12283-6146 RST 4499 BC

Coord 2000	12283-6146		Discov num	RST4499		Comp	BC		Coord arcsec 2000	12 28 16.80 -61 45 58.5
Date first	1939		Date last	2021		Obs	24
Pa first	358		Pa last	31.5		P.A. Now (θ)	6.9°
Sep first	0.4		Sep last	0.184		Sep. Now (ρ)	0.204"
Mag pri	8.80		Mag sec	8.80		delta mag (ΔM)	0		Spectral class	G3V (yellow)
Pri motion ra	+100		Sec motion ra	+083
Pri motion dec	-170		Sec motion dec	-150
Notes	N O (See Notes, Orbital solution)

rPM=0.133 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 108500	251919	12 28 17 -61 45 56	CPO 12 A,BC	2021	54	184	2.2	7.32	8.24	0.92	Y
Show		251919	12 28 17 -61 45 56	RST 4499 AD	2016	5	331	7.9	7.32	13.70	6.38
Show			12 28 17 -61 45 58	RST 4499 BC	2021	24	32	0.2	8.80	8.80	0.00	Y	<===

Quadruple system
5 estimated visually detectable stars in this system

Constellation	Crux		HIP	60845		Tycho2	8975-03266-2		Gaia DR2	6054954738289909632
HD	108500		CP	CP-61 3204		Distance	48.38		Distance ly	157.82

Period (P)	28.2y	± 0.2	Periastron (T)	1990.2y	± 0.3	Semi-major axis (a)	0.221a	± 0.003
Eccentricity (e)	0.166	± 0.009	Inclination (i)	156.1°	± 2.5	Longitude of periastron (ω)	77.3°	± 5.9
Node (Ω)	162.8°	± 6.5	Notes			Reference	Tok2018h
Equinox	2000		Last observation	2018		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 309.0 0.238 2001 299.2 0.240 2002 289.4 0.239 2003 279.6 0.239 2004 269.7 0.237 2005 259.6 0.236 2006 249.4 0.234 2007 239.0 0.232 2008 228.5 0.231 2009 217.9 0.229 2010 207.0 0.226 2011 195.9 0.223 2012 184.4 0.219 2013 172.4 0.213 2014 159.5 0.205 2015 145.6 0.196 2016 130.2 0.186 2017 113.1 0.177 2018 94.4 0.171 2019 74.8 0.169 2020 55.5 0.173 2021 37.4 0.181 2022 21.3 0.192 2023 6.9 0.204 2024 354.0 0.214 2025 342.3 0.223 2026 331.4 0.230 2027 321.0 0.235 2028 311.0 0.238 2029 301.2 0.239 2030 291.4 0.240		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

discov_num	notes	refcode
CPO 12	A,BC: A is SB, no orbit. AD can be physical. Moved by 1"in 40y (WDS),
	while the PM implied 6" motion.	Tok2014d

refcode	metd	author	reference
Tok2014d	E2 -	Tokovinin, A.	2014AJ....147...86T
Tok2014d		AJ 147, 86, 2014
Tok2018h	St j	Tokovinin, A.	2018AJ....156..194T
Tok2018h	+Hg	AJ 156, 194, 2018
Tok2018h	+orb

idgroup	discov	author
1	CPO	Cape Observatory
6	RST	Rossiter, R.A.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
12283-6146	RST4499	BC	1996	12	169	0.2	8.80	8.80		O	122816.79-614555.2
12283-6146	RST4499	BC	2009	13	215	0.2	8.80	8.80		O	122816.79-614555.2
12283-6146	RST4499	BC	2013	16	171	0.2	8.80	8.80	G3V	O	122816.79-614555.2
12283-6146	RST4499	BC	2015	17	143	0.2	8.80	8.80	G3V	O	122816.79-614555.2
12283-6146	RST4499	BC	2017	19	104	0.2	8.80	8.80	G3V	NO	122816.80-614558.5
12283-6146	RST4499	BC	2018	20	93	0.2	8.80	8.80	G3V	NO	122816.80-614558.5
12283-6146	RST4499	BC	2019	22	61	0.2	8.80	8.80	G3V	NO	122816.80-614558.5
12283-6146	RST4499	BC	2020	23	48	0.2	8.80	8.80	G3V	NO	122816.80-614558.5
12283-6146	RST4499	BC	2021	24	32	0.2	8.80	8.80	G3V	NO	122816.80-614558.5

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

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