NGC 884

(MWSC 184)

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0.97 UTI
0.86
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 390
Stellar density (N50/rad) 30.9 [N/pc2]
C3 classification AA
  • CN 0.86 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
NGC 884 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 massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

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

Liu et al. (2025)
Classified as primordial binary cluster 275 along with NGC_869.

Palma et al. (2025)
Classified as genetic pair P239, along with NGC_869.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Ahumada & Lapasset (2007)
= Chi Persei cluster. Star 17=HD 14434 is cited as a blue straggler in (1982A&A...109...37M). According to (1958ApJ...128...31J), star 17 has a spectrum O5.5Vnp, a projected velocity v.sin i=400km/s, and it is a possible variable. The reference (2002ApJ...576..880S) gives stars 17 and 20 spectra O6.5V and A0I. In (1988AJ.....96..635E) the star 2296 (WEBDA) = 19 (ref. 371) = BD+56 574 (sp. B1III) is also cited as a straggler.

Data
🔍 Search references for NGC 884 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– 35.54 57.147 0.401 -0.604 -1.105 -41.613
Almeida et al. 2025 35.629 57.155 – – – –
Zhang et al. 2024 35.519 57.141 – – – –
Hunt & Reffert 2024 35.519 57.141 0.402 -0.614 -1.142 -43.896
Celli et al. 2024 35.584 57.149 – – – –
Cavallo et al. 2024 35.522 57.142 0.403 – – –
Hunt & Reffert 2023 35.519 57.141 0.402 -0.614 -1.142 -43.896
Just et al. 2023 35.501 57.142 – – – –
Jaehnig et al. 2021 35.252 57.145 0.428 -0.636 -1.078 –
Rain et al. 2021 35.584 57.149 0.398 -0.628 -1.066 –
Dias et al. 2021 35.629 57.155 0.398 -0.626 -1.059 –
Cantat-Gaudin et al. 2020 35.584 57.149 0.398 -0.628 -1.066 –
Zhong et al. 2020 35.584 57.149 – -0.628 -1.066 -52.223
Cantat-Gaudin & Anders 2020 35.584 57.149 0.398 -0.628 -1.066 –
Dias et al. 2019 35.596 57.126 0.395 -0.607 -1.049 -43.525
Soubiran et al. 2018 35.584 57.149 – – – -43.01
Cantat-Gaudin et al. 2018 35.584 57.149 0.398 -0.628 -1.066 –
Loktin & Popova 2017 35.595 57.126 – -1.298 0.418 -43.6
Kharchenko et al. 2016 35.501 57.142 – – – –
Dias et al. 2014 35.596 57.126 – -2.29 -0.63 –
Kharchenko et al. 2013 35.512 57.145 – -4.0 1.65 -43.6
Gozha et al. 2012 35.596 57.126 – – – –
Kharchenko et al. 2012 35.512 57.145 – -4.0 1.65 -43.55
Bukowiecki et al. 2011 35.508 57.143 – – – –
Piskunov et al. 2008 35.492 57.134 – – – –
Kharchenko et al. 2007 35.58 57.14 – 1.75 – -37.66
Ahumada & Lapasset 2007 35.575 57.133 – – – –
van den Bergh 2006 35.5 57.133 – – – –
Kharchenko et al. 2005 35.5 57.14 – -0.84 -0.23 -38.14
Kharchenko et al. 2003 35.5 57.14 – -1.81 1.48 –
Chen et al. 2003 35.647 57.103 – -1.14 -1.56 -40.5
Dias et al. 2002 35.596 57.126 – -2.29 -0.63 -42.64
Dambis 1999 35.596 57.125 – – – –
Lynga 1987 35.612 57.11 – – – –
Sulentic et al. 1973 35.62 57.113 – – – –

💡 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– 2.345 1.77 0.82 15 -0.300 2517 – 1
Liu et al. 2025 4.70 0.59 – 15 – – – –
Almeida et al. 2025 2.15 1.71 – 15 – 2741 – –
Zhang et al. 2024 – – – – -0.169(1) – – –
Hunt & Reffert 2024 – – – – – 1656(1) – –
Celli et al. 2024 – – – 18 – 2293 – –
Cavallo et al. 2024 2.56 1.61 – 15 0.150 – – –
Hunt & Reffert 2023 2.39 1.58 0.82 18 – – – –
Just et al. 2023 – – – 16 – 14191 – –
Jaehnig et al. 2021 2.28(1) – – – – – – –
Rain et al. 2021 2.34 1.77 – 13 – – – 0
Dias et al. 2021 2.15 1.71 – 15 -0.079 – – –
Cantat-Gaudin et al. 2020 2.13 1.72 – 18 – – – –
Kounkel et al. 2020 2.43 1.51 – 24 – – – –
Zhong et al. 2020 2.34(1) 1.77 – 7200 -0.186 – – –
Cantat-Gaudin & Anders 2020 2.34 – – – – – – –
Dias et al. 2019 1.99 1.29 – 17 -1.335 – – –
Soubiran et al. 2018 2.34 – – – – – – –
Cantat-Gaudin et al. 2018 2.34 – – – – – – –
Loktin & Popova 2017 2.35 1.75 – 11 – – – –
Kharchenko et al. 2016 2.35 1.77 – 16 – – – –
Kharchenko et al. 2013 2.35 1.77 – 16 -0.300 – – –
Bukowiecki et al. 2012 – – – – – 2008 – –
Gozha et al. 2012 2.94 – – 13 -0.300 1584893 – –
Kharchenko et al. 2012 2.35 1.77 – 16 -0.300 – – –
Bukowiecki et al. 2011 1.91(1) 1.17 – 32 – – – –
Piskunov et al. 2008 2.35 1.77 – 13 – – – –
Ahumada & Lapasset 2007 – 1.77 – 11 – – – 2
van den Bergh 2006 2.35 1.77 – 11 – – – –
Kharchenko et al. 2005 2.35 1.77 – 13 – – – –
Kharchenko et al. 2003 2.33 1.77 – – – – – –
Chen et al. 2003 2.35 – – 10 – – – –
Dias et al. 2002 2.94 1.77 – 13 -0.300 – – –
Dambis 1999 2.00 1.80 – 10 – – – –
Lynga 1987 2.30 1.70 – 3 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0250 2.1 35.52 57.16 0.47 -0.55 -1.11 – 0.04

💡 Note: The % column shows the percentage of members that NGC 884 shares with each listed object.

Visualization
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NGC 884 UCC
NGC 884 HUNT23
NGC 884 CANTAT20
Galactocentric position diagram