Stock 8

(BDSB 69; BDS2003 69; FSR 0780)

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0.91 UTI
0.81
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 254
Stellar density (N50/rad) 16.2 [N/pc2]
C3 classification AB
  • CN 0.81 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 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¸
Stock 8 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with 6 later reported entries. See table with shared members information.

Palma et al. (2025)
Part of multiple system G114, along with HSC_1358 and HSC_1351.

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: 0.89 (50th percentile).

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg17' along with COIN-Gaia 40, Gulliver 53, Kronberger 1 and NGC 1893.

Bica et al. (2003)
Classified as open cluster (IROC).

Data
🔍 Search references for Stock 8 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 81.959 34.428 0.462 0.085 -2.343 -59.372
Almeida et al. 2025 81.959 34.496 – – – –
Zhang et al. 2024 82.029 34.421 – – – –
Hunt & Reffert 2024 82.029 34.421 0.47 0.034 -2.348 -51.155
Celli et al. 2024 81.956 34.452 – – – –
Cavallo et al. 2024 81.951 34.548 0.47 – – –
Hunt & Reffert 2023 82.029 34.421 0.47 0.034 -2.348 -51.155
Jaehnig et al. 2021 81.959 34.46 0.48 0.106 -2.272 –
Rain et al. 2021 81.956 34.452 0.446 0.094 -2.249 –
Dias et al. 2021 81.959 34.496 0.447 0.1 -2.252 –
Cantat-Gaudin et al. 2020 81.956 34.452 0.446 0.094 -2.249 –
Zhong et al. 2020 81.956 34.452 – 0.094 -2.249 -6.713
Cantat-Gaudin & Anders 2020 81.956 34.452 0.446 0.094 -2.249 –
Cantat-Gaudin et al. 2018 81.956 34.452 0.446 0.094 -2.249 –
Loktin & Popova 2017 82.035 34.423 – 0.592 -1.905 -6.4
Dias et al. 2014 82.029 34.423 – -1.07 -3.02 –
Camargo et al. 2012 82.029 34.424 – – – –
Gozha et al. 2012 82.029 34.423 – – – –
Bukowiecki et al. 2011 82.033 34.427 – – – –
Glushkova et al. 2010 82.037 34.431 – – – –
Piskunov et al. 2008 82.026 34.425 – – – –
Kharchenko et al. 2007 82.03 34.42 – 0.25 – -6.4
Froebrich et al. 2007 81.858 34.403 – – – –
Ahumada & Lapasset 2007 81.9 34.417 – – – –
van den Bergh 2006 82.05 34.417 – – – –
Kharchenko et al. 2005 82.03 34.42 – -1.44 -3.9 -6.4
Bica et al. 2003 82.042 34.422 – – – –
Kharchenko et al. 2003 81.88 34.43 – -1.44 -4.35 –
Dias et al. 2002 82.029 34.423 – -1.07 -3.02 -18.01
Dambis 1999 82.031 34.428 – – – –

💡 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– 2.0 1.44 2.26 10 -0.163 1950 – 0
Almeida et al. 2025 2.03 1.69 – 10 – 2105 – –
Zhang et al. 2024 – – – – -0.060(1) – – –
Hunt & Reffert 2024 – – – – – 2065(1) – –
Celli et al. 2024 – – – 14 – 1779 – –
Cavallo et al. 2024 1.79 1.70 – 6 -0.420 – – –
Hunt & Reffert 2023 1.96 1.76 2.26 10 – – – –
Jaehnig et al. 2021 2.06(1) – – – – – – –
Rain et al. 2021 2.11 1.26 – 2 – – – 0
Dias et al. 2021 2.03 1.69 – 10 -0.071 – – –
Cantat-Gaudin et al. 2020 2.36 1.17 – 14 – – – –
Kounkel et al. 2020 2.14 1.75 – 11 – – – –
Zhong et al. 2020 1.73 1.91 – 7050 -0.255 – – –
Cantat-Gaudin & Anders 2020 2.11 – – – – – – –
Cantat-Gaudin et al. 2018 2.11 – – – – – – –
Loktin & Popova 2017 1.80 1.40 – 12 – – – –
Bukowiecki et al. 2012 – – – – – 1046 – –
Camargo et al. 2012 2.69 1.98 – 2 – – – –
Gozha et al. 2012 2.00 – – 2 – 1950 – –
Bukowiecki et al. 2011 1.59(1) 1.55 – 7 – – – –
Glushkova et al. 2010 0.90 3.82 – 32 – – – –
Piskunov et al. 2008 1.82 1.39 – 41 – – – –
Ahumada & Lapasset 2007 – 1.42 – 11 – – – 0
van den Bergh 2006 1.82 1.39 – 11 – – – –
Kharchenko et al. 2005 1.82 1.39 – 41 – – – –
Kharchenko et al. 2003 1.82 1.39 – – – – – –
Dias et al. 2002 2.00 1.26 – 2 – – – –
Dambis 1999 2.15 1.44 – 10 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
BPI 14 19.7 82.08 34.41 0.46 0.22 -2.31 25.03 0.2
CBB 5 19.7 82.05 34.45 0.46 0.14 -2.09 11.91 0.16
HSC 1356 11.8 81.86 34.39 0.46 0.17 -1.87 79.39 0.07
CBB 3 4.7 81.91 34.57 0.46 -0.11 -2.1 – 0.14
FSR 0777 2.0 81.9 34.75 0.47 -0.01 -2.29 – 0.43
Kronberger 1 0.4 82.04 34.78 0.46 -0.04 -2.23 – 0.64

💡 Note: The % column shows the percentage of members that Stock 8 shares with each listed object.

Visualization
ℹī¸
Stock 8 UCC
Stock 8 HUNT23
Stock 8 CANTAT20
Galactocentric position diagram