Stock 2

(MWSC 173; FoF 2408; OCSN 265)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 2019
Core radius and density 2.0 [pc], 22 [pc-2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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 2 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age 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.

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=36, with probability of formation through binary evolution >=0.5 N=21.

Palma et al. (2025)
Classified as optical pair P291, along with CWNU_1076.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Richer et al. (2021)
The expected number of WDs is 31.3, 2 WD candidates found, and 0 WD candidates found in the wide search.

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2314, e_all=0.3842.

Ahumada & Lapasset (2007)
Adopted cluster centre: star 69 in (1967ApJ...147..988K). Star 2=HD 13088 (member?), star 161=HD 14172 (non-member?), star 164=HD 14183 (member?), according to (1967ApJ...147..988K); their spectra are A1V, A2V, A0V, respectively (1974AJ.....79..107M).

Data
🔍 Search references for Stock 2 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 33.861 59.556 2.669 15.838 -13.729 8.817
Yan et al. 2026 33.85 59.577 2.675 15.829 -13.713 –
Bijavara Seshashayana et al. 2025 33.37 59.335 – – – –
Otto et al. 2026 33.85 59.577 – 15.97 -13.63 10.6
Li et al. 2025 33.856 59.522 2.641 15.966 -13.627 –
Yang et al. 2025 33.85 59.577 – – – –
Wei et al. 2025 33.892 59.542 2.662 15.811 -13.729 –
Almeida et al. 2025 33.853 59.537 – – – –
Alfonso et al. 2024 33.865 59.523 2.645 15.824 -13.754 –
Zhang et al. 2024 33.85 59.577 – – – –
Hunt & Reffert 2024 33.85 59.577 2.675 15.829 -13.713 8.168
Cavallo et al. 2024 33.768 59.545 2.671 – – –
Hunt & Reffert 2023 33.85 59.577 2.675 15.829 -13.713 8.168
Qin et al. 2023 33.88 59.52 2.68 15.82 -13.78 8.57
Just et al. 2023 33.648 59.438 – – – –
He et al. 2022 33.899 59.56 2.674 15.812 -13.75 –
Tarricq et al. 2022 33.88 59.45 2.662 15.816 -13.748 –
Jadhav & Subramaniam 2021 33.856 59.522 – – – –
Jaehnig et al. 2021 33.813 59.542 2.665 15.886 -13.599 –
Rain et al. 2021 33.856 59.522 2.641 15.966 -13.627 –
Richer et al. 2021 33.847 59.547 2.643 15.857 -13.705 –
Dias et al. 2021 33.853 59.537 2.641 15.845 -13.698 8.757
Spina et al. 2021 33.815 59.549 2.638 15.848 -13.682 –
Cantat-Gaudin et al. 2020 33.856 59.522 2.641 15.966 -13.627 –
Zhong et al. 2020 33.856 59.522 – 15.966 -13.627 1.55
Cantat-Gaudin & Anders 2020 33.856 59.522 2.641 15.966 -13.627 –
Liu & Pang 2019 33.832 59.562 2.638 15.841 -13.673 –
Soubiran et al. 2018 33.856 59.522 – – – 8.19
Cantat-Gaudin et al. 2018 33.856 59.522 2.641 15.966 -13.627 –
Dib et al. 2018 33.66 59.44 – – – –
Loktin & Popova 2017 33.675 59.485 – 1.744 -1.948 1.8
Sampedro et al. 2017 33.679 59.485 – 16.03 -13.53 –
Joshi et al. 2016 33.66 59.44 – – – –
Kharchenko et al. 2016 33.648 59.438 – – – –
Netopil et al. 2016 33.679 59.485 – – – –
Dias et al. 2014 33.679 59.485 – -0.24 -0.51 –
Kharchenko et al. 2013 33.66 59.44 – 16.13 -14.5 1.8
Gozha et al. 2012 33.679 59.485 – – – –
Kharchenko et al. 2012 33.66 59.44 – 16.13 -14.5 1.81
Piskunov et al. 2008 33.588 59.263 – – – –
Kharchenko et al. 2007 33.67 59.49 – 2.8 – -2.85
Piskunov et al. 2007 33.588 59.263 – – – –
Ahumada & Lapasset 2007 33.75 59.267 – – – –
van den Bergh 2006 33.6 59.267 – – – –
Kharchenko et al. 2005 33.6 59.27 – 16.22 -13.39 -2.85
Kharchenko et al. 2003 33.69 59.39 – 16.49 -13.16 –
Dias et al. 2002 33.679 59.485 – 17.29 -13.1 -41.14
Lynga 1987 33.73 59.228 – – – 2.0

💡 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– 0.38 1.07 2.02 275 -0.055 3319 0.59 0
Yan et al. 2026 – – – 398 – – – –
Bijavara Seshashayana et al. 2025 – 0.50 – 400 0.010(14) – – –
Otto et al. 2026 – – – 398 -0.050(15) – – –
Li et al. 2025 0.37 0.81 – 606 0.054 – – –
Yang et al. 2025 – – – 288 -0.060(3) – – –
Wei et al. 2025 0.42 1.01 – 245 0.250 1520 0.59 –
Almeida et al. 2025 0.37 0.79 – 804 – 1753 – –
Alfonso et al. 2024 0.40 0.50 – 1094 0.032 – – –
Zhang et al. 2024 – – – – -0.081(1) – – –
Hunt & Reffert 2024 0.36 0.90 2.02 290 – 3319(1) – –
Cavallo et al. 2024 0.38 1.23 – 234 0.290 – – –
Hunt & Reffert 2023 0.36 0.90 2.02 290 – – – –
Qin et al. 2023 0.50 0.79 – 355 – – – –
Just et al. 2023 – – – 275 – 2075 – –
He et al. 2022 – 1.30 – 282 – – – –
Tarricq et al. 2022 0.43 – – 398 – – – –
Jadhav & Subramaniam 2021 0.40 0.50 – 398 – 2828 – 0(1)
Jaehnig et al. 2021 0.38(1) – – – – – – –
Rain et al. 2021 0.37 1.20 – 170 – – – 0
Richer et al. 2021 – 0.92 – 225 – – – –
Dias et al. 2021 0.37 0.79 – 804 0.029 – – –
Spina et al. 2021 0.38 – – 398 – – – –
Cantat-Gaudin et al. 2020 0.40 0.50 – 398 – – – –
Kounkel et al. 2020 0.40 0.66 – 490 – – – –
Zhong et al. 2020 0.37(1) 1.07 – 8440 -0.106 – – –
Cantat-Gaudin & Anders 2020 0.37 – – – – – – –
Liu & Pang 2019 – – – 676 0.250 – – –
Soubiran et al. 2018 0.37 – – – – – – –
Cantat-Gaudin et al. 2018 0.37 – – – – – – –
Dib et al. 2018 0.40 – – 275 – – – –
Loktin & Popova 2017 0.39 1.05 – 164 – – – –
Joshi et al. 2016 0.40 1.07 – 275 – 9772 – –
Kharchenko et al. 2016 0.40 1.07 – 275 – – – –
Netopil et al. 2016 8.23 – – 160 – – – –
Kharchenko et al. 2013 0.40 1.07 – 275 -0.140 – – –
Gozha et al. 2012 0.30 – – 170 -0.140 9772 – –
Kharchenko et al. 2012 0.40 1.07 – 275 -0.140 – – –
Paunzen et al. 2010 – – – – -0.140 – – –
Piskunov et al. 2008 0.38 1.07 – 148 – 24155(1) – –
Piskunov et al. 2007 0.38 1.07 – 148 – 12677 – –
Ahumada & Lapasset 2007 – 1.20 – 170 – – – 3
van den Bergh 2006 0.30 1.20 – 170 – – – –
Kharchenko et al. 2005 0.38 1.07 – 148 – – – –
Kharchenko et al. 2003 0.30 1.20 – – – – – –
Dias et al. 2002 0.30 1.20 – 170 -0.140 – – –
Lynga 1987 0.32 1.32 – 100 – – – –

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

Visualization
ℹī¸
Stock 2 UCC
Stock 2 HUNT23
Stock 2 CANTAT20
Galactocentric position diagram