IC 1311

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

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0.99 UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.97
Clit
1.0
Cdup
Nm (P>50%) 979
Core radius and density 2.5 [pc], 11 [pc-2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.97 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
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.

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).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.021, e_all=0.0848.

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

Bica et al. (2019)
Analysis of Dolidze objects by M. Kronberger reported in DAML02.

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
ℹī¸
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 –
Dias et al. 2018 – – – -3.12 -4.24 –
Sampedro et al. 2017 302.692 41.174 – -0.48 -8.03 –
Kharchenko et al. 2016 302.694 41.175 – – – –
Netopil et al. 2016 302.699 41.178 – – – –
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] Bfrac BSS
UCC 99999– 6.51 1.55 0.965 1406 -0.240 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 7.88 1.81 0.97 961 – 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 – – – –
Netopil et al. 2016 8.54 – – 1380 – – – –
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 – – – –
Paunzen et al. 2010 – – – – -0.230 – – –
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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IC 1311 UCC
IC 1311 HUNT23
IC 1311 CANTAT20
Galactocentric position diagram