**Table 3:** Description of used instruments during the exploratory program. FOV (i.e. Col. 4) stands for "Field Of View''.
Observatory	Telescope	Camera	FOV	Notes
BHO	13-cm refractor	SBIG ST10XME	$44'\times 29.5'$
	25-cm Newton	SBIG ST10XME	$34'\times 23'$	f/6
	40-cm Newton	SBIG ST10XME	$26'\times 17.5'$	f/5
HLO	12.5-cm refractor	SBIG ST10XME	$40.5'\times 27.5'$	guidescope of R-C tel.
HLO	1-m Cassegrain	Enzian	$24'\times 12'$	with focal reducer

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