Roslund 4

0.72 UTI

0.76

C_N

0.81

C_dens

0.75

C_C3

0.65

C_lit

1.0

C_dup

N_m (P>50%) 129

Core radius and density 2.1 [pc], 4.0 [pc^-2]

C3 classification AB

C_N 0.76 Rich
C_dens 0.81 Dense
C_C3 0.75 High quality
C_lit 0.65 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Roslund 4 is a rich, dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is moderately studied in the literature.

Note: This object shares a very small percentage of members with 2 later reported entries. See table with shared members information.

Relatively close High extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.3949, e_all=0.0567.

Data

🔍 Search references for Roslund 4 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–	301.189	29.202	0.423	-2.174	-5.11	-4.256
Hunt & Reffert	2024	301.214	29.191	0.433	-2.231	-5.17	55.191
Celli et al.	2024	301.199	29.196	–	–	–	–
Cavallo et al.	2024	301.105	29.1	0.434	–	–	–
Hunt & Reffert	2023	301.214	29.191	0.433	-2.231	-5.17	55.191
Jaehnig et al.	2021	301.212	29.188	0.46	-2.168	-5.089	–
Rain et al.	2021	301.199	29.196	0.423	-2.166	-5.057	–
Cantat-Gaudin et al.	2020	301.199	29.196	0.423	-2.166	-5.057	–
Zhong et al.	2020	301.199	29.196	–	-2.166	-5.057	-4.545
Cantat-Gaudin & Anders	2020	301.199	29.196	0.423	-2.166	-5.057	–
Cantat-Gaudin et al.	2018	301.199	29.196	0.423	-2.166	-5.057	–
Dias et al.	2018	–	–	–	-1.96	-4.46	–
Loktin & Popova	2017	301.23	29.217	–	-5.016	-5.668	-15.7
Sampedro et al.	2017	301.225	29.217	–	-2.04	-4.0	–
Dias et al.	2014	301.225	29.217	–	-2.9	-4.91	–
Gozha et al.	2012	301.225	29.217	–	–	–	–
Kharchenko et al.	2007	301.23	29.22	–	0.04	–	–
Ahumada & Lapasset	2007	301.225	29.217	–	–	–	–
van den Bergh	2006	301.225	29.217	–	–	–	–
Dias et al.	2002	301.225	29.217	–	-2.9	-4.91	-15.7
Dambis	1999	301.225	29.217	–	–	–	–
Lynga	1987	301.2	29.202	–	–	–	–

💡 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–	2.19	3.08	2.73	13	0.135	616	–	0
Hunt & Reffert	2024	2.15	3.30	2.73	10	–	918⁽¹⁾	–	–
Celli et al.	2024	–	–	–	17	–	315	–	–
Cavallo et al.	2024	2.18	3.23	–	10	0.270	–	–	–
Hunt & Reffert	2023	2.15	3.30	2.73	10	–	–	–	–
Jaehnig et al.	2021	2.17⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.21	2.87	–	4	–	–	–	0
Cantat-Gaudin et al.	2020	2.06	2.33	–	17	–	–	–	–
Kounkel et al.	2020	2.19	3.77	–	13	–	–	–	–
Zhong et al.	2020	2.21⁽¹⁾	2.87	–	6600	0.000	–	–	–
Cantat-Gaudin & Anders	2020	2.21	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.21	–	–	–	–	–	–	–
Loktin & Popova	2017	2.51	3.04	–	34	–	–	–	–
Gozha et al.	2012	2.00	–	–	4	–	–	–	–
Ahumada & Lapasset	2007	–	3.12	–	28	–	–	–	0
van den Bergh	2006	2.51	3.12	–	28	–	–	–	–
Dias et al.	2002	2.00	2.87	–	4	–	–	–	–
Dambis	1999	2.19	2.88	–	16	–	–	–	–
Lynga	1987	–	–	–	6	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
DB2001 3	0.8	301.17	29.2	0.22	-2.71	-5.24	-2.07	0.04
IC4955	0.8	301.17	29.2	0.23	-2.68	-5.23	6.29	0.01

💡 Note: The % column shows the percentage of members that Roslund 4 shares with each listed object.

Visualization

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