NGC 1807

(MWSC 479)

0.24 UTI

0.0

C_N

0.06

C_dens

0.38

C_C3

0.38

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 3.9 [pc], 0.3 [pc^-2]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.06 Very loose
C_C3 0.38 Low quality
C_lit 0.38 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 1807 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~1.85 kpc) differs significantly from the median photometric distance (~2.81 kpc).

Note: This object shares a large percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Relatively close Moderate extinction Intermediate age

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

Dias et al. (2016)
Asterism (Balaguer-Núñez et al. 2004, A&A 426, 827; 819); cat V3.5 (Jan 2016)

Data

🔍 Search references for NGC 1807 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–	77.785	16.553	0.54	0.447	-0.942	65.358
Just et al.	2023	77.695	16.522	–	–	–	–
Kharchenko et al.	2016	77.695	16.522	–	–	–	–
Tadross	2014	77.679	16.522	–	–	–	–
Kharchenko et al.	2013	77.703	16.522	–	0.75	-1.35	–
Dias et al.	2002	77.679	16.522	–	–	–	–
Lynga	1987	77.67	16.525	–	–	–	–
Sulentic et al.	1973	77.661	16.53	–	–	–	–
Alter et al.	1970	77.67	16.525	–	–	–	–

💡 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–	2.81	1.755	–	178	–	649	–	–
Just et al.	2023	–	–	–	178	–	649	–	–
Kharchenko et al.	2016	2.81	2.50	–	178	–	–	–	–
Tadross	2014	0.96	1.01	–	1000	–	–	–	–
Kharchenko et al.	2013	2.81	2.50	–	178	–	–	–	–
Lynga	1987	–	0.60	–	–	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
NGC 1817	76.0	78.14	16.7	0.57	0.43	-0.93	65.74	1.0

💡 Note: The % column shows the percentage of members that NGC 1807 shares with each listed object.

Visualization

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