NGC 1907

(Melotte 35; Collinder 66; MWSC 552; OCL 434; FSR 0774)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 562
Stellar density (N50/rad) 63.2 [N/pc2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 1907 is a very rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

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

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 classes: 0.99 (50th percentile), true positive (human-assigned).

Ahumada & Lapasset (2007)
The diagrams in (1961PUSNO..17..343H), (1964AnWie..26...37P), and (1999AJ....117..937S) were examined. Stars G and 4 have spectra B9V and B3V (1965ApJS...12..215H). Star B is HD 281143. Stars 10, 51, 116, and 132 (WEBDA numbers) appear as stragglers in some diagrams, but as main-sequence stars in others.

Data
πŸ” Search references for NGC 1907 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 82.039 35.33 0.624 -0.12 -3.403 1.904
Otto et al. 2026 82.029 35.324 – -0.04 -3.42 2.7
Li et al. 2025 82.033 35.33 0.611 -0.04 -3.418 –
Guerco et al. 2025 82.0 35.3 0.64 -0.18 -3.45 2.68
Hu & Soubiran 2025 82.037 35.328 – – – –
Almeida et al. 2025 82.067 35.324 – – – –
Zhang et al. 2024 82.029 35.324 – – – –
Hunt & Reffert 2024 82.029 35.324 0.625 -0.141 -3.41 -0.346
Cavallo et al. 2024 82.037 35.328 0.624 – – –
Hunt & Reffert 2023 82.029 35.324 0.625 -0.141 -3.41 -0.346
Almeida et al. 2023 82.058 35.324 – – – –
Just et al. 2023 82.01 35.325 – – – –
Jadhav & Subramaniam 2021 82.033 35.33 – – – –
Jaehnig et al. 2021 82.032 35.323 0.64 -0.044 -3.418 –
Rain et al. 2021 82.033 35.33 0.611 -0.04 -3.418 –
Dias et al. 2021 82.067 35.324 0.622 0.005 -3.415 –
Spina et al. 2021 82.032 35.329 0.61 -0.045 -3.423 –
Cantat-Gaudin et al. 2020 82.033 35.33 0.611 -0.04 -3.418 –
SΓ‘nchez et al. 2020 82.021 35.325 – -0.036 -3.387 –
Donor et al. 2020 82.02 35.325 – -0.06 -3.54 2.8
Zhong et al. 2020 82.033 35.33 – -0.04 -3.418 -5.323
Cantat-Gaudin & Anders 2020 82.033 35.33 0.611 -0.04 -3.418 –
Soubiran et al. 2018 82.033 35.33 – – – 2.78
Bica et al. 2019 82.025 35.327 – – – –
Cantat-Gaudin et al. 2018 82.033 35.33 0.611 -0.04 -3.418 –
Loktin & Popova 2017 82.02 35.326 – 0.123 -1.706 0.1
Kharchenko et al. 2016 82.01 35.325 – – – –
Dias et al. 2014 82.021 35.325 – -0.85 -4.22 –
Kharchenko et al. 2013 82.02 35.325 – 0.85 -5.7 0.1
Gozha et al. 2012 82.021 35.325 – – – –
Kharchenko et al. 2012 82.02 35.325 – 0.85 -5.7 0.09
Bukowiecki et al. 2011 82.217 35.322 – – – –
Piskunov et al. 2008 82.008 35.329 – – – –
Kharchenko et al. 2007 82.02 35.33 – 0.22 – –
Ahumada & Lapasset 2007 82.025 35.333 – – – –
van den Bergh 2006 82.025 35.325 – – – –
Kharchenko et al. 2005 82.02 35.33 – 0.15 -3.4 –
Kharchenko et al. 2003 82.03 35.33 – -0.66 -4.03 –
Chen et al. 2003 82.001 35.338 – -1.88 -1.63 0.1
Dias et al. 2002 82.021 35.325 – -1.88 -1.63 0.1
Lynga 1987 82.015 35.321 – – – –
Sulentic et al. 1973 82.018 35.32 – – – –

πŸ’‘ 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– 1.56 1.32 1.3 427 -0.100 759 0.53 1
Otto et al. 2026 – – – 589 -0.100(15) – – –
Li et al. 2025 1.57 1.21 – 843 -0.065 – – –
Guerco et al. 2025 – – – 590 -0.110 – – –
Hu & Soubiran 2025 – – – – -0.160(5) – – –
Almeida et al. 2025 1.53 1.36 – 822 – 90 – –
Zhang et al. 2024 – – – – -0.134(1) – – –
Hunt & Reffert 2024 – – – – – 2077(1) – –
Cavallo et al. 2024 1.67 1.29 – 646 0.360 – – –
Hunt & Reffert 2023 1.49 1.12 1.30 577 – – – –
Almeida et al. 2023 1.45 1.50 – 653 -0.115 677(1) 0.53 –
Just et al. 2023 – – – 398 – 237 – –
Spina et al. 2022 – – – – -0.080 – – –
Jadhav & Subramaniam 2021 1.62 1.28 – 589 – 1719 – 0(1)
Jaehnig et al. 2021 1.55(1) – – – – – – –
Rain et al. 2021 1.56 1.64 – 316 – – – 1
Dias et al. 2021 1.53 1.36 – 822 -0.058 – – –
Spina et al. 2021 1.65 – – 589 -0.079(20) – – –
Cantat-Gaudin et al. 2020 1.62 1.28 – 589 – – – –
Kounkel et al. 2020 1.65 1.46 – 417 – – – –
Donor et al. 2020 – – – – -0.080 – – –
Zhong et al. 2020 1.56(1) 1.58 – 8600 -0.283 – – –
Cantat-Gaudin & Anders 2020 1.56 – – – – – – –
Soubiran et al. 2018 1.56 – – – – – – –
Cantat-Gaudin et al. 2018 1.56 – – – – – – –
Loktin & Popova 2017 1.60 1.31 – 379 – – – –
Kharchenko et al. 2016 1.60 1.58 – 398 – – – –
Kharchenko et al. 2013 1.60 1.58 – 398 – – – –
Bukowiecki et al. 2012 – – – – – 810 – –
Gozha et al. 2012 1.80 – – 316 – 759 – –
Kharchenko et al. 2012 1.60 1.58 – 398 – – – –
Bukowiecki et al. 2011 1.54(1) 1.29 – 562 – – – –
Piskunov et al. 2008 1.33 1.32 – 87 – – – –
Ahumada & Lapasset 2007 – 1.32 – 372 – – – 6
van den Bergh 2006 1.56 1.32 – 372 – – – –
Kharchenko et al. 2005 1.33 1.32 – 87 – – – –
Kharchenko et al. 2003 1.56 1.32 – – – – – –
Chen et al. 2003 1.56 – – 360 – – – –
Dias et al. 2002 1.80 1.64 – 316 – – – –
Lynga 1987 1.38 1.42 – 437 -0.100 – – –

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

Visualization
ℹ️
NGC 1907 UCC
NGC 1907 HUNT23
NGC 1907 CANTAT20
Galactocentric position diagram