CMa02

(CMa 2)

0.01 UTI

0.58

C_N

1.0

C_dens

0.75

C_C3

0.3

C_lit

0.02

C_dup

N₅₀ (P>50% members) 66

Stellar density (N₅₀/rad) 5.3 [N/pc²]

C3 classification AB

C_N 0.58 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.3 Poorly studied
C_dup 0.02 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CMa02 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 metallicity parameter (see Parameters). It is poorly studied in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 39 along with UBC_444.

Palma et al. (2025)
Part of multiple system G11, along with Theia_2649, ASCC_30 and UBC_444.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for CMa02 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–	105.681	-7.749	0.876	-1.59	-3.484	5.879
Hunt & Reffert	2024	105.682	-7.757	0.873	-1.576	-3.467	5.707
Cavallo et al.	2024	105.67	-7.71	0.873	–	–	–
Hunt & Reffert	2023	105.682	-7.757	0.873	-1.576	-3.467	5.707
Santos-Silva et al.	2021	105.68	-7.74	0.87	-1.59	-3.45	–

💡 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–	1.25	0.425	0.42	208	0.470	171	–	–
Liu et al.	2025	1.60	0.28	–	178	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	171⁽¹⁾	–	–
Cavallo et al.	2024	1.43	0.34	–	380	1.090	–	–	–
Hunt & Reffert	2023	1.06	0.51	0.42	239	–	–	–	–
Santos-Silva et al.	2021	1.07⁽¹⁾	0.99⁽¹⁾	–	137⁽¹⁾	-0.150⁽¹⁾	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HXHWL 32	98.5	105.68	-7.74	0.88	-1.59	-3.48	6.47	0.47
CWWDL 14378	77.3	105.68	-7.72	0.88	-1.58	-3.48	5.88	0.0

💡 Note: The % column shows the percentage of members that CMa02 shares with each listed object.

Visualization

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