Koposov 77

(MWSC 657)

0.21 UTI

0.0

C_N

0.02

C_dens

0.12

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 14

Stellar density (N₅₀/rad) 0.1 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.12 Very low quality
C_lit 0.45 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Koposov 77 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~6.84 kpc) differs significantly from the median photometric distance (~1.75 kpc).

Relatively close Moderate extinction Old

Data

🔍 Search references for Koposov 77 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	99999–	85.992	21.671	0.146	0.552	-1.55	16.211
Just et al.	2023	85.959	21.706	–	–	–	–
Bica et al.	2019	85.96	21.712	–	–	–	–
Kharchenko et al.	2016	85.959	21.706	–	–	–	–
Dias et al.	2014	85.967	21.71	–	1.58	-4.76	–
Kharchenko et al.	2013	85.968	21.705	–	0.19	-2.92	–
Glushkova et al.	2010	85.968	21.71	–	–	–	–
Koposov et al.	2008	85.969	21.71	–	–	–	–
Dias et al.	2002	85.967	21.71	–	1.56	-4.9	–

💡 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]	B_frac	BSS
UCC	99999–	1.75	1.77	–	2786	–	87	–	–
Just et al.	2023	–	–	–	2786	–	87	–	–
Kharchenko et al.	2016	1.75	1.77	–	2786	–	–	–	–
Kharchenko et al.	2013	1.75	1.77	–	2786	–	–	–	–
Glushkova et al.	2010	1.75	1.77	–	4467	–	–	–	–
Koposov et al.	2008	1.75	1.77	–	4467	–	–	–	–
Dias et al.	2002	5.40	1.74	–	1202	–	–	–	–

Visualization

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