Hogg 22

(MWSC 2459; OCL 981; ESO 277 11)

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0.88 UTI
0.41
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 41
Radius (P>50% members) 2.6 [arcmin]
  • CN 0.41 Poorly populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Hogg 22 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near 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 age and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Hogg 22 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 251.653 -47.082 0.357 -0.761 -1.983 –
Li et al. 2025 251.66 -47.078 0.343 -0.75 -2.013 –
Almeida et al. 2025 251.66 -47.078 – – – –
Hunt & Reffert 2024 251.651 -47.089 0.353 -0.785 -2.027 -41.606
Cavallo et al. 2024 251.691 -47.178 0.354 – – –
Hunt & Reffert 2023 251.651 -47.089 0.353 -0.785 -2.027 -41.606
Almeida et al. 2023 251.659 -47.079 – – – –
Jaehnig et al. 2021 251.662 -47.073 0.357 -0.734 -1.953 –
Dias et al. 2021 251.66 -47.078 0.343 -0.75 -2.013 –
SΓ‘nchez et al. 2020 251.654 -47.083 – -0.775 -2.355 –
Bica et al. 2019 251.64 -47.089 – – – –
Loktin & Popova 2017 251.655 -47.084 – -1.369 -2.023 -65.2
Kharchenko et al. 2016 251.644 -47.09 – – – –
Dias et al. 2014 251.654 -47.083 – -1.14 -0.67 –
Kharchenko et al. 2013 251.655 -47.09 – -2.4 -2.2 -65.2
Gozha et al. 2012 251.654 -47.083 – – – –
Piskunov et al. 2008 251.65 -47.082 – – – –
Kharchenko et al. 2007 251.65 -47.08 – 0.08 – -65.2
van den Bergh 2006 251.646 -47.083 – – – –
Kharchenko et al. 2005 251.65 -47.08 – -0.84 -4.39 -65.2
Dias et al. 2002 251.654 -47.083 – -1.14 -0.67 -66.74
Dambis 1999 251.654 -47.083 – – – –

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] Bfr BSS
Li et al. 2025 1.76 1.38 – 606 0.147 – – –
Almeida et al. 2025 2.35 2.10 – 12 – 294 – –
Hunt & Reffert 2024 – – – – – 1145* – –
Cavallo et al. 2024 2.42 2.14 – 10 0.320 – – –
Hunt & Reffert 2023 2.57 2.07 0.93 8 – – – –
Almeida et al. 2023 2.42 2.17 – 9 0.064 444* 0.55 –
Jaehnig et al. 2021 2.80* – – – – – – –
Dias et al. 2021 2.35 2.10 – 12 0.120 – – –
Loktin & Popova 2017 1.30 2.01 – 6 – – – –
Kharchenko et al. 2016 2.80 2.55 – 6 – – – –
Kharchenko et al. 2013 2.80 2.55 – 6 – – – –
Gozha et al. 2012 1.22 – – 6 – 85 – –
Piskunov et al. 2008 1.30 2.02 – 5 – – – –
van den Bergh 2006 1.22 2.02 – 6 – – – –
Kharchenko et al. 2005 1.30 2.02 – 5 – – – –
Dias et al. 2002 1.22 2.01 – 6 – – – –
Dambis 1999 2.40 2.22 – 3 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 547 97.6 251.66 -47.09 0.34 -0.75 -1.98 -15.92 0.23

πŸ’‘ Note: The % column shows the percentage of members that Hogg 22 shares with each listed object.

Visualization
ℹ️
Hogg 22 UCC
Hogg 22 HUNT23
Galactocentric position diagram