09179+2834 STF3121AB (IP Cnc)

Coord 2000	09179+2834		Discov num	STF3121		Comp	AB		Coord arcsec 2000	09 17 53.45 +28 33 37.7
Date first	1832		Date last	2017		Obs	404
Pa first	20		Pa last	205		P.A. Now (θ)	25.8°
Sep first	0.9		Sep last	0.5		Sep. Now (ρ)	0.51"
Mag pri	7.90		Mag sec	8.00		delta mag (ΔM)	0.1		Spectral class	K0 (yellow-orange)
Pri motion ra	+053		Sec motion ra
Pri motion dec	-511		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	IP Cnc	80745	09179+2834	STF3121	AB	1832	2017	404	26	0.5	7.90	8.00	0.10	Y	<===
Show		80745	09179+2834	ABT 6	AB,C	1921	2001	3	44	173.2	7.32	12.87	5.55
Show		80745	09179+2834	ABT 6	AB,D	1921	2001	4	133	165.9	7.32	11.96	4.64

Quadruple system
5 visible stars in this system

Precise pa	205.1		Precise sep	0.487		Var name	IP Cnc		Cdsa2 id	STF 3121 AB
Constellation	Cancer		SAO	80745		HIP	45617		Tycho2	1957-00446-1
HD	79969		ADS	7284		GL	Gl 340A		BD	BD+29 1883
Ra deg	9.298180555555556		De deg	28.560472222222224		Distance	17.27		Distance ly	56.33
last precise pa	205.1		last precise sep	0.487

Period (P)	34.17y		Periastron (T)	1981y		Semi-major axis (a)	0.68a
Eccentricity (e)	0.32		Inclination (i)	76°		Longitude of periastron (ω)	311°
Node (Ω)	24°		Note			Grade	1	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.714 193.3 2001 0.754 195.4 2002 0.783 197.3 2003 0.800 199.0 2004 0.804 200.8 2005 0.793 202.5 2006 0.766 204.4 2007 0.722 206.4 2008 0.660 208.7 2009 0.578 211.6 2010 0.476 215.6 2011 0.356 222.2 2012 0.226 236.1 2013 0.124 279.5 2014 0.171 344.1 2015 0.294 6.4 2016 0.404 15.7 2017 0.479 21.3 2018 0.514 25.8 2019 0.514 30.0 2020 0.484 34.4 2021 0.433 39.7 2022 0.370 46.7 2023 0.302 56.7 2024 0.239 72.3 2025 0.199 96.3 2026 0.201 125.3 2027 0.244 148.7 2028 0.309 163.7 2029 0.383 173.1 2030 0.457 179.5 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
09179+2834	STF3121	AB	2005	391	205	0.8	7.90	8.00	K0	NOD	091753.42+283342.3
09179+2834	STF3121	AB	2007	392	209	0.7	7.90	8.00	K0	NOD	091753.42+283342.3
09179+2834	STF3121	AB	2009	398	214	0.5	7.90	8.00	K0	NOD	091753.45+283337.7
09179+2834	STF3121	AB	2010	404	219	0.5	7.90	8.00	K0	NOD	091753.45+283337.7
09179+2834	STF3121	AB	2017	404	205	0.5	7.90	8.00	K0	NO	091753.45+283337.7

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