Delta Cephei Cluster

0.60 UTI

0.66

C_N

0.83

C_dens

1.0

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 81

Stellar density (N₅₀/rad) 4.2 [N/pc²]

C3 classification AA

C_N 0.66 Moderately populated
C_dens 0.83 Dense
C_C3 1.0 Very high quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Delta Cephei Cluster is a moderately populated, dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is poorly studied in the literature.

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

Very close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 134 along with Theia_117, and of multiple system 4 along with ADS_16795 and Theia_117.

Palma et al. (2025)
Part of multiple system G69, along with Theia_117 and ADS_16795.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for Delta Cephei Cluster in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	335.467	56.638	4.139	16.9	4.724	-14.536
Liu et al.	2025	336.42	57.16	4.11	16.51	4.67	-15.48
Cavallo et al.	2024	334.358	56.042	4.113	–	–	–
Hunt & Reffert	2023	336.424	57.157	4.113	16.506	4.667	-15.482
Bica et al.	2019	335.634	56.565	–	–	–	–

💡 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–	0.25	0.09	0.43	67	0.070	–	–	–
Liu et al.	2025	0.28	0.09	–	71	–	–	–	–
Cavallo et al.	2024	0.25	0.51	–	36	0.070	–	–	–
Hunt & Reffert	2023	0.24	0.07	0.43	67	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 33	79.0	335.08	56.53	4.13	16.79	4.81	-13.98	0.06
Cep OB6	30.9	335.13	56.44	4.13	16.79	4.79	-14.34	0.0

💡 Note: The % column shows the percentage of members that Delta Cephei Cluster shares with each listed object.

Visualization

ℹ️

1 2