Direct imaging discovery of a young giant planet orbiting on Solar System scales

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Table 2

Astrometry of HD 135344 Ab.

UT date a	MJD	Instrument	ΔRA ^b (mas)	ΔDec^c (mas)	^ρd
2019 May 09	58612.2	SPHERE/IRDIS	−161.6 ± 2.7	31.6 ± 1.3	−0.33
2019 Jul. 06	58670.0	SPHERE/IRDIS	−162.0 ± 2.0	28.2 ± 1.3	−0.17
2021 Jul. 16	59412.0	SPHERE/IRDIS	−144.8 ± 1.9	36.1 ± 1.2	−0.22
2022 May 04	59703.2	SPHERE/IRDIS	−142.3 ± 5.2	35.8 ± 2.0	−0.58
2022 Jul. 19	59779.06	GRAVITY	−138.21 ± 0.15	36.34 ± 0.17	−0.58
2023 May 08	60072.15	GRAVITY	−130.41 ± 0.20	37.00 ± 0.28	−0.95
2023 Jul. 01	60126.98	GRAVITY	−129.07 ± 0.13	37.36 ± 0.08	−0.97

Notes. ^(a)UT date at the start of the observations. ^(b,c)Coordinates, RA and Dec, relative to the star HD 135344 A. ^(d)The Pearson correlation coefficient, ρ, quantifies the correlation between the uncertainties of ΔRA and ΔDec.

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