Open clusters in the outer disc studied with GTC/MEGARA - Auner 1 and Berkeley 102

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Table 2

Properties of the two clusters.

Cluster	α_ICRS (deg)	δ_ICRS (deg)	Age (Ga)	Distance (kpc)	X (kpc)	Y (kpc)	Z (kpc)	R_GC (kpc)	A_V (mag)
Auner 1	106.06	−19.748	3.2 ± 0.7	7.46 $_{- 0.57}^{+ 0.66}$ $^{+0.66}_{-0.57}$	−12.7 ± 0.4	−5.9 ± 0.5	−0.78 ± 0.06	14.1 ±0.5	1.35 ± 0.03
Berkeley 102	354.66	56.637	3.2 ± 0.7	${8.26}_{- 0.91}^{+ 1.16}$ $8.26^{+1.16}_{-0.91}$	−11.40 ± 0.05	7.7 ± 1.1	−0.68 ± 0.10	13.8 ± 1.0	1.32 ± 0.12

	N_RV	v_rad,OC	σ_{v_rad,OC}	e_{v_rad,OC}	v_GSR	v_RSR	U_s	V_s	W_s	V_φ
		(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(km s⁻¹)
Auner 1	4	37.17	0.66	0.33	−68.0 ± 0.7	25.3 ± 2.7	−25.5 ± 2.8	−38.5 ± 2.8	0.8 ± 5.9	182.9 ± 2.9
Berkeley 102	3	−86.85	3.45	1.99	139.6 ± 3.6	30.3 ± 4.2	−22.8 ± 4.1	−4.2 ± 3.1	20.4 ± 4.1	217.1 ± 3.4

	N_ABU	[Fe/H]	[Ca/Fe]	[Ti/Fe]	[Co/Fe]	[Ni/Fe]	[Ba/Fe]	[Eu/Fe]
		(dex)	(dex)	(dex)	(dex)	(dex)	(dex)	(dex)
Auner 1	3	−0.30 ± 0.10	0.17 ± 0.18	0.20 ± 0.26^a	0.05 ±0.17^a	0.05 ± 0.08	0.22 ± 0.10	−
Berkeley 102	3	−0.35 ± 0.07	0.19 ± 0.15	0.12 ± 0.09	−0.02 ± 0.10	0.01 ± 0.05	0.33 ± 0.14	0.64 ± 0.05 ^a

Notes. First rows: Main cluster parameters derived from Gaia DR3 (see Sect. 3.1 for details). Middle rows: kinematics (Sects. 3.3 through 3.5). Bottom rows: chemical abundances derived from MEGARA spectra (Sect. 4).^(a)Based on only two stars.

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