Ancient ‘ghost’ planetary nebulae discovered with amateur telescopes

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Table 2

Candidate central stars.

Name	Candidate central star	Geometric distance^a	Proper motion^b		Position angle^c
			μ_α cos δ (mas/yr)	μ_δ (mas/yr)	(degrees)
JAM 2	Gaia DR3 2795519553550625536	397±6 pc	25.1±0.1	−11.53±0.07	114.7±0.1
JAM 3	Gaia DR3 2265067757936901760	${2.1}_{- 0.5}^{+ 0.7}$ $Mathematical equation: $\[2.1_{-0.5}^{+0.7}\]$$ kpc	−1.9±0.2	−0.7±0.3	249±7
JAM 4	Gaia DR3 1095335102795586944	${1.05}_{- 0.10}^{+ 0.11}$ $Mathematical equation: $\[1.05_{-0.10}^{+0.11}\]$$ kpc	4.7±0.2	2.5±0.3	62±2

Notes. ^(a)Bailer-Jones et al. (2021). ^(b)Corrected for Galactic rotation following Martínez et al. (2023). ^(c)The position angle of the proper motion vector following the correction for Galactic rotation.

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