NGC 1798

(Berkeley 16; FSR 0705; MWSC 483; OCL 410; Dolidze 48; LISC 0942)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 567
Core radius and density 1.9 [pc], 10 [pc-2]
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
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
NGC 1798 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (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: good fit. Isochrone match: good fit. Gold sample.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.79 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.79 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.0811, e_all=0.0707.

Rain et al. (2021)
This object probably suffers from differential reddening. We suggest exploring this effect in future works.

Bica et al. (2019)
Analysis of Dolidze objects by M. Kronberger reported in DAML02.

Ahumada & Lapasset (2007)
The cluster parameters are from (1999MNRAS.304..883P).

Data
🔍 Search references for NGC 1798 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– 77.913 47.691 0.203 0.81 -0.366 2.458
Otto et al. 2026 77.908 47.689 – 0.91 -0.32 2.6
Li et al. 2025 77.914 47.691 0.178 0.913 -0.318 –
Guerco et al. 2025 77.9 47.7 0.21 0.76 -0.37 2.73
Hu & Soubiran 2025 77.891 47.697 – – – –
Yang et al. 2025 77.908 47.689 – – – –
Almeida et al. 2025 77.918 47.69 – – – –
Zhang et al. 2024 77.908 47.689 – – – –
Hunt & Reffert 2024 77.908 47.689 0.204 0.792 -0.37 1.626
Cavallo et al. 2024 77.891 47.696 0.206 – – –
Hunt & Reffert 2023 77.908 47.689 0.204 0.792 -0.37 1.626
Just et al. 2023 77.899 47.695 – – – –
Jadhav & Subramaniam 2021 77.914 47.691 – – – –
Jaehnig et al. 2021 77.915 47.692 0.21 0.906 -0.295 –
Netopil et al. 2022 77.913 47.692 – – – 3.43
Rain et al. 2021 77.914 47.691 0.178 0.913 -0.318 –
Dias et al. 2021 77.918 47.69 0.174 0.915 -0.297 2.413
Spina et al. 2021 77.915 47.69 0.18 0.913 -0.301 –
Cantat-Gaudin et al. 2020 77.914 47.691 0.178 0.913 -0.318 –
Donor et al. 2020 77.91 47.695 – 0.83 -0.31 2.7
Zhong et al. 2020 77.914 47.691 – 0.913 -0.318 -1.24
Cantat-Gaudin & Anders 2020 77.914 47.691 0.178 0.913 -0.318 –
Soubiran et al. 2018 77.914 47.691 – – – 2.66
Bica et al. 2019 77.898 47.689 – – – –
Cantat-Gaudin et al. 2018 77.914 47.691 0.178 0.913 -0.318 –
Dias et al. 2018 – – – 0.87 -1.24 –
Loktin & Popova 2017 77.91 47.693 – -0.671 -0.866 -2.0
Sampedro et al. 2017 77.912 47.692 – 0.55 0.16 –
Kharchenko et al. 2016 77.899 47.695 – – – –
Netopil et al. 2016 77.91 47.695 – – – –
Dias et al. 2014 77.912 47.692 – 0.9 -0.16 –
Kharchenko et al. 2013 77.91 47.695 – -1.9 -2.44 –
Gozha et al. 2012 77.913 47.692 – – – –
Kharchenko et al. 2012 77.91 47.695 – -1.9 -2.44 –
Bukowiecki et al. 2011 77.917 47.694 – – – –
Froebrich et al. 2007 77.929 47.695 – – – –
Ahumada & Lapasset 2007 77.9 47.7 – – – –
Dias et al. 2002 77.912 47.692 – 0.9 -0.16 -2.0
Lynga 1987 77.962 47.646 – – – –

💡 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– 4.83 1.48 1.57 1549 -0.266 3352 – 24
Otto et al. 2026 – – – 1660 -0.260(15) – – –
Li et al. 2025 4.67 1.79 – 1210 -0.266 – – –
Guerco et al. 2025 – – – 1660 -0.270 – – –
Hu & Soubiran 2025 – – – – -0.250(5) – – –
Yang et al. 2025 – – – 912 -0.210(3) – – –
Almeida et al. 2025 4.83 1.64 – 1371 – 1888 – –
Zhang et al. 2024 – – – – -0.363(1) – – –
Hunt & Reffert 2024 4.15 1.47 1.57 922 – 3352(1) – –
Cavallo et al. 2024 3.91 1.63 – 1549 -0.310 – – –
Hunt & Reffert 2023 4.16 1.47 1.57 923 – – – –
Deng & Li 2023 4.90 1.59 – 1100 -0.015 – – –
Just et al. 2023 – – – 1995 – 1567 – –
Spina et al. 2022 – – – – -0.270 – – –
Jadhav & Subramaniam 2021 5.13 1.12 – 1660 – 3389 – 3(1)
Jaehnig et al. 2021 4.95(1) – – – – – – –
Netopil et al. 2022 4.57(1) – – 1585 -0.270(1) – – –
Rain et al. 2021 4.83 1.48 – 1778 – – – 27
Dias et al. 2021 4.83 1.64 – 1371 -0.100 – – –
Spina et al. 2021 4.79 – – 1660 -0.267(20) – – –
Cantat-Gaudin et al. 2020 5.13 1.12 – 1660 – – – –
Kounkel et al. 2020 4.43 1.50 – 933 – – – –
Donor et al. 2020 – – – – -0.270 – – –
Zhong et al. 2020 4.83(1) 1.61 – 8900 -0.358 – – –
Cantat-Gaudin & Anders 2020 4.83 – – – – – – –
Soubiran et al. 2018 4.83 – – – – – – –
Cantat-Gaudin et al. 2018 4.83 – – – – – – –
Loktin & Popova 2017 4.15 0.98 – 977 – – – –
Kharchenko et al. 2016 5.25 0.98 – 1995 – – – –
Netopil et al. 2016 12.01 – – 1480 – – – –
Kharchenko et al. 2013 5.25 0.98 – 1995 -0.030 – – –
Bukowiecki et al. 2012 – – – – – 5752 – –
Gozha et al. 2012 4.57 – – 794 -0.250 – – –
Kharchenko et al. 2012 5.25 0.98 – 1995 -0.030 – – –
Bukowiecki et al. 2011 3.83(1) 1.29 – 1122 – – – –
Paunzen et al. 2010 – – – – -0.460 – – –
Ahumada & Lapasset 2007 – 1.61 – 1413 – – – 24
Dias et al. 2002 3.47 1.48 – 1778 -0.120 – – –

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

Visualization
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NGC 1798 UCC
NGC 1798 HUNT23
NGC 1798 CANTAT20
Galactocentric position diagram