Roslund 1

(MWSC 3169; OCL 112)

0.73 UTI

0.41

C_N

1.0

C_dens

0.75

C_C3

0.75

C_lit

1.0

C_dup

N₅₀ (P>50% members) 41

Stellar density (N₅₀/rad) 7.5 [N/pc²]

C3 classification AB

C_N 0.41 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.75 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Roslund 1 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a 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 absorption and age parameters (see Parameters). It is well-studied in the literature.

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

Close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 301 along with OC_0077.

Palma et al. (2025)
Classified as optical pair P157, along with HSC_450.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Roslund 1 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–	296.243	17.523	1.134	-0.861	-5.832	-4.783
Hunt & Reffert	2024	296.264	17.549	1.126	-0.874	-5.828	-5.623
Cavallo et al.	2024	296.247	17.491	1.129	–	–	–
Hunt & Reffert	2023	296.264	17.549	1.126	-0.874	-5.828	-5.623
Just et al.	2023	296.273	17.508	–	–	–	–
Bica et al.	2019	296.288	17.519	–	–	–	–
Kharchenko et al.	2016	296.273	17.508	–	–	–	–
Dias et al.	2014	296.25	17.517	–	-2.91	0.28	–
Kharchenko et al.	2013	296.28	17.51	–	0.4	-7.21	–
Piskunov et al.	2008	296.241	17.522	–	–	–	–
Kharchenko et al.	2005	296.25	17.52	–	1.18	-7.08	–
Kharchenko et al.	2003	296.28	17.53	–	0.01	-4.63	–
Dias et al.	2002	296.25	17.517	–	1.18	-7.08	–

💡 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–	0.79	0.16	0.81	295	0.190	64	–	–
Liu et al.	2025	1.15	0.32	–	54	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	115⁽¹⁾	–	–
Cavallo et al.	2024	0.86	1.15	–	105	0.190	–	–	–
Hunt & Reffert	2023	0.85	0.99	0.81	169	–	–	–	–
Just et al.	2023	–	–	–	582	–	13	–	–
Kharchenko et al.	2016	0.79	0.16	–	582	–	–	–	–
Kharchenko et al.	2013	0.79	0.16	–	582	–	–	–	–
Piskunov et al.	2008	0.67	0.16	–	295	–	–	–	–
Kharchenko et al.	2005	0.67	0.16	–	295	–	–	–	–
Kharchenko et al.	2003	0.83	0.46	–	–	–	–	–	–
Dias et al.	2002	0.67	0.16	–	295	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0079	63.4	296.24	17.54	1.13	-0.85	-5.85	-7.3	0.0

💡 Note: The % column shows the percentage of members that Roslund 1 shares with each listed object.

Visualization

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