Pismis 18

UTI: UCC Trust Index C_N C_dens C_C3 C_lit C_dup 0.87 1.0 1.0 0.85 1.0 Pismis 18 is a rich, very dense object of very high C3 quality. It is well-studied in the literature. This object shares a very small percentage of members with a later reported entry.
C3	N_50	r_50
AA	427	3.0

Search object in SciX | Simbad

Positions

Reference	RA	DEC	Plx	pmRA	pmDE	Rv
Dias et al. (2002)	204.229	-62.093	–	-2.43	-5.11	-27.9
Kharchenko et al. (2012)	204.232	-62.065	–	-8.25	-1.7	–
Cantat-Gaudin et al. (2020)	204.227	-62.091	0.332	-5.658	-2.286	–
Dias et al. (2021)	204.232	-62.096	0.328	-5.672	-2.296	-28.04
Jaehnig et al. (2021)	204.227	-62.091	0.356	-5.66	-2.272	–
Hunt & Reffert (2023)	204.227	-62.091	0.347	-5.692	-2.269	-27.593
Cavallo et al. (2024)	204.213	-62.095	0.347	–	–	–
Hunt & Reffert (2024)	204.227	-62.091	0.347	-5.692	-2.269	-27.593
Hu & Soubiran (2025)	204.213	-62.095	–	–	–	–
UCC	204.23	-62.091	0.347	-5.695	-2.27	-28.578

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Estimated members

1 2 3

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Fundamental parameters

Reference	Values
Dias et al. (2002)	E(B-V)=0.5, Dist=2240.0, Age=9.08
Kharchenko et al. (2012)	e_bv=0.521, distance=2309, log_age=8.975
Cantat-Gaudin et al. (2020)	AVNN=1.81, DMNN=12.28, AgeNN=8.76
Dias et al. (2021)	Av=2.165, Dist=2189, logage=8.832, [Fe/H]=-0.033
Hunt & Reffert (2023)	AV50=2.398, diffAV50=1.217, MOD50=12.13, logAge50=8.509
Cavallo et al. (2024)	AV50=2.03, dMod50=11.6, logAge50=9.0, [Fe/H]50=0.12
Hunt & Reffert (2024)	MassJ=3542.80
Hu & Soubiran (2025)	MA22=-0.25, MA23f=-0.25, MA23g=0.14, MZ23=-0.37, MK24=-0.18, MF24=-0.29

Search coordinates in Bayestar19

Cluster region

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0598	1.6	204.21	-62.08	0.47	-5.48	-2.16	-2.53	0.05