**Table 1:** *uvby* $\beta$ indices obtained for HD 239276 during the 1986-87 run and comparison with those available in the bibliography for HR 8799. Sources: 1) present work; 2) Shuster & Nissen (1986); 3) Zerbi et al. (1999).
Star	b-y	m₁	c₁	$\beta$	Source
	(mag)	(mag)	(mag)	(mag)
HD 239276	0.201	0.132	0.673	2.730	1
HR 8799	0.188	0.137	0.689	2.742	2
HR 8799	0.181	0.142	0.678	2.745	3

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