ASCC 51

(MWSC 1647)

0.80 UTI

0.75

C_N

1.0

C_dens

1.0

C_C3

0.62

C_lit

1.0

C_dup

N₅₀ (P>50% members) 107

Stellar density (N₅₀/rad) 5.4 [N/pc²]

C3 classification AA

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.62 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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ASCC 51 is a rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is moderately studied in the literature.

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

Close Low extinction Near-solar metallicity Intermediate age

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=3, with probability of formation through binary evolution >=0.5 N=0.

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 8 along with CWNU_61.

Palma et al. (2025)
Classified as genetic pair P185, along with CWNU_29.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for ASCC 51 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–	139.846	-69.812	1.814	-7.676	7.989	10.178
Yan et al.	2026	140.397	-69.855	1.818	-7.613	7.964	–
Hunt & Reffert	2024	140.397	-69.855	1.818	-7.613	7.964	8.735
Cavallo et al.	2024	139.934	-69.637	1.811	–	–	–
Hunt & Reffert	2023	140.397	-69.855	1.818	-7.613	7.964	8.735
Just et al.	2023	139.52	-69.687	–	–	–	–
Bica et al.	2019	139.49	-69.686	–	–	–	–
Kharchenko et al.	2016	139.52	-69.687	–	–	–	–
Dias et al.	2014	139.5	-69.69	–	-3.88	6.6	–
Kharchenko et al.	2013	139.522	-69.69	–	-8.15	8.39	–
Piskunov et al.	2008	139.49	-69.686	–	–	–	–
Piskunov et al.	2007	139.49	-69.686	–	–	–	–
Kharchenko et al.	2005	139.5	-69.69	–	-8.28	7.0	–
Dias et al.	2002	139.5	-69.69	–	-8.28	7.0	–

💡 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–	0.5	0.16	0.35	339	0.150	227	–	–
Yan et al.	2026	–	–	–	181	–	–	–	–
Liu et al.	2025	0.69	0.13	–	74	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	120⁽¹⁾	–	–
Cavallo et al.	2024	0.56	0.45	–	91	0.150	–	–	–
Hunt & Reffert	2023	0.53	0.07	0.35	126	–	–	–	–
Just et al.	2023	–	–	–	347	–	62	–	–
Kharchenko et al.	2016	0.50	0.33	–	347	–	–	–	–
Kharchenko et al.	2013	0.50	0.33	–	347	–	–	–	–
Piskunov et al.	2008	0.50	0.16	–	339	–	752⁽¹⁾	–	–
Piskunov et al.	2007	0.50	0.16	–	339	–	334	–	–
Kharchenko et al.	2005	0.50	0.16	–	339	–	–	–	–
Dias et al.	2002	0.50	0.16	–	339	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 260	28.0	140.04	-69.98	1.81	-7.71	8.04	10.67	0.0

💡 Note: The % column shows the percentage of members that ASCC 51 shares with each listed object.

Visualization

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