FSR 1085

(SAI 71; MWSC 1007; FoF 928)

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0.86 UTI
0.76
CN
1.0
Cdens
0.75
CC3
0.88
Clit
1.0
Cdup
Nm (P>50%) 125
Core radius and density 1.1 [pc], 9.7 [pc-2]
C3 classification AB
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.88 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
FSR 1085 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 low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1926, e_all=0.1807.

Data
πŸ” Search references for FSR 1085 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 103.297 -0.196 0.617 -1.035 0.266 44.219
Almeida et al. 2025 103.29 -0.186 – – – –
Zhang et al. 2024 103.296 -0.197 – – – –
Hunt & Reffert 2024 103.296 -0.197 0.613 -1.01 0.268 43.105
Cavallo et al. 2024 103.301 -0.196 0.611 – – –
Hunt & Reffert 2023 103.296 -0.197 0.613 -1.01 0.268 43.105
Almeida et al. 2023 103.294 -0.189 – – – –
Just et al. 2023 103.302 -0.188 – – – –
Dias et al. 2021 103.29 -0.186 0.601 -1.031 0.256 –
Cantat-Gaudin et al. 2020 103.29 -0.192 0.596 -1.05 0.262 –
SΓ‘nchez et al. 2020 103.296 -0.192 – -1.069 0.269 –
Zhong et al. 2020 103.29 -0.192 – -1.05 0.262 42.229
Cantat-Gaudin & Anders 2020 103.29 -0.192 0.596 -1.05 0.262 –
Liu & Pang 2019 103.297 -0.194 0.61 -1.02 0.217 –
Bossini et al. 2019 103.29 -0.192 – – – –
Soubiran et al. 2018 103.29 -0.192 – – – 41.66
Bica et al. 2019 103.294 -0.191 – – – –
Cantat-Gaudin et al. 2018 103.29 -0.192 0.596 -1.05 0.262 –
Dias et al. 2018 – – – -0.45 -0.07 –
Dib et al. 2018 103.309 -0.19 – – – –
Sampedro et al. 2017 103.296 -0.192 – 0.76 -1.93 –
Joshi et al. 2016 103.309 -0.19 – – – –
Kharchenko et al. 2016 103.302 -0.188 – – – –
Dias et al. 2014 103.296 -0.192 – -0.03 -2.51 –
Kharchenko et al. 2013 103.309 -0.19 – -0.87 0.39 –
Glushkova et al. 2010 103.297 -0.192 – – – –
Froebrich et al. 2007 103.296 -0.194 – – – –
Dias et al. 2002 103.296 -0.192 – -0.03 -2.51 –

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– 1.53 0.59 0.51 204 -0.147 234 0.55 –
Almeida et al. 2025 1.59 1.02 – 85 – 260 – –
Zhang et al. 2024 – – – – -0.190(1) – – –
Hunt & Reffert 2024 1.52 0.59 0.51 204 – 390(1) – –
Cavallo et al. 2024 1.66 0.72 – 186 0.010 – – –
Hunt & Reffert 2023 1.52 0.59 0.51 204 – – – –
Almeida et al. 2023 1.53 0.87 – 152 -0.147 208(1) 0.55 –
Just et al. 2023 – – – 543 – 38 – –
Dias et al. 2021 1.59 1.02 – 85 -0.145 – – –
Cantat-Gaudin et al. 2020 1.56 0.61 – 58 – – – –
Kounkel et al. 2020 1.60 0.89 – 117 – – – –
Zhong et al. 2020 1.60(1) 0.25 – 8735 -0.438 – – –
Cantat-Gaudin & Anders 2020 1.60 – – – – – – –
Liu & Pang 2019 – – – 35 -0.250 – – –
Bossini et al. 2019 1.50 0.45 – 67 0.000 – – –
Soubiran et al. 2018 1.60 – – – – – – –
Cantat-Gaudin et al. 2018 1.60 – – – – – – –
Dib et al. 2018 1.43 – – 543 – – – –
Joshi et al. 2016 1.43 0.25 – 543 – – – –
Kharchenko et al. 2016 1.43 0.25 – 543 – – – –
Kharchenko et al. 2013 1.43 0.25 – 543 – – – –
Glushkova et al. 2010 1.33 0.25 – 398 – – – –
Dias et al. 2002 1.43 0.25 – 543 – – – –

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

Visualization
ℹ️
FSR 1085 UCC
FSR 1085 HUNT23
FSR 1085 CANTAT20
Galactocentric position diagram