NGC 2632

(Melotte 88; Collinder 189; MWSC 1527; Praesepe; M 44; OCL 507; OCSN 234)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 1204
Stellar density (N50/rad) 67.8 [N/pc2]
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
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NGC 2632 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, above 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 absorption and age parameters (see Parameters). It is very well-studied in the literature.

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

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=26, with probability of formation through binary evolution >=0.5 N=13.

Palma et al. (2025)
Classified as optical pair P434, along with HSC_1555.

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

Cavallo et al. (2024)
Gold sample.

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

Richer et al. (2021)
The expected number of WDs is 27.8, 11 WD candidates found, and 0 WD candidates found in the wide search.

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=8.87, Av=0.084, [Fe/H]=+0.070 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108). Ahumada & Lapasset (2007A&A...463..789A, Cat. J/A+A/463/789) cite star DR2 661322060465742336 =HD 73666=40 Cancri as a blue straggler, the same star is include in our catalogue.

Ahumada & Lapasset (2007)
= Praesepe. References (1985ApJ...294L.103A) and (1982A&A...109...37M) cite star 265 = HD 73666 = 40 Cancri as a blue straggler. Star 265 is a Si star (spectrum A1IIIp(Si)s) according to (1986PASP...98..307A), but this is not confirmed by (1998A&A...334..139A). Star 300=HD 73731=Epsilon Cnc has an spectrum Am(K/H/M= A5/A6/F0) (1986PASP...98..307A), and is a binary (1999ApJ...521..682A). Both stars are cluster members (1927PGro...41....1K). A spectroscopic study of the four straggler candidates listed in (1995A&AS..109..375A) is presented in (1998A&A...334..139A): besides star 265, the other three stars are not included in the present catalogue, since they rather seem located on the `blue hook.' According to (1998A&A...334..139A), stars 224 = HD 73618 and 265 are Am, star 348 = HD 73819 is Ba-deficient, and star 50 = HD 73210 es metal-deficient. Internal mixing does not seem to be here a plausible mechanism to explain the stragglers (1998A&A...334..139A).

Data
🔍 Search references for NGC 2632 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 130.013 19.605 5.407 -35.927 -12.862 34.728
Yan et al. 2026 130.088 19.666 5.404 -35.943 -12.903 –
Bijavara Seshashayana et al. 2025 129.961 19.541 – – – –
Otto et al. 2026 130.088 19.666 – -36.09 -12.92 35.2
Nizovkina et al. 2025 130.088 19.666 – – – –
Li et al. 2025 130.054 19.621 5.361 -36.09 -12.919 –
Guerco et al. 2025 129.0 19.6 5.42 -35.8 -12.9 35.3
Wei et al. 2025 130.015 19.645 5.408 -35.94 -12.884 –
Almeida et al. 2025 130.057 19.613 – – – –
Alfonso et al. 2024 129.974 19.621 5.368 -35.914 -12.884 –
Zhang et al. 2024 130.088 19.666 – – – –
Hunt & Reffert 2024 130.088 19.666 5.404 -35.943 -12.903 33.941
Cavallo et al. 2024 129.975 19.608 5.405 – – –
Hunt & Reffert 2023 130.088 19.666 5.404 -35.943 -12.903 33.941
Cordoni et al. 2023 130.057 19.613 5.349 -36.148 -12.95 –
Qin et al. 2023 130.06 19.66 5.41 -35.89 -12.9 34.9
He et al. 2022 129.993 19.612 5.41 -35.902 -12.879 –
Tarricq et al. 2022 130.059 19.621 5.416 -35.911 -12.896 –
Jadhav & Subramaniam 2021 130.054 19.621 – – – –
Jaehnig et al. 2021 130.056 19.623 5.385 -35.964 -12.918 –
Rain et al. 2021 130.054 19.621 5.361 -36.09 -12.919 –
Richer et al. 2021 130.079 19.657 5.327 -36.141 -12.843 –
Dias et al. 2021 130.057 19.613 5.349 -36.148 -12.95 34.892
Spina et al. 2021 130.054 19.618 5.347 -36.142 -12.951 –
Cantat-Gaudin et al. 2020 130.054 19.621 5.361 -36.09 -12.919 –
Zhong et al. 2020 130.054 19.621 – -36.09 -12.919 32.149
Cantat-Gaudin & Anders 2020 130.054 19.621 5.361 -36.09 -12.919 –
Bossini et al. 2019 130.054 19.621 – – – –
Soubiran et al. 2018 130.054 19.621 – – – 34.72
Bica et al. 2019 130.057 19.939 – – – –
Cantat-Gaudin et al. 2018 130.054 19.621 5.361 -36.09 -12.919 –
Yen et al. 2018 129.978 19.602 5.39 -36.03 -12.86 –
Loktin & Popova 2017 130.095 19.668 – -35.58 -12.9 33.4
Kharchenko et al. 2016 130.087 19.693 – – – –
Kharchenko et al. 2013 130.095 19.69 – -36.54 -13.36 33.4
Gozha et al. 2012 130.1 19.667 – – – –
Piskunov et al. 2008 130.087 19.689 – – – –
Kharchenko et al. 2007 130.09 19.67 – 3.0 – 33.66
Piskunov et al. 2007 130.087 19.689 – – – –
Ahumada & Lapasset 2007 130.1 19.667 – – – –
van den Bergh 2006 130.1 19.683 – – – –
Kharchenko et al. 2005 130.09 19.69 – -35.9 -12.88 33.57
Kharchenko et al. 2003 130.09 19.69 – -35.83 -13.11 –
Chen et al. 2003 130.053 19.659 – -35.58 -12.9 34.4
Dias et al. 2002 130.1 19.667 – -35.58 -12.9 34.76
Lynga 1987 130.018 19.979 – – – 33.0
Sulentic et al. 1973 130.01 19.994 – – – –

💡 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– 0.19 0.03 0.53 724 0.186 754 0.365 1
Yan et al. 2026 – – – 676 – – – –
Bijavara Seshashayana et al. 2025 – 0.00 – 680 0.180(14) – – –
Otto et al. 2026 – – – 676 0.160(15) – – –
Nizovkina et al. 2025 0.17(4) 0.12(4) – 780(4) 0.051(4) – – –
Li et al. 2025 0.18 0.00 – 784 0.245 – – –
Guerco et al. 2025 – – – 680 0.120 – – –
Wei et al. 2025 0.20 0.60 – 158 0.250 652 0.48 –
Almeida et al. 2025 0.19 0.03 – 762 – 458 – –
Alfonso et al. 2024 0.18 0.00 – 946 0.198 – – –
Zhang et al. 2024 – – – – 0.193(1) – – –
Hunt & Reffert 2024 – – – – – 945(1) – –
Cavallo et al. 2024 0.19 0.60 – 155 0.240 – – –
Hunt & Reffert 2023 0.18 0.16 0.53 346 – – – –
Cordoni et al. 2023 0.19 0.03 – 762 0.196 611 0.25 0(1)
Qin et al. 2023 0.18 0.03 – 708 – – – –
He et al. 2022 – 0.40 – 708 – – – –
Spina et al. 2022 – – – – 0.138 – – –
Tarricq et al. 2022 0.18 – – 692 – – – –
Jadhav & Subramaniam 2021 0.18 0.00 – 676 – 856 – 1(1)
Jaehnig et al. 2021 0.19(1) – – – – – – –
Rain et al. 2021 0.19 0.06 – 741 – – – 1
Richer et al. 2021 – 0.29 – 600 – – – –
Dias et al. 2021 0.19 0.03 – 762 0.196 – – –
Spina et al. 2021 0.19 – – 676 0.133(20) – – –
Cantat-Gaudin et al. 2020 0.18 0.00 – 676 – – – –
Kounkel et al. 2020 0.21 0.29 – 407 – – – –
Zhong et al. 2020 0.19(1) 0.09 – 8875 0.221 – – –
Cantat-Gaudin & Anders 2020 0.19 – – – – – – –
Bossini et al. 2019 0.19 0.08 – 750 0.070 – – –
Soubiran et al. 2018 0.19 – – – – – – –
Cantat-Gaudin et al. 2018 0.19 – – – – – – –
Yen et al. 2018 0.18 0.03 – 794 – – – –
Loktin & Popova 2017 0.19 0.03 – 731 – – – –
Kharchenko et al. 2016 0.19 0.03 – 832 – – – –
Kharchenko et al. 2013 0.19 0.03 – 832 0.094 – – –
Gozha et al. 2012 0.19 – – 729 0.270 302 – –
Piskunov et al. 2008 0.19 0.03 – 794 – 2328(1) – –
Piskunov et al. 2007 0.19 0.03 – 794 – 1807 – –
Ahumada & Lapasset 2007 – 0.03 – 724 – – – 2
van den Bergh 2006 0.19 0.03 – 724 – – – –
Kharchenko et al. 2005 0.19 0.03 – 794 – – – –
Kharchenko et al. 2003 0.18 0.03 – – – – – –
Chen et al. 2003 0.19 0.03 – 720 0.140(1) – – –
Dias et al. 2002 0.19 0.03 – 729 0.270 – – –
Lynga 1987 0.18 0.00 – 661 0.070 – – –

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

Visualization
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NGC 2632 UCC
NGC 2632 HUNT23
NGC 2632 CANTAT20
Galactocentric position diagram