Ruprecht 78

(MWSC 1675)

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0.91 UTI
0.8
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 228
Radius (P>50% members) 1.3 [arcmin]
  • CN 0.8 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 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Ruprecht 78 is a rich, very dense object of high C3 quality. Its parallax locates it at a large* distance, below 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 age parameter (see Parameters). It is very well-studied in the literature.

(*): The parallax distance estimate (~8.96 kpc) differs significantly from the median photometric distance (~1.71 kpc).

Relatively close Moderate extinction Massive Near-solar metallicity Very young

Cavallo et al. (2024)
Silver sample.

Data
🔍 Search references for Ruprecht 78 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 – 142.284 -53.699 0.112 -3.872 3.287 52.866
Hunt & Reffert 2024 142.28 -53.699 0.118 -3.838 3.333 77.819
Celli et al. 2024 142.282 -53.696 – – – –
Cavallo et al. 2024 142.123 -53.672 0.118 – – –
Hunt & Reffert 2023 142.28 -53.699 0.118 -3.838 3.333 77.819
Just et al. 2023 142.256 -53.707 – – – –
Cantat-Gaudin et al. 2020 142.282 -53.696 0.097 -3.892 3.252 –
Cantat-Gaudin & Anders 2020 142.282 -53.696 0.097 -3.892 3.252 –
Soubiran et al. 2018 142.282 -53.696 – – – 51.32
Cantat-Gaudin et al. 2018 142.282 -53.696 0.097 -3.892 3.252 –
Loktin & Popova 2017 142.29 -53.699 – -9.771 -1.719 –
Kharchenko et al. 2016 142.256 -53.707 – – – –
Dias et al. 2014 142.292 -53.7 – -2.47 -0.79 –
Kharchenko et al. 2013 142.26 -53.71 – -10.0 5.4 –
Piskunov et al. 2008 142.286 -53.695 – – – –
van den Bergh 2006 142.3 -53.7 – – – –
Kharchenko et al. 2005 142.29 -53.7 – -9.23 5.51 –
Kharchenko et al. 2003 142.3 -53.58 – -9.07 3.57 –
Dias et al. 2002 142.292 -53.7 – -2.14 -1.32 –

💡 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 – – – – – 1760* – –
Celli et al. 2024 – – – 18 – 1250 – –
Cavallo et al. 2024 6.19 3.08 – 110 0.450 – – –
Hunt & Reffert 2023 7.97 3.39 2.83 21 – – – –
Just et al. 2023 – – – 18 – 44 – –
Cantat-Gaudin & Anders 2020 7.96 – – – – – – –
Soubiran et al. 2018 7.96 – – – – – – –
Cantat-Gaudin et al. 2018 7.96 – – – – – – –
Loktin & Popova 2017 1.73 1.10 – 113 – – – –
Kharchenko et al. 2016 1.71 1.35 – 18 – – – –
Kharchenko et al. 2013 1.71 1.35 – 18 – – – –
Piskunov et al. 2008 1.64 1.08 – 14 – – – –
van den Bergh 2006 1.64 1.08 – 98 – – – –
Kharchenko et al. 2005 1.64 1.08 – 14 – – – –
Kharchenko et al. 2003 1.64 1.08 – – – – – –
Dias et al. 2002 1.64 1.08 – 97 – – – –

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

Visualization
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Ruprecht 78 UCC
Ruprecht 78 HUNT23
Ruprecht 78 CANTAT20
Galactocentric position diagram