IC 2581

(MWSC 1805)

0.95 UTI

0.77

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 149

Radius (P>50% members) 3.1 [arcmin]

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

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

Overview

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IC 2581 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Very young

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for IC 2581 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	–	156.863	-57.624	0.371	-7.279	3.596	-31.516
Li et al.	2025	156.867	-57.626	0.352	-7.275	3.594	–
Almeida et al.	2025	156.863	-57.625	–	–	–	–
Hunt & Reffert	2024	156.874	-57.63	0.372	-7.288	3.601	–
Celli et al.	2024	156.867	-57.626	–	–	–	–
Cavallo et al.	2024	156.852	-57.624	0.372	–	–	–
Hunt & Reffert	2023	156.874	-57.63	0.372	-7.288	3.601	–
Almeida et al.	2023	156.849	-57.624	–	–	–	–
Just et al.	2023	156.895	-57.636	–	–	–	–
Jaehnig et al.	2021	156.868	-57.627	0.382	-7.278	3.595	–
Rain et al.	2021	156.867	-57.626	0.352	-7.275	3.594	–
Dias et al.	2021	156.863	-57.625	0.349	-7.276	3.598	–
Cantat-Gaudin et al.	2020	156.867	-57.626	0.352	-7.275	3.594	–
Sánchez et al.	2020	156.871	-57.617	–	-7.315	3.736	–
Cantat-Gaudin & Anders	2020	156.867	-57.626	0.352	-7.275	3.594	–
Dias et al.	2019	156.871	-57.617	0.349	-7.254	3.614	-4.617
Soubiran et al.	2018	156.867	-57.626	–	–	–	117.68
Cantat-Gaudin et al.	2018	156.867	-57.626	0.352	-7.275	3.594	–
Loktin & Popova	2017	156.87	-57.616	–	-5.61	1.75	-4.6
Kharchenko et al.	2016	156.895	-57.636	–	–	–	–
Dias et al.	2014	156.871	-57.617	–	-5.61	1.75	–
Kharchenko et al.	2013	156.9	-57.64	–	-5.83	4.0	-4.6
Gozha et al.	2012	156.871	-57.617	–	–	–	–
Piskunov et al.	2008	156.859	-57.63	–	–	–	–
Kharchenko et al.	2007	156.87	-57.62	–	0.18	–	-4.64
van den Bergh	2006	156.875	-57.633	–	–	–	–
Kharchenko et al.	2005	156.87	-57.63	–	-6.77	3.7	-4.64
Kharchenko et al.	2003	156.81	-57.63	–	-7.86	3.15	–
Chen et al.	2003	156.862	-57.637	–	-6.32	3.67	-6.0
Dias et al.	2002	156.871	-57.617	–	-5.61	1.75	-0.52
Dambis	1999	156.871	-57.617	–	–	–	–

💡 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
Li et al.	2025	2.08	1.30	–	15	-0.252	–	–	–
Almeida et al.	2025	2.45	1.40	–	13	–	546	–	–
Hunt & Reffert	2024	–	–	–	–	–	1089*	–	–
Celli et al.	2024	–	–	–	10	–	541	–	–
Cavallo et al.	2024	2.24	1.40	–	39	-0.110	–	–	–
Hunt & Reffert	2023	2.55	1.38	1.29	21	–	–	–	–
Almeida et al.	2023	2.42	1.44	–	14	0.041	834*	0.52	–
Just et al.	2023	–	–	–	21	–	396	–	–
Jaehnig et al.	2021	2.63*	–	–	–	–	–	–	–
Rain et al.	2021	2.62	1.27	–	14	–	–	–	0
Dias et al.	2021	2.45	1.40	–	13	0.010	–	–	–
Cantat-Gaudin et al.	2020	2.54	1.17	–	10	–	–	–	–
Cantat-Gaudin & Anders	2020	2.62	–	–	–	–	–	–	–
Dias et al.	2019	2.27	1.08	–	14	-0.775	–	–	–
Soubiran et al.	2018	2.62	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.62	–	–	–	–	–	–	–
Loktin & Popova	2017	2.45	1.29	–	14	–	–	–	–
Kharchenko et al.	2016	2.22	1.62	–	21	–	–	–	–
Kharchenko et al.	2013	2.22	1.62	–	21	-0.340	–	–	–
Gozha et al.	2012	2.45	–	–	14	-0.340	2138	–	–
Piskunov et al.	2008	2.45	1.40	–	17	–	–	–	–
van den Bergh	2006	2.45	1.30	–	14	–	–	–	–
Kharchenko et al.	2005	2.45	1.40	–	17	–	–	–	–
Kharchenko et al.	2003	2.44	1.30	–	–	–	–	–	–
Chen et al.	2003	2.45	1.29	–	10	-0.340*	–	–	–
Dias et al.	2002	2.45	1.29	–	14	-0.340	–	–	–
Dambis	1999	2.17	1.32	–	13	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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