NGC 7438

(FSR 0380; MWSC 3682)

Click to load Aladin Lite
0.52 UTI
0.0
CN
0.22
Cdens
0.75
CC3
0.82
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 23
Radius (P>50% members) 19.1 [arcmin]
  • CN 0.0 Sparse
  • Cdens 0.22 Very loose
  • CC3 0.75 High quality
  • Clit 0.82 Well-studied
  • Cdup 1.0 Unique
📥 Members 📊 Colab 🔬 Bayestar19 🔍 SciX 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview
NGC 7438 is a sparse, very loose object of high C3 quality. Its parallax locates it at a 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 parameter (see Parameters). It is well-studied in the literature.
Close Moderate extinction Near-solar metallicity Intermediate age

Hunt & Reffert (2024): Classified as a moving group.

Cavallo et al. (2024): Gold sample.

Data
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 344.793 54.322 1.209 -2.275 -4.264 -34.759
Zhang et al. 2024 344.671 54.251 – – – –
Cavallo et al. 2024 345.645 54.546 1.227 – – –
Hunt & Reffert 2023 344.671 54.251 1.231 -2.204 -4.247 -37.127
Just et al. 2023 344.333 54.371 – – – –
Bica et al. 2019 344.327 54.357 – – – –
Loktin & Popova 2017 344.34 54.339 – -0.535 -0.535 -17.0
Kharchenko et al. 2016 344.333 54.371 – – – –
Kharchenko et al. 2013 344.34 54.375 – 0.01 -1.55 -17.0
Kharchenko et al. 2012 344.34 54.375 – 0.01 -1.55 -17.0
Piskunov et al. 2008 344.326 54.335 – – – –
Kharchenko et al. 2007 344.34 54.34 – 0.23 – -17.0
Piskunov et al. 2007 344.326 54.335 – – – –
Froebrich et al. 2007 344.146 54.251 – – – –
Kharchenko et al. 2005 344.34 54.34 – 1.53 -1.18 –

💡 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
Zhang et al. 2024 – – – – 0.005* – – –
Cavallo et al. 2024 0.83 0.92 – 269 0.460 – – –
Hunt & Reffert 2023 0.77 0.81 0.32 238 – – – –
Just et al. 2023 – – – 631 – 92 – –
Loktin & Popova 2017 2.08 0.28 – 631 – – – –
Kharchenko et al. 2016 1.00 1.08 – 631 – – – –
Kharchenko et al. 2013 1.00 1.08 – 631 – – – –
Kharchenko et al. 2012 1.00 1.08 – 631 – – – –
Piskunov et al. 2008 0.60 1.24 – 851 – 121* – –
Piskunov et al. 2007 0.60 1.24 – 851 – 22 – –
Kharchenko et al. 2005 0.60 1.24 – 851 – – – –

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization
NGC 7438 UCC
NGC 7438 HUNT23
Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.