Feinstein 1

(MWSC 1892)

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0.89 UTI
0.7
CN
1.0
Cdens
1.0
CC3
0.86
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 91
Radius (P>50% members) 5.1 [arcmin]
  • CN 0.7 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.86 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Feinstein 1 is a moderately 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 massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is well-studied in the literature.

(*): The parallax distance estimate (~2.58 kpc) differs significantly from the median photometric distance (~1.16 kpc).

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Feinstein 1 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 – 166.332 -59.744 0.387 -6.692 1.753 -19.392
Hunt & Reffert 2024 166.294 -59.729 0.387 -6.674 1.758 -18.815
Cavallo et al. 2024 166.382 -59.759 0.388 – – –
Hunt & Reffert 2023 166.294 -59.729 0.387 -6.674 1.758 -18.815
Just et al. 2023 166.674 -59.816 – – – –
Jaehnig et al. 2021 166.307 -59.733 0.392 -6.693 1.696 –
Loktin & Popova 2017 166.485 -59.816 – -3.55 -1.79 -13.4
Kharchenko et al. 2016 166.674 -59.816 – – – –
Dias et al. 2014 166.483 -59.817 – -3.55 -1.79 –
Kharchenko et al. 2013 166.68 -59.82 – -6.8 1.32 -13.4
Gozha et al. 2012 166.483 -59.817 – – – –
Piskunov et al. 2008 166.755 -59.815 – – – –
Kharchenko et al. 2007 166.48 -59.82 – 0.4 – -13.43
van den Bergh 2006 166.48 -59.812 – – – –
Kharchenko et al. 2005 166.75 -59.82 – -6.57 2.26 -13.43
Kharchenko et al. 2003 166.5 -59.81 – -6.12 3.9 –
Dias et al. 2002 166.483 -59.817 – -3.55 -1.79 2.2

💡 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
Hunt & Reffert 2024 – – – – – 1358* – –
Cavallo et al. 2024 2.21 1.31 – 19 -0.100 – – –
Hunt & Reffert 2023 2.53 1.40 2.02 26 – – – –
Just et al. 2023 – – – 16 – 202 – –
Jaehnig et al. 2021 2.57* – – – – – – –
Loktin & Popova 2017 0.99 1.24 – 10 – – – –
Kharchenko et al. 2016 1.41 1.42 – 16 – – – –
Kharchenko et al. 2013 1.41 1.42 – 16 – – – –
Gozha et al. 2012 1.16 – – 10 – 4074 – –
Piskunov et al. 2008 1.16 1.30 – 9 – – – –
van den Bergh 2006 1.16 1.24 – 10 – – – –
Kharchenko et al. 2005 1.16 1.30 – 9 – – – –
Kharchenko et al. 2003 1.16 0.93 – – – – – –
Dias et al. 2002 1.16 1.24 – 10 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 266 100.0 166.35 -59.75 0.38 -6.69 1.75 -16.86 0.29
CWWDL 2200 67.0 166.3 -59.72 0.39 -6.7 1.78 -19.39 0.03

💡 Note: The % column shows the percentage of members that Feinstein 1 shares with each listed object.

Visualization
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Feinstein 1 UCC
Feinstein 1 HUNT23
Galactocentric position diagram