Herschel 1

(ASCC 41; FSR 1141; MWSC 1337; ADS 6366; MWSC 1335; OCSN 130)

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0.96 UTI
0.78
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 189
Stellar density (N50/rad) 15.9 [N/pc2]
C3 classification AA
  • CN 0.78 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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Herschel 1 is a 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, age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=4, with probability of formation through binary evolution >=0.5 N=1.

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: 0.98 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Richer et al. (2021)
The expected number of WDs is 1.5, 0 WD candidates found, and 0 WD candidates found in the wide search.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010). Asterisms reported by amateur astronomers in the web.

Data
🔍 Search references for Herschel 1 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– 116.7 0.104 3.379 0.674 -3.937 -10.566
Yan et al. 2026 116.708 0.077 3.369 0.669 -3.97 –
Li et al. 2025 116.674 0.137 3.352 0.646 -3.99 –
Wei et al. 2025 116.697 0.101 3.371 0.638 -3.954 –
Almeida et al. 2025 116.665 0.18 – – – –
Alfonso et al. 2024 116.687 0.175 3.345 0.671 -3.944 –
Zhang et al. 2024 116.708 0.077 – – – –
Hunt & Reffert 2024 116.708 0.077 3.369 0.669 -3.97 -10.199
Cavallo et al. 2024 116.693 0.155 3.372 – – –
Hunt & Reffert 2023 116.708 0.077 3.369 0.669 -3.97 -10.199
Almeida et al. 2023 116.581 0.141 – – – –
Qin et al. 2023 116.68 0.17 3.38 0.65 -3.97 -11.19
Just et al. 2023 116.739 0.022 – – – –
He et al. 2022 116.672 0.208 3.383 0.692 -3.953 –
Tarricq et al. 2022 116.674 -0.065 3.37 0.694 -3.94 –
Richer et al. 2021 116.711 0.094 3.35 0.716 -4.004 –
Dias et al. 2021 116.665 0.18 3.361 0.652 -4.03 -10.409
Cantat-Gaudin et al. 2020 116.674 0.137 3.352 0.646 -3.99 –
Zhong et al. 2020 116.674 0.137 – 0.646 -3.99 -15.869
Cantat-Gaudin & Anders 2020 116.674 0.137 3.352 0.646 -3.99 –
Bossini et al. 2019 116.674 0.137 – – – –
Soubiran et al. 2018 116.674 0.137 – – – -10.07
Bica et al. 2019 116.755 0.02 – – – –
Cantat-Gaudin et al. 2018 116.674 0.137 3.352 0.646 -3.99 –
Loktin & Popova 2017 116.76 -0.019 – 1.93 -3.93 –
Sampedro et al. 2017 116.758 0.018 -2.42 -3.04 – –
Joshi et al. 2016 116.745 0.02 – – – –
Kharchenko et al. 2016 116.739 0.022 – – – –
Dias et al. 2014 116.758 0.018 – -2.44 -2.14 –
Kharchenko et al. 2013 116.745 0.02 – 1.76 -3.43 –
Piskunov et al. 2008 116.755 0.02 – – – –
Froebrich et al. 2007 116.667 -0.067 – – – –
Kharchenko et al. 2005 116.76 0.02 – 1.93 -3.93 –
Dias et al. 2002 116.758 0.018 – 1.93 -3.93 –

💡 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– 0.3 0.07 0.4 214 -0.063 134 0.225 –
Yan et al. 2026 – – – 213 – – – –
Li et al. 2025 0.29 0.04 – 93 -0.063 – – –
Wei et al. 2025 0.45 0.73 – 34 -0.250 213 0.22 –
Almeida et al. 2025 0.30 0.08 – 281 – 143 – –
Alfonso et al. 2024 0.30 0.00 – 64 -0.089 – – –
Zhang et al. 2024 – – – – -0.020(1) – – –
Hunt & Reffert 2024 – – – – – 156(1) – –
Cavallo et al. 2024 0.30 0.39 – 115 0.140 – – –
Hunt & Reffert 2023 0.29 0.05 0.40 177 – – – –
Almeida et al. 2023 0.29 0.01 – 100 -0.036 126(1) 0.23 –
Qin et al. 2023 0.33 0.28 – 79 – – – –
Just et al. 2023 – – – 501 – 5 – –
He et al. 2022 – 0.05 – 79 – – – –
Tarricq et al. 2022 0.30 – – 214 – – – –
Richer et al. 2021 – 0.08 – 214 – – – –
Dias et al. 2021 0.30 0.08 – 281 -0.089 – – –
Cantat-Gaudin et al. 2020 0.30 0.00 – 214 – – – –
Kounkel et al. 2020 0.30 0.29 – 251 – – – –
Zhong et al. 2020 0.30(1) 0.07 – 8040 -0.108 – – –
Cantat-Gaudin & Anders 2020 0.30 – – – – – – –
Bossini et al. 2019 0.28 0.07 – 110 0.000 – – –
Soubiran et al. 2018 0.30 – – – – – – –
Cantat-Gaudin et al. 2018 0.30 – – – – – – –
Loktin & Popova 2017 0.42 0.06 – 275 – – – –
Joshi et al. 2016 0.40 0.07 – 501 – 51 – –
Kharchenko et al. 2016 0.40 0.07 – 501 – – – –
Kharchenko et al. 2013 0.40 0.07 – 501 – – – –
Piskunov et al. 2008 0.37 0.06 – 275 – – – –
Kharchenko et al. 2005 0.37 0.06 – 275 – – – –
Dias et al. 2002 0.37 0.06 – 275 – – – –

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

Visualization
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Herschel 1 UCC
Herschel 1 HUNT23
Herschel 1 CANTAT20
Galactocentric position diagram