BDSB 77

(MWSC 678)

0.13 UTI

0.0

C_N

0.39

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 22

Radius (P>50% members) 4.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.39 Loose
C_C3 0.25 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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BDSB 77 is a sparse, loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~2.35 kpc) differs significantly from the median photometric distance (~4.86 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.

Distant Moderate extinction Very young

Data

🔍 Search references for BDSB 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	–	87.558	23.888	0.426	-0.186	-2.158	-43.171
Just et al.	2023	87.547	23.879	–	–	–	–
Kharchenko et al.	2016	87.547	23.879	–	–	–	–
Kharchenko et al.	2013	87.555	23.878	–	-1.2	-4.69	–

💡 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
Just et al.	2023	–	–	–	2	–	74	–	–
Kharchenko et al.	2016	4.86	2.58	–	2	–	–	–	–
Kharchenko et al.	2013	4.86	2.58	–	2	–	–	–	–

Visualization

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