Collinder 399

0.08 UTI

0.0

C_N

0.01

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 12

Radius (P>50% members) 7.5 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

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

Overview

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Collinder 399 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 20 years.

(*): The parallax distance estimate (~6.48 kpc) differs significantly from the median photometric distance (~1.29 kpc).

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Intermediate age

Dias et al. (2002)
Asterism (Baumgardt, H. 1998, A&A 340, 402; Orellana, R. B.; De Biasi, M. S. 2008, RevMexAA 34, 111)

Data

🔍 Search references for Collinder 399 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	–	291.321	20.163	0.154	-1.918	-3.867	-77.284
van den Bergh	2006	291.35	20.183	–	–	–	–

💡 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
van den Bergh	2006	1.29	1.18	–	158	–	–	–	–

Visualization

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