01528-0447 RST4188

Coord 2000	01528-0447		Discov num	RST4188		Comp			Coord arcsec 2000	01 52 45.64 -04 47 15.9
Date first	1939		Date last	2016		Obs	24
Pa first	302		Pa last	42		P.A. Now (θ)	46.3°
Sep first	0.2		Sep last	0.4		Sep. Now (ρ)	0.33"
Mag pri	9.95		Mag sec	10.02		delta mag (ΔM)	0.07		Spectral class	G0 (yellow)
Pri motion ra	+010		Sec motion ra	+010
Pri motion dec	-022		Sec motion dec	-022
Notes	O (Orbital solution)

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

Precise pa	42.2		Precise sep	0.351		Constellation	Cetus		Tycho2	4688-00919-1
Gaia DR2	69041723776		HD	11488		last precise pa	42.2		last precise sep	0.351

Period (P)	618.71y		Periastron (T)	2619.26y		Semi-major axis (a)	1.048a
Eccentricity (e)	0.553		Inclination (i)	72.1°		Longitude of periastron (ω)	10.9°
Node (Ω)	22.7°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.463 25.7 2001 0.459 26.4 2002 0.455 27.2 2003 0.451 28.0 2004 0.446 28.8 2005 0.441 29.7 2006 0.436 30.5 2007 0.430 31.4 2008 0.424 32.3 2009 0.417 33.2 2010 0.410 34.2 2011 0.403 35.2 2012 0.395 36.2 2013 0.387 37.2 2014 0.379 38.4 2015 0.371 39.5 2016 0.362 40.7 2017 0.354 42.0 2018 0.345 43.4 2019 0.336 44.8 2020 0.327 46.3 2021 0.318 47.8 2022 0.309 49.5 2023 0.300 51.3 2024 0.291 53.1 2025 0.282 55.1 2026 0.273 57.3 2027 0.265 59.5 2028 0.257 61.9 2029 0.249 64.5 2030 0.241 67.2 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
01528-0447	RST4188		2001	19	26	0.4	9.95	10.02	G0	NO	015245.64-044715.9
01528-0447	RST4188		2008	20	33	0.4	9.95	10.02	G0	NO	015245.64-044715.9
01528-0447	RST4188		2014	22	41	0.4	9.95	10.02	G0	O	015245.64-044715.9
01528-0447	RST4188		2016	24	42	0.4	9.95	10.02	G0	O	015245.64-044715.9

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