1991	30	232	0.2	9.87	11.73	G5	NO	010245.24+021341.6
01028+0214	A 2308		2008	31	288	0.4	9.87	11.73	G5	NO	010245.24+021341.6
01028+0214	A 2308		2010	32	292	0.4	9.87	11.73	G5	NO	010245.24+021341.6
01028+0214	A 2308		2014	33	299	0.4	9.87	11.73	G5	O	010245.24+021341.6
01028+0214	A 2308		2019	34	306	0.4	9.87	11.73	G5	O	010245.24+021341.6

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