Harvard 9

(MWSC 2304; OCL 944; ESO 177 08)

0.18 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.38

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 12

Radius (P>50% members) 8.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.12 Very low quality
C_lit 0.38 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Harvard 9 is a sparse, very loose object of very 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 poorly studied in the literature.

(*): The parallax distance estimate (~4.14 kpc) differs significantly from the median photometric distance (~1.48 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 Harvard 9 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	–	233.464	-53.697	0.241	-7.369	-5.145	-118.062
Just et al.	2023	233.448	-53.679	–	–	–	–
Bica et al.	2019	233.443	-53.677	–	–	–	–
Kharchenko et al.	2016	233.448	-53.679	–	–	–	–
Dias et al.	2014	233.442	-53.667	–	-1.81	-2.53	–
Kharchenko et al.	2013	233.46	-53.68	–	-4.21	-2.97	–
Dias et al.	2002	233.442	-53.667	–	-1.81	-2.53	–

💡 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]	Bfr	BSS
Just et al.	2023	–	–	–	178	–	142	–	–
Kharchenko et al.	2016	1.48	2.90	–	178	–	–	–	–
Kharchenko et al.	2013	1.48	2.90	–	178	–	–	–	–
Dias et al.	2002	1.48	2.90	–	178	–	–	–	–

Visualization

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