HSC 2703

0.33 UTI

0.7

C_N

0.12

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 91

Core radius and density 3.1 [pc], 0.6 [pc^-2]

C3 classification AB

C_N 0.7 Moderately populated
C_dens 0.12 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2703 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by very high extinction. It is catalogued as a massive, metal-rich, old cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~7.58 kpc) differs significantly from the median photometric distance (~5.28 kpc).

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Very distant Very high extinction Massive Metal-rich Old

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Data

🔍 Search references for HSC 2703 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–	231.917	-57.781	0.132	-4.467	-3.067	-60.672
Hunt & Reffert	2024	231.94	-57.784	0.154	-4.501	-3.097	-9.031
Cavallo et al.	2024	231.903	-57.788	0.155	–	–	–
Hunt & Reffert	2023	231.94	-57.784	0.154	-4.501	-3.097	-9.031

💡 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–	5.28	5.34	2.09	1690	0.620	1527	–	–
Hunt & Reffert	2024	5.28	5.34	2.09	1690	–	1527⁽¹⁾	–	–
Cavallo et al.	2024	4.63	5.44	–	22	0.620	–	–	–
Hunt & Reffert	2023	5.28	5.34	2.09	1690	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3966	100.0	231.93	-57.77	0.13	-4.46	-3.06	-60.67	0.13

💡 Note: The % column shows the percentage of members that HSC 2703 shares with each listed object.

Visualization

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