Melotte 39

(Collinder 78; NGC 2126; FSR 0730; OCL 418; MWSC 708)

UTI: UCC Trust Index C_N C_dens C_C3 C_lit C_dup 0.8 1.0 1.0 1.0 1.0 Melotte 39 is a rich, very dense object of very high C3 quality. It is very well-studied in the literature. This object shares a large percentage of members with a later reported entry.
C3	N_50	r_50
AA	232	8.8

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Positions

Reference	RA	DEC	Plx	pmRA	pmDE	Rv
Dias et al. (2002)	90.621	49.918	–	-0.63	-1.62	–
Kharchenko et al. (2012)	90.648	49.872	–	-1.38	-1.71	–
Loktin & Popova (2017)	90.645	49.872	–	-0.152	-0.8	–
Bica et al. (2019)	90.631	49.873	–	–	–	–
Cantat-Gaudin et al. (2020)	90.658	49.883	0.747	0.848	-2.615	–
Dias et al. (2021)	90.657	49.895	0.743	0.841	-2.606	-11.741
Jaehnig et al. (2021)	90.655	49.879	0.78	0.863	-2.603	–
Tarricq et al. (2022)	90.638	49.883	0.759	0.822	-2.589	–
Hunt & Reffert (2023)	90.65	49.872	0.76	0.817	-2.601	-12.705
Cavallo et al. (2024)	90.671	49.89	0.761	–	–	–
Hunt & Reffert (2024)	90.65	49.872	0.76	0.817	-2.601	-12.705
Hu & Soubiran (2025)	90.671	49.89	–	–	–	–
UCC	90.662	49.88	0.756	0.813	-2.6	-12.886

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Estimated members

1 2 3

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Fundamental parameters

Reference	Values
Dias et al. (2002)	E(B-V)=0.27, Dist=1090.0, Age=9.1
Kharchenko et al. (2012)	e_bv=0.05, distance=1100, log_age=9.45
Loktin & Popova (2017)	E(B-V)=0.252, Dmod=11.652, logt=8.95
Cantat-Gaudin et al. (2020)	AVNN=0.68, DMNN=10.58, AgeNN=8.99
Dias et al. (2021)	Av=0.667, Dist=1234, logage=9.186, [Fe/H]=0.016
Tarricq et al. (2022)	Dist=1265, logAgeNN=8.99
Hunt & Reffert (2023)	AV50=0.348, diffAV50=0.405, MOD50=10.471, logAge50=9.25
Cavallo et al. (2024)	AV50=0.77, dMod50=10.56, logAge50=9.15, [Fe/H]50=0.08
Hunt & Reffert (2024)	MassJ=610.126
Hu & Soubiran (2025)	MA22=-0.21, MA23f=-0.3, MA23g=-0.16, MZ23=-0.18, MK24=-0.19, MF24=-0.17

Search coordinates in Bayestar19

Cluster region

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 196	97.0	90.66	49.88	0.76	0.81	-2.6	-13.21	0.03