10474+0236 HDS1542AB

Coord 2000	10474+0236		Discov num	HDS1542		Comp	AB		Coord arcsec 2000	10 47 24.29 +02 35 32.0
Date first	1991		Date last	2018		Obs	9
Pa first	219		Pa last	258		P.A. Now (θ)	260.3°
Sep first	0.4		Sep last	0.5		Sep. Now (ρ)	0.54"
Mag pri	12.91		Mag sec	13.20		delta mag (ΔM)	0.29		Spectral class	M1 (red)
Pri motion ra	+180		Sec motion ra
Pri motion dec	+030		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

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name

SAO

coord

wds_name

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

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10 47 24 +02 35 32

HDS 1542 AB

2018

9

260

0.5

12.91

13.20

0.29

Y

<===

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10 47 24 +02 35 32

TOK 542 AC

2015

7

226

756.0

12.28

14.84

2.56

Triple system
3 visible stars in this system

Precise pa	258.3		Precise sep	0.528		Constellation	Sextans		HIP	52774
Gaia DR2	3809351492919091968		Distance	41.96		Distance ly	136.87		last precise pa	258.3
last precise sep	0.528

Period (P)	121.7y	± 8.2	Periastron (T)	2100.6y	± 8.2	Semi-major axis (a)	0.518a	± 0.031
Eccentricity (e)	0.412	± 0.069	Inclination (i)	60.5°	± 2.7	Longitude of periastron (ω)	250.4°	± 6.8
Node (Ω)	235°	± 3.4	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2015

label rho theta 2000 0.503 235.5 2001 0.513 236.9 2002 0.523 238.2 2003 0.531 239.5 2004 0.538 240.7 2005 0.544 241.9 2006 0.550 243.1 2007 0.554 244.3 2008 0.558 245.5 2009 0.560 246.6 2010 0.562 247.7 2011 0.564 248.8 2012 0.564 250.0 2013 0.564 251.1 2014 0.563 252.2 2015 0.562 253.3 2016 0.560 254.5 2017 0.558 255.6 2018 0.555 256.7 2019 0.552 257.9 2020 0.548 259.1 2021 0.543 260.3 2022 0.539 261.5 2023 0.534 262.7 2024 0.528 264.0 2025 0.523 265.3 2026 0.517 266.6 2027 0.510 268.0 2028 0.504 269.3 2029 0.497 270.8 2030 0.490 272.2		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
10474+0236	HDS1542	AB	2014	3	252	0.6	12.91	13.20	M1		104724.20+023531.8
10474+0236	HDS1542	AB	2018	7	258	0.5	12.91	13.20	M1		104724.29+023532.0

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