Stephenson 2

(RSGC 2; BDB2003 G026.18-00.06; MWSC 2969; BDB 14)

0.28 UTI

0.0

C_N

0.12

C_dens

0.38

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 19

Stellar density (N₅₀/rad) 0.6 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.12 Very loose
C_C3 0.38 Low quality
C_lit 0.45 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Stephenson 2 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, near the mid-plane, affected by very high extinction. It is catalogued as a low-mass, very young cluster (see Parameters). It is poorly studied in the literature.

Distant Very high extinction Low mass Very young

Morales et al. (2013)
Classified as morphological type 'OC0' (emerging exposed cluster). Morphological flag: possibly associated submm emission surrounding the cluster.

Data

🔍 Search references for Stephenson 2 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–	279.87	-6.025	0.199	-2.383	-4.063	44.171
He et al.	2023	279.941	-6.095	0.307	-0.99	-1.913	217.63
Just et al.	2023	279.908	-6.031	–	–	–	–
Bica et al.	2019	279.823	-6.034	–	–	–	–
Kharchenko et al.	2016	279.908	-6.031	–	–	–	–
Dias et al.	2014	279.921	-6.028	–	-0.44	0.8	–
Kharchenko et al.	2013	279.915	-6.03	–	2.69	-7.0	–
Morales et al.	2013	279.833	-6.029	–	–	–	–
Dias et al.	2002	279.921	-6.028	–	-0.44	0.8	–

💡 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–	4.07	7.575	–	4	–	15	–	–
He et al.	2023	4.07	5.15	–	6	–	–	–	–
Just et al.	2023	–	–	–	1	–	15	–	–
Kharchenko et al.	2016	1.13	10.00	–	1	–	–	–	–
Kharchenko et al.	2013	1.13	10.00	–	1	–	–	–	–
Morales et al.	2013	7.39	–	–	16	–	–	–	–
Dias et al.	2002	5.90	3.72	–	20	–	–	–	–

Visualization

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