IC 1311

(Trumpler 36; Collinder 414; Dolidze 2; FSR 0214; MWSC 3270; MWSC 3271; OCL 173; OCL 174)

0.99 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

0.98

C_lit

1.0

C_dup

N₅₀ (P>50% members) 979

Stellar density (N₅₀/rad) 42.3 [N/pc²]

C3 classification AA

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.98 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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IC 1311 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate extinction. It is catalogued as a very massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Very distant Moderate extinction Very massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Rain et al. (2021)
This object probably suffers from differential reddening. We suggest exploring this effect in future works.

Ahumada & Lapasset (2007)
Several possible blue and red stragglers are pointed out in (1992AJ....103..204A).

Data

🔍 Search references for IC 1311 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–	302.7	41.177	0.133	-3.324	-5.075	-61.41
Li et al.	2025	302.697	41.177	0.124	-3.364	-5.047	–
Hu & Soubiran	2025	302.696	41.177	–	–	–	–
Carrasco-Varela et al.	2025	302.846	41.196	–	–	–	–
Almeida et al.	2025	302.693	41.174	–	–	–	–
Hunt & Reffert	2024	302.698	41.182	0.128	-3.325	-5.084	-61.446
Cavallo et al.	2024	302.696	41.177	0.125	–	–	–
Hunt & Reffert	2023	302.698	41.182	0.128	-3.325	-5.084	-61.446
Just et al.	2023	302.694	41.175	–	–	–	–
Jadhav & Subramaniam	2021	302.697	41.177	–	–	–	–
Jaehnig et al.	2021	302.697	41.18	0.134	-3.356	-5.056	–
Rain et al.	2021	302.697	41.177	0.124	-3.364	-5.047	–
Dias et al.	2021	302.693	41.174	0.131	-3.366	-5.048	-61.041
Cantat-Gaudin et al.	2020	302.697	41.177	0.124	-3.364	-5.047	–
Cantat-Gaudin & Anders	2020	302.697	41.177	0.124	-3.364	-5.047	–
Soubiran et al.	2018	302.697	41.177	–	–	–	-8.41
Bica et al.	2019	302.686	41.165	–	–	–	–
Cantat-Gaudin et al.	2018	302.697	41.177	0.124	-3.364	-5.047	–
Kharchenko et al.	2016	302.694	41.175	–	–	–	–
Dias et al.	2014	302.475	41.367	–	-0.16	-6.16	–
Kharchenko et al.	2013	302.698	41.178	–	-3.61	-2.92	-63.2
Gozha et al.	2012	302.575	41.217	–	–	–	–
Bukowiecki et al.	2011	302.696	41.189	–	–	–	–
Froebrich et al.	2007	302.7	41.179	–	–	–	–
Ahumada & Lapasset	2007	302.575	41.217	–	–	–	–
van den Bergh	2006	302.575	41.217	–	–	–	–
Dias et al.	2002	302.575	41.217	–	0.59	-6.51	-63.15
Lynga	1987	302.483	41.37	–	–	–	–

💡 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–	6.34	1.5	0.96	1406	-0.270	9118	–	4
Li et al.	2025	6.54	1.79	–	1070	-0.046	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.240⁽⁵⁾	–	–	–
Carrasco-Varela et al.	2025	5.89	1.55	–	1406	0.050	–	–	1⁽¹⁾
Almeida et al.	2025	6.69	1.55	–	1406	–	5517	–	–
Hunt & Reffert	2024	–	–	–	–	–	14882⁽¹⁾	–	–
Cavallo et al.	2024	5.30	2.05	–	1549	-0.610	–	–	–
Hunt & Reffert	2023	7.88	1.81	0.96	962	–	–	–	–
Just et al.	2023	–	–	–	1413	–	8995	–	–
Jadhav & Subramaniam	2021	6.17	1.34	–	912	–	9240	–	3⁽¹⁾
Jaehnig et al.	2021	7.54⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	6.51	0.88	–	1585	–	–	–	5
Dias et al.	2021	6.69	1.55	–	1406	0.143	–	–	–
Cantat-Gaudin et al.	2020	6.17	1.34	–	912	–	–	–	–
Kounkel et al.	2020	4.81	1.45	–	1230	–	–	–	–
Cantat-Gaudin & Anders	2020	6.51	–	–	–	–	–	–	–
Soubiran et al.	2018	6.51	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	6.51	–	–	–	–	–	–	–
Kharchenko et al.	2016	5.89	1.44	–	1413	–	–	–	–
Kharchenko et al.	2013	5.89	1.44	–	1413	-0.300	–	–	–
Gozha et al.	2012	6.03	–	–	1585	-0.300	–	–	–
Bukowiecki et al.	2011	7.01⁽¹⁾	0.88	–	1413	–	–	–	–
Ahumada & Lapasset	2007	–	2.40	–	427	–	–	–	12
van den Bergh	2006	5.33	2.40	–	417	–	–	–	–
Dias et al.	2002	6.03	0.88	–	1585	-0.300	–	–	–

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

Visualization

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