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Doubles in this session

Current system

01198-0031
FIN 337BC

Nearby doubles

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HDO 49

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GWP 167

29' : 01195-0002
CBL 208

33' : 01220-0033
SKF2333

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LDS3268

39' : 01202+0108
GRV1165

40' : 01224-0039
GWP 177

41' : 01223-0019
BAL 648

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CVR1068

45' : 01227+0032
LDS3270

48' : 01228+0043
FMR 17

52' : 01232+0035
BAL 952

59' : 01235-0011
KPP2653

64' : 01240+0021
DAM 768

64' : 01239+0050
GWP 182

65' : 01240+0016
RST4746

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LDS5326

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GWP 165

79' : 01232+0131
A 2314

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BUP 18AB

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LV 1

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BU 504AB

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GWP 188

Selections

Binocular doubles

Quadruple Systems

Multiple Systems

Neglected List I

Neglected List II

Herschel, J.F.W.

01198-0031 FIN 337BC

01^h 19^m 48.33^s -00° 30' 31.0" P.A. 165.80 sep 0.1 mag 7.40,7.60 Sp F5 dist. 100.7 pc (328.48 l.y.)

Coord 2000	01198-0031		Discov num	FIN 337		Comp	BC		Coord arcsec 2000	01 19 48.33 -00 30 31.0
Date first	1958		Date last	2019		Obs	86
Pa first	227		Pa last	329		P.A. Now (θ)	165.8°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.09"
Mag pri	7.40		Mag sec	7.60		delta mag (ΔM)	0.2		Spectral class	F5 (yellow-white)
Pri motion ra	+013		Sec motion ra
Pri motion dec	-014		Sec motion dec
Notes	N O (See Notes, Orbital solution)

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

01198-0031 SYSTEM COMPONENTS

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	42 Cet	129235	01198-0031	STF 113	A,BC	1829	2019	331	22	1.6	6.45	6.99	0.54	Y
Show		129235	01198-0031	FIN 337	BC	1958	2019	86	166	0.1	7.40	7.60	0.20	Y	<===

Triple system
4 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	329.4		Precise sep	0.093		Constellation	Cetus		SAO	129235
HIP	6226		HD	8036		HR	385		GC	1600
ADS	1081		Flamsteed	42 Ceti		Flamsteed name	42 Cet		Distance	100.7
Distance ly	328.48		last precise pa	329.4		last precise sep	0.093

ORBITAL ELEMENTS

Period (P)	27.028y	± 0.09	Periastron (T)	1995.04y	± 0.13	Semi-major axis (a)	0.10855a	± 0.00071
Eccentricity (e)	0.215	± 0.011	Inclination (i)	16.8°	± 2.8	Longitude of periastron (ω)	13°	± 18
Node (Ω)	194°	± 17	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label	rho	theta
2000	0.100	298.1
2001	0.106	312.1
2002	0.112	324.6
2003	0.117	335.8
2004	0.122	346.0
2005	0.126	355.6
2006	0.129	4.6
2007	0.131	13.3
2008	0.132	21.8
2009	0.131	30.2
2010	0.130	38.8
2011	0.128	47.7
2012	0.124	56.9
2013	0.120	66.7
2014	0.115	77.3
2015	0.110	88.8
2016	0.105	101.4
2017	0.100	115.4
2018	0.095	130.8
2019	0.091	147.6
2020	0.088	165.8
2021	0.086	185.0
2022	0.085	205.1
2023	0.085	225.4
2024	0.086	245.4
2025	0.089	264.5
2026	0.094	282.0
2027	0.099	297.7
2028	0.105	311.7
2029	0.111	324.2
2030	0.117	335.5

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita

wds01198-0031b.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01198-0031	FIN 337	BC	2005	68	3	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2008	75	26	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2009	77	32	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2011	79	47	0.1	7.40	7.60	F5	NOD	011948.29-003032.4
01198-0031	FIN 337	BC	2013	80	254	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2014	83	267	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2015	84	280	0.1	7.40	7.60	F5	NO	011948.29-003032.4
01198-0031	FIN 337	BC	2018	85	322	0.1	7.40	7.60	F5	NO	011948.33-003031.0
01198-0031	FIN 337	BC	2019	86	329	0.1	7.40	7.60	F5	NO	011948.33-003031.0

If you need more information about this double, apply for a data request form to the WDS.