04357+1010 CHR 18 Aa,Ab

Coord 2000	04357+1010		Discov num	CHR  18		Comp	Aa,Ab		Coord arcsec 2000	04 35 39.23 +10 09 39.3
Date first	1985		Date last	2021		Obs	98
Pa first	196		Pa last	193.4		P.A. Now (θ)	193.4°
Sep first	0.1		Sep last	0.114		Sep. Now (ρ)	0.114"
Mag pri	4.44		Mag sec	6.61		delta mag (ΔM)	2.17		Spectral class	A5m (white)
Pri motion ra	+051		Sec motion ra
Pri motion dec	-047		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		94026	04 35 39 +10 09 39	CHR 18 Aa,Ab	2021	98	193	0.1	4.44	6.61	2.17	Y	<===
Show	88 Tau	94026	04 35 39 +10 09 39	SHJ 45 AB	2017	32	300	69.2	4.27	7.84	3.57

Triple system
2 estimated visually detectable stars in this system

Var name	NSV1658 Tau		Constellation	Taurus		SAO	94026		HIP	21402
Tycho2	0673-01488-1		Gaia DR2	3293714285051109504		HD	29140		HR	1458
GC	5599		ADS	3317		BD	BD+09 607		Flamsteed	88 Tauri
Flamsteed name	88 Tau		Distance	47.89		Distance ly	156.22

Period (P)	6585d (18.03y)	± 12	Periastron (T)	55261m (2010.177y)	± 22	Semi-major axis (a)	240.1m	± 5.3
Eccentricity (e)	0.0715	± 0.0026	Inclination (i)	69.923°	± 0.048	Longitude of periastron (ω)	205.7°	± 1.2
Node (Ω)	146.734°	± 0.067	Notes	n		Reference	Lne2007
Equinox	2000		Last observation	2007		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 148.6 0.255 2001 155.0 0.239 2002 162.9 0.204 2003 175.4 0.154 2004 200.4 0.103 2005 249.8 0.086 2006 289.2 0.123 2007 307.6 0.174 2008 318.1 0.211 2009 326.3 0.225 2010 334.5 0.209 2011 345.5 0.168 2012 6.2 0.113 2013 54.5 0.080 2014 103.6 0.112 2015 124.5 0.169 2016 135.1 0.218 2017 142.3 0.248 2018 148.4 0.255 2019 154.8 0.240 2020 162.7 0.205 2021 174.9 0.156 2022 199.4 0.105 2023 248.2 0.086 2024 288.5 0.122 2025 307.2 0.172 2026 317.9 0.210 2027 326.0 0.225 2028 334.2 0.210 2029 345.1 0.170 2030 5.3 0.115		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Identifier	04357+1010 CHR 18 Aa
coord_arcsec_2000	043539.23+100939.3

Period (P)	3.571096d	± 0.000003	Periastron (T)	53389.3824m (2005.052y)	± 0.003	Semi-major axis (a)	1.359m	± 0.034
Eccentricity (e)	0		Inclination (i)	110.6°	± 2.7	Longitude of periastron (ω)	0°
Node (Ω)	287.5°	± 1.8	Notes	n		Reference	Lne2007
Equinox	2000		Last observation	2007		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 158.0 0.001 2001-01-01 97.8 0.001 2002-01-01 313.5 0.001 2003-01-01 267.7 0.001 2004-01-01 121.1 0.001 2005-01-01 70.0 0.001 2006-01-01 292.8 0.001 2007-01-01 211.3 2008-01-01 105.8 0.001 2009-01-01 340.7 0.001 2010-01-01 278.4 0.001 2011-01-01 134.7 0.001 2012-01-01 88.6 0.001 2013-01-01 301.8 0.001 2014-01-01 251.8 0.001 2015-01-01 113.3 0.001 2016-01-01 35.1 2017-01-01 286.3 0.001 2018-01-01 163.6 0.001 2019-01-01 98.9 0.001 2020-01-01 315.9 0.001 2021-01-01 269.4 0.001 2022-01-01 122.5 0.001 2023-01-01 73.4 0.001 2024-01-01 293.9 0.001 2025-01-01 218.7 0.001 2026-01-01 106.8 0.001 2027-01-01 346.6 0.001 2028-01-01 279.5 0.001 2029-01-01 137.3 0.001 2030-01-01 90.3 0.001		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Identifier	04357+1010 CHR 18 Ab
coord_arcsec_2000	043539.23+100939.3

Period (P)	7.886969d	± 0.000066	Periastron (T)	52507.31m (2002.637y)	± 0.02	Semi-major axis (a)	1.967m	± 0.054
Eccentricity (e)	0		Inclination (i)	27.23°	± 0.72	Longitude of periastron (ω)	0°
Node (Ω)	34°	± 8.2	Notes	n		Reference	Lne2007
Equinox	2000		Last observation	2007		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 354.7 0.002 2001-01-01 100.5 0.002 2002-01-01 214.3 0.002 2003-01-01 328.1 0.002 2004-01-01 73.8 0.002 2005-01-01 191.1 0.002 2006-01-01 299.6 0.002 2007-01-01 49.7 0.002 2008-01-01 166.3 0.002 2009-01-01 271.4 0.002 2010-01-01 26.8 0.002 2011-01-01 138.9 0.002 2012-01-01 245.7 0.002 2013-01-01 3.2 0.002 2014-01-01 110.2 0.002 2015-01-01 222.1 0.002 2016-01-01 337.6 0.002 2017-01-01 82.7 0.002 2018-01-01 199.2 0.002 2019-01-01 309.5 0.002 2020-01-01 57.8 0.002 2021-01-01 175.1 0.002 2022-01-01 280.9 0.002 2023-01-01 34.6 0.002 2024-01-01 148.6 0.002 2025-01-01 254.2 0.002 2026-01-01 11.5 0.002 2027-01-01 120.0 0.002 2028-01-01 230.1 0.002 2029-01-01 346.7 0.002 2030-01-01 91.9 0.002		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
CHR 18	Aa,Ab: 88 Tau. A is an Alpha CVn-type variable, and spectroscopic
	binary, now resolved by speckle interferometry.
	B is BD+09@606.
	1997.071: Absolute quadrant determined by triple-correlation
	techniques	Pru2002b
88 Tau	Lane et al. (2007) combine PHASES astrometry with speckle and radial	Lne2007
	velocity data to derive an orbit for the Aa,Ab components of the
	nearby sextuple 88 Tau, as well as the Aa1,Aa2 and Ab1,Ab2 subsystems.
	The parallax of the system is determined at 0".01973 +/- 0".00034,
	with semimajor axes for Aa,Ab; Aa1,Aa2; and Ab1,Ab2 of 12.17 +/- 0.17,
	0.0689 +/- 0.0012, and 0.0997 +/- 0.0021 au, respectively. Other
	derived quantities for the four components are as follows:
	Star Mass (Msun) M_K (mag) Spec Type
	Aa1 2.06 +/- 0.11 0.69 +/- 0.26 A6m
	Aa2 1.361 +/- 0.073 2.20 +/- 0.28 F5V
	Ab1 1.069 +/- 0.069 2.31 +/- 0.27 G2-3:V
	Ab2 1.057 +/- 0.068 2.00 +/- 0.27 G2-3:V
SHJ 45	STTA 52.
	AB: H 6 31.	MEv2010

refcode	metd	author	reference
Lne2007	Kp j	Lane, B.F., Muterspaugh, M.W., Fekel, F.C., Williamson, M., Browne, S.,	2007ApJ...669.1209L
Lne2007	+orb	Konacki, M.,Burke, B.F., Colavita, M.M., et al.
Lne2007		ApJ 669, 1209, 2007
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Pru2002b	S j	Prieur, J.-L., Koechlin, L., Ginestet, N., Carquillat, J.-M., Aristidi, E.,	2002ApJS..142...95P
Pru2002b		Scardia, M., Arnold, L., Avila, R., et al.
Pru2002b		ApJS 142, 95, 2002

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)
3	SHJ	South, J. & Herschel, J.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
04357+1010	CHR 18	Aa,Ab	2007	51	309	0.2	4.44	6.61	A5m	NOD	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2010	85	344	0.2	4.44	6.61	A5m	NOD	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2014	87	120	0.2	4.44	6.61	A5m	NO	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2015	90	133	0.2	4.44	6.61	A5m	NO	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2016	95	142	0.2	4.44	6.61	A5m	NO	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2018	96	155	0.2	4.44	6.61	A5m	NO	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2019	97	161	0.2	4.44	6.61	A5m	NO	043539.23+100939.3
04357+1010	CHR 18	Aa,Ab	2021	98	193	0.1	4.44	6.61	A5m	NO	043539.23+100939.3

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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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