Koposov 36

(FSR 0814; MWSC 601; Teutsch J0536.8+3112; MWSC 600)

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0.89 UTI
0.76
CN
1.0
Cdens
0.75
CC3
0.97
Clit
1.0
Cdup
Nm (P>50%) 134
Core radius and density 1.5 [pc], 6.5 [pc-2]
C3 classification AB
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.97 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Koposov 36 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

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

Palma et al. (2025)
Classified as optical pair P387, along with HSC_1392.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2706, e_all=0.1062.

Bica et al. (2019)
The Preliminary Amateur Open Cluster Catalog, Version 08/03/2003.

Data
πŸ” Search references for Koposov 36 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 84.225 31.214 0.571 0.761 -3.667 52.124
Almeida et al. 2025 84.222 31.204 – – – –
Zhang et al. 2024 84.209 31.208 – – – –
Hunt & Reffert 2024 84.209 31.208 0.564 0.731 -3.65 52.006
Cavallo et al. 2024 84.248 31.192 0.559 – – –
Hunt & Reffert 2023 84.209 31.208 0.564 0.731 -3.65 52.006
Almeida et al. 2023 84.228 31.22 – – – –
Just et al. 2023 84.19 31.201 – – – –
Jadhav & Subramaniam 2021 84.218 31.21 – – – –
Dias et al. 2021 84.222 31.204 0.542 0.79 -3.658 –
Spina et al. 2021 84.218 31.216 0.552 0.811 -3.642 –
Cantat-Gaudin et al. 2020 84.218 31.21 0.541 0.804 -3.668 –
SΓ‘nchez et al. 2020 84.213 31.211 – 0.809 -3.737 –
Zhong et al. 2020 84.218 31.21 – 0.804 -3.668 -34.828
Cantat-Gaudin & Anders 2020 84.218 31.21 0.541 0.804 -3.668 –
Monteiro & Dias 2019 84.211 31.211 – 0.819 -3.686 2.655
Soubiran et al. 2018 84.218 31.21 – – – 52.26
Bica et al. 2019 84.205 31.214 – – – –
Cantat-Gaudin et al. 2018 84.218 31.21 0.541 0.804 -3.668 –
Dias et al. 2018 – – – -0.61 -6.92 –
Dib et al. 2018 84.199 31.2 – – – –
Loktin & Popova 2017 84.21 31.211 – 0.979 -2.491 –
Sampedro et al. 2017 84.213 31.211 – 0.84 -3.84 –
Joshi et al. 2016 84.199 31.2 – – – –
Kharchenko et al. 2016 84.19 31.201 – – – –
Dias et al. 2014 84.213 31.211 – 0.1 -3.99 –
Kharchenko et al. 2013 84.199 31.2 – 2.94 -8.86 –
Kharchenko et al. 2012 84.199 31.2 – 2.94 -8.86 –
Glushkova et al. 2010 84.211 31.211 – – – –
Koposov et al. 2008 84.212 31.211 – – – –
Froebrich et al. 2007 84.204 31.212 – – – –
Dias et al. 2002 84.213 31.211 – 0.1 -3.99 –

πŸ’‘ 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– 1.71 2.54 2.63 252 -0.042 526 0.63 1
Almeida et al. 2025 1.71 2.54 – 68 – 468 – –
Zhang et al. 2024 – – – – -0.123(1) – – –
Hunt & Reffert 2024 1.60 1.97 2.63 138 – 721(1) – –
Cavallo et al. 2024 2.06 2.29 – 89 0.700 – – –
Hunt & Reffert 2023 1.60 1.97 2.63 138 – – – –
Almeida et al. 2023 1.64 2.58 – 42 -0.112 537(1) 0.63 –
Just et al. 2023 – – – 279 – 69 – –
Jadhav & Subramaniam 2021 1.86 1.76 – 427 – 526 – 1(1)
Dias et al. 2021 1.71 2.54 – 68 0.031 – – –
Spina et al. 2021 1.82 – – 427 – – – –
Cantat-Gaudin et al. 2020 1.86 1.76 – 427 – – – –
Kounkel et al. 2020 1.88 2.05 – 224 – – – –
Zhong et al. 2020 1.75(1) 2.62 – 8445 -0.095 – – –
Cantat-Gaudin & Anders 2020 1.75 – – – – – – –
Monteiro & Dias 2019 1.88 2.49 – 36 0.011 – – –
Soubiran et al. 2018 1.75 – – – – – – –
Cantat-Gaudin et al. 2018 1.75 – – – – – – –
Dib et al. 2018 1.60 – – 279 – – – –
Loktin & Popova 2017 2.60 2.45 – 380 – – – –
Joshi et al. 2016 1.60 2.62 – 279 – – – –
Kharchenko et al. 2016 1.60 2.62 – 279 – – – –
Kharchenko et al. 2013 1.60 2.62 – 279 – – – –
Kharchenko et al. 2012 1.60 2.62 – 279 – – – –
Glushkova et al. 2010 1.70 2.62 – 224 – – – –
Koposov et al. 2008 1.70 2.62 – 224 – – – –
Dias et al. 2002 1.70 2.62 – 224 – – – –

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

Visualization
ℹ️
Koposov 36 UCC
Koposov 36 HUNT23
Koposov 36 CANTAT20
Galactocentric position diagram