Hyades

(Melotte 25; Collinder 50; MWSC 379; Taurus Moving Cluster; OCL 456; OCSN 220)

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0.96 UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.91
Clit
1.0
Cdup
N50 (P>50% members) 560
Stellar density (N50/rad) 35.2 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.91 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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Hyades 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 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.

Palma et al. (2025)
Part of multiple system G87, along with FSR_1017 and HSC_1152.

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

Cavallo et al. (2024)
Gold sample.

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

Ahumada & Lapasset (2007)
Star 56 is a cluster member acording to the proper motion and radial velocity study (1952BAN....11..385V). Adopted cluster centre: star 57 of the same reference. References (1985ApJ...294L.103A) and (1982A&A...109...37M) cite star 56 as a blue straggler. Star 56=68 Tauri=HD 27962 has a spectrum A3V and an optical companion of magnitude 9 (1982AJ.....87.1527C). The blue straggler does not show anomalous lithium abundances (1989A&A...220..197B). In (1985ApJ...294L.103A) this star is given a spectrum Am(K/H/M=A2/A3:/A5) and a projected velocity v.sin i=18km/s. It has been suggested (2001ApJ...563..971O) that the white dwarf component of the binary V471 Tauri in this cluster descends from a blue straggler. The selected angular diameter in (1987, Lund Catalogue of Open Cluster Data) is listed.

Data
🔍 Search references for Hyades 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– 67.216 16.761 21.088 102.245 -27.27 39.475
Otto et al. 2026 66.709 16.081 – 103.02 -27.23 40.2
Almeida et al. 2025 67.655 16.842 – – – –
Zhang et al. 2024 66.709 16.081 – – – –
Hunt & Reffert 2024 66.709 16.081 21.232 104.136 -28.732 39.264
Cavallo et al. 2024 67.113 17.255 21.259 – – –
Hunt & Reffert 2023 66.709 16.081 21.232 104.136 -28.732 39.264
Qin et al. 2023 66.77 16.38 20.8 98.32 -26.49 39.44
He et al. 2022 66.943 16.558 21.386 106.447 -26.814 –
Jadhav & Subramaniam 2021 67.447 16.948 – – – –
Jaehnig et al. 2021 66.707 15.852 21.33 106.97 -25.36 –
Dias et al. 2021 67.655 16.842 21.182 103.058 -27.163 39.34
Spina et al. 2021 67.641 16.721 20.94 101.611 -26.684 –
Cantat-Gaudin et al. 2020 67.447 16.948 21.059 103.018 -27.228 –
Bica et al. 2019 66.711 15.872 – – – –
Loktin & Popova 2017 66.72 15.867 – – – 39.29
Kharchenko et al. 2016 66.717 15.867 – – – –
Dias et al. 2014 66.725 15.867 – 1.43 -4.26 –
Gozha et al. 2012 66.725 15.867 – – – –
Kharchenko et al. 2007 66.72 15.87 – 10.0 – –
Ahumada & Lapasset 2007 66.725 15.867 – – – –
van den Bergh 2006 66.725 15.867 – – – –
Chen et al. 2003 66.725 15.871 – – – –
Dias et al. 2002 66.725 15.867 – – – 39.29
Lynga 1987 66.671 15.841 – – – 43.0

💡 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– 0.05 0.03 0.6 787 0.130 193 – 0
Otto et al. 2026 – – – 794 0.020(15) – – –
Almeida et al. 2025 0.05 0.03 – 836 – 184 – –
Zhang et al. 2024 – – – – 0.166(1) – – –
Hunt & Reffert 2024 – – – – – 193(1) – –
Cavallo et al. 2024 0.05 0.48 – 204 -0.040 – – –
Hunt & Reffert 2023 0.05 0.17 0.60 577 – – – –
Qin et al. 2023 0.05 0.13 – 708 – – – –
He et al. 2022 – 0.55 – 562 – – – –
Spina et al. 2022 – – – – 0.150 – – –
Jadhav & Subramaniam 2021 0.05 0.00 – 794 – 373 – 0(1)
Jaehnig et al. 2021 0.05(1) – – – – – – –
Dias et al. 2021 0.05 0.03 – 836 0.149 – – –
Spina et al. 2021 0.05 – – 794 0.145(20) – – –
Cantat-Gaudin et al. 2020 0.05 0.00 – 794 – – – –
Loktin & Popova 2017 0.04 0.03 – 787 – – – –
Kharchenko et al. 2016 0.05 0.03 – 787 – – – –
Gozha et al. 2012 0.04 – – 787 0.130 – – –
Ahumada & Lapasset 2007 – 0.03 – 794 – – – 1
van den Bergh 2006 0.04 0.03 – 794 – – – –
Chen et al. 2003 0.04 0.03 – 780 0.130(1) – – –
Dias et al. 2002 0.04 0.03 – 787 0.130 – – –
Lynga 1987 0.05 0.00 – 661 0.120 – – –

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

Visualization
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Hyades UCC
Hyades HUNT23
Hyades CANTAT20
Galactocentric position diagram