Hogg 1

(MWSC 1700)

0.22 UTI

0.44

C_N

0.04

C_dens

0.25

C_C3

0.19

C_lit

1.0

C_dup

N_m (P>50%) 44

Core radius and density 4.4 [pc], 0.2 [pc^-2]

C3 classification CC

C_N 0.44 Poorly populated
C_dens 0.04 Very loose
C_C3 0.25 Low quality
C_lit 0.19 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Hogg 1 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate^* 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.

(*): The parallax distance estimate (~2.78 kpc) differs significantly from the median photometric distance (~1.59 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

Data

🔍 Search references for Hogg 1 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–	145.091	-50.569	0.36	-7.063	5.236	28.186
Just et al.	2023	145.132	-50.577	–	–	–	–
Dias et al.	2018	–	–	–	-5.3	3.27	–
Dib et al.	2018	145.137	-50.58	–	–	–	–
Sampedro et al.	2017	145.137	-50.583	–	-5.95	3.51	–
Joshi et al.	2016	145.137	-50.58	–	–	–	–
Kharchenko et al.	2016	145.132	-50.577	–	–	–	–
Dias et al.	2014	145.138	-50.583	–	-6.13	3.57	–
Kharchenko et al.	2013	145.137	-50.58	–	-6.97	7.65	–

💡 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–	1.59	1.84	–	432	–	74	–	–
Just et al.	2023	–	–	–	432	–	74	–	–
Dib et al.	2018	1.59	–	–	432	–	–	–	–
Joshi et al.	2016	1.59	1.84	–	432	–	–	–	–
Kharchenko et al.	2016	1.59	1.84	–	432	–	–	–	–
Kharchenko et al.	2013	1.59	1.84	–	432	–	–	–	–

Visualization

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