S 305

0.02 UTI

0.56

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

0.05

C_dup

C3 classification AA

Number of members (P>50%) 63

Radius (P>50% members) 1.6 [arcmin]

C_N 0.56 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.05 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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S 305 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 very young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 9 years.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

(*): The parallax distance estimate (~4.27 kpc) differs significantly from the median photometric distance (~1.70 kpc).

Relatively close Moderate extinction Very young

Data

🔍 Search references for S 305 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	–	112.515	-18.55	0.234	-1.885	2.357	219.515
Loktin & Popova	2017	112.5	-18.518	–	–	–	–

💡 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
Loktin & Popova	2017	1.70	2.26	–	13	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Mayer 3	95.2	112.52	-18.55	0.23	-1.88	2.36	219.52	0.74

💡 Note: The % column shows the percentage of members that S 305 shares with each listed object.

Visualization

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