NGC 7801

(MWSC 2)

0.26 UTI

0.0

C_N

0.27

C_dens

0.12

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.3 [N/pc²]

C3 classification CD

C_N 0.0 Sparse
C_dens 0.27 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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NGC 7801 is a sparse, loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~2.60 kpc) differs significantly from the median photometric distance (~1.95 kpc).

Relatively close Low extinction Old

Cantat-Gaudin et al. (2020)
Long regarded as doubtful or non-existent. Included in some catalogues as a remnant, but evidence is weak. More details in Appendix A of the article.

Data

🔍 Search references for NGC 7801 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–	0.174	50.706	0.384	-3.685	-2.721	-20.061
Just et al.	2023	0.074	50.723	–	–	–	–
Bica et al.	2019	0.072	50.744	–	–	–	–
Loktin & Popova	2017	0.075	50.723	–	-0.377	-1.113	–
Kharchenko et al.	2016	0.074	50.723	–	–	–	–
Dias et al.	2014	0.087	50.742	–	-3.5	-2.53	–
Kharchenko et al.	2013	0.082	50.727	–	-3.2	-3.47	–
Kharchenko et al.	2012	0.082	50.727	–	-3.2	-3.47	–
Dias et al.	2002	0.087	50.742	–	-3.56	-2.6	–

💡 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–	1.95	0.45	–	1799	–	264	–	–
Just et al.	2023	–	–	–	1799	–	264	–	–
Loktin & Popova	2017	2.40	0.35	–	1660	–	–	–	–
Kharchenko et al.	2016	1.95	0.45	–	1799	–	–	–	–
Kharchenko et al.	2013	1.95	0.45	–	1799	–	–	–	–
Kharchenko et al.	2012	1.95	0.45	–	1799	–	–	–	–
Dias et al.	2002	1.27	0.53	–	1698	–	–	–	–

Visualization

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