IC 2948

(MWSC 1961)

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0.75 UTI
0.79
CN
1.0
Cdens
1.0
CC3
0.48
Clit
1.0
Cdup
N50 (P>50% members) 195
Stellar density (N50/rad) 24.4 [N/pc2]
C3 classification AA
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.48 Poorly 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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IC 2948 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Palma et al. (2025)
Classified as optical pair P350, along with CWNU_2419.

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

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg09' along with BH 121 and Ruprecht 94.

Data
🔍 Search references for IC 2948 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– 174.88 -63.459 0.401 -5.955 0.65 -11.676
Almeida et al. 2025 174.797 -63.445 – – – –
Hunt & Reffert 2024 174.911 -63.472 0.403 -5.917 0.686 6.018
Cavallo et al. 2024 174.919 -63.464 0.403 – – –
Hunt & Reffert 2023 174.911 -63.472 0.403 -5.917 0.686 6.018
Almeida et al. 2023 174.788 -63.434 – – – –
Just et al. 2023 174.795 -63.506 – – – –
Dias et al. 2021 174.797 -63.445 0.387 -5.981 0.644 –
Cantat-Gaudin et al. 2020 174.822 -63.44 0.388 -5.968 0.647 –
Cantat-Gaudin & Anders 2020 174.822 -63.44 0.388 -5.968 0.647 –
Cantat-Gaudin et al. 2018 174.822 -63.44 0.388 -5.968 0.647 –
Kharchenko et al. 2016 174.795 -63.506 – – – –
Kharchenko et al. 2013 174.802 -63.51 – -4.46 -1.13 -0.3
Piskunov et al. 2008 174.845 -63.475 – – – –
Kharchenko et al. 2007 174.84 -63.47 – 0.08 – 0.0
Kharchenko et al. 2005 174.84 -63.48 – -4.58 -0.35 0.0
van den Bergh & Hagen 1975 174.1 -63.25 – – – –

💡 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– 2.4 1.3 0.8 6 -0.007 726 0.68 –
Almeida et al. 2025 2.37 1.30 – 7 – 426 – –
Hunt & Reffert 2024 – – – – – 233(1) – –
Cavallo et al. 2024 1.94 1.17 – 10 -0.270 – – –
Hunt & Reffert 2023 2.26 1.16 0.80 5 – – – –
Almeida et al. 2023 2.24 1.35 – 7 -0.007 1025(1) 0.68 –
Just et al. 2023 – – – 4 – 1358 – –
Dias et al. 2021 2.37 1.30 – 7 0.026 – – –
Cantat-Gaudin et al. 2020 2.51 1.16 – 6 – – – –
Kounkel et al. 2020 2.43 1.65 – 5 – – – –
Cantat-Gaudin & Anders 2020 2.40 – – – – – – –
Cantat-Gaudin et al. 2018 2.40 – – – – – – –
Kharchenko et al. 2016 2.80 1.64 – 4 – – – –
Kharchenko et al. 2013 2.80 1.64 – 4 – – – –
Piskunov et al. 2008 2.60 0.95 – 6 – – – –
Kharchenko et al. 2005 2.60 0.95 – 6 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
VDBH 121 97.4 174.69 -63.4 0.4 -6.01 0.65 0.02 0.77
VVV 005 13.8 174.74 -63.47 0.4 -5.95 0.51 -45.44 0.0

💡 Note: The % column shows the percentage of members that IC 2948 shares with each listed object.

Visualization
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IC 2948 UCC
IC 2948 HUNT23
IC 2948 CANTAT20
Galactocentric position diagram