Feigelson 1

(epsilon Chamaeleontis; MWSC 1990)

0.70 UTI

0.63

C_N

1.0

C_dens

1.0

C_C3

0.44

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 76

Radius (P>50% members) 129.9 [arcmin]

C_N 0.63 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.44 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Feigelson 1 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a very young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a moderate percentage of members with 3 later reported entries. See table with shared members information.

Very close Low extinction Very young

Data

🔍 Search references for Feigelson 1 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	180.432	-76.369	9.737	-40.273	-6.173	13.737
He et al.	2022	180.07	-78.676	9.818	-41.347	-6.05	–
Bica et al.	2019	179.973	-78.209	–	–	–	–
Loktin & Popova	2017	179.97	-78.207	–	-39.494	-0.995	13.7
Dias et al.	2014	179.963	-78.207	–	-4.16	1.14	–
Gozha et al.	2012	179.963	-78.207	–	–	–	–
Kharchenko et al.	2007	179.97	-78.21	–	0.15	–	–
Dias et al.	2002	179.963	-78.207	–	-39.5	-1.0	13.0

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	Bfr	BSS
He et al.	2022	–	0.05	–	8	–	–	–	–
Loktin & Popova	2017	0.11	0.06	–	4	–	–	–	–
Gozha et al.	2012	0.11	–	–	4	–	–	–	–
Dias et al.	2002	0.11	0.06	–	4	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 193	40.8	180.23	-78.34	9.77	-41.23	-6.05	13.81	0.0
HSC 2515	32.9	180.23	-78.74	9.81	-41.36	-5.78	15.01	0.0
HSC 2523	9.2	187.32	-72.92	9.84	-39.68	-10.81	12.79	0.25

💡 Note: The % column shows the percentage of members that Feigelson 1 shares with each listed object.

Visualization

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