Stock 8

(FSR 0780; BDS2003 69)

0.91 UTI

0.81

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 254

Stellar density (N₅₀/rad) 16.2 [N/pc²]

C3 classification AB

C_N 0.81 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Stock 8 is a rich, very dense object of 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 age and metallicity parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with 3 later reported entries. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Stock 8 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–	81.959	34.428	0.462	0.085	-2.343	-59.372
Almeida et al.	2025	81.959	34.496	–	–	–	–
Zhang et al.	2024	82.029	34.421	–	–	–	–
Hunt & Reffert	2024	82.029	34.421	0.47	0.034	-2.348	-51.155
Celli et al.	2024	81.956	34.452	–	–	–	–
Cavallo et al.	2024	81.951	34.548	0.47	–	–	–
Hunt & Reffert	2023	82.029	34.421	0.47	0.034	-2.348	-51.155
Jaehnig et al.	2021	81.959	34.46	0.48	0.106	-2.272	–
Rain et al.	2021	81.956	34.452	0.446	0.094	-2.249	–
Dias et al.	2021	81.959	34.496	0.447	0.1	-2.252	–
Cantat-Gaudin et al.	2020	81.956	34.452	0.446	0.094	-2.249	–
Cantat-Gaudin & Anders	2020	81.956	34.452	0.446	0.094	-2.249	–
Cantat-Gaudin et al.	2018	81.956	34.452	0.446	0.094	-2.249	–
Loktin & Popova	2017	82.035	34.423	–	0.592	-1.905	-6.4
Dias et al.	2014	82.029	34.423	–	-1.07	-3.02	–
Gozha et al.	2012	82.029	34.423	–	–	–	–
Glushkova et al.	2010	82.037	34.431	–	–	–	–
Piskunov et al.	2008	82.026	34.425	–	–	–	–
Kharchenko et al.	2007	82.03	34.42	–	0.25	–	-6.4
Froebrich et al.	2007	81.858	34.403	–	–	–	–
van den Bergh	2006	82.05	34.417	–	–	–	–
Kharchenko et al.	2005	82.03	34.42	–	-1.44	-3.9	-6.4
Kharchenko et al.	2003	81.88	34.43	–	-1.44	-4.35	–
Dias et al.	2002	82.029	34.423	–	-1.07	-3.02	-18.01
Dambis	1999	82.031	34.428	–	–	–	–

💡 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]	B_frac	BSS
UCC	99999–	2.0	1.365	2.26	10	-0.071	2008	–	0.0
Almeida et al.	2025	2.03	1.69	–	10	–	2105	–	–
Zhang et al.	2024	–	–	–	–	-0.060⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	2065⁽¹⁾	–	–
Celli et al.	2024	–	–	–	14	–	1779	–	–
Cavallo et al.	2024	1.79	1.70	–	6	-0.420	–	–	–
Hunt & Reffert	2023	1.96	1.76	2.26	10	–	–	–	–
Jaehnig et al.	2021	2.06⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.11	1.24	–	2	–	–	–	0
Dias et al.	2021	2.03	1.69	–	10	-0.071	–	–	–
Cantat-Gaudin et al.	2020	2.36	1.17	–	14	–	–	–	–
Cantat-Gaudin & Anders	2020	2.11	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.11	–	–	–	–	–	–	–
Loktin & Popova	2017	1.80	1.37	–	12	–	–	–	–
Gozha et al.	2012	2.00	–	–	2	–	1950	–	–
Glushkova et al.	2010	0.90	3.75	–	32	–	–	–	–
Piskunov et al.	2008	1.82	1.36	–	41	–	–	–	–
van den Bergh	2006	1.82	1.36	–	11	–	–	–	–
Kharchenko et al.	2005	1.82	1.36	–	41	–	–	–	–
Kharchenko et al.	2003	1.82	1.36	–	–	–	–	–	–
Dias et al.	2002	2.00	1.24	–	2	–	–	–	–
Dambis	1999	2.15	1.41	–	10	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 1356	11.8	81.86	34.39	0.46	0.17	-1.87	79.39	0.08
FSR 0777	2.0	81.9	34.75	0.47	-0.01	-2.29	–	0.46
Kronberger 1	0.4	82.04	34.78	0.46	-0.04	-2.23	–	0.64

💡 Note: The % column shows the percentage of members that Stock 8 shares with each listed object.

Visualization

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