Observations of semiregulars near Polaris

Here are some observations of neglected semiregular variables near North Pole made by me and partly by Luboš Brát since Summer 2000.

According to GCVS, AD Cep is a SR star with variations between 10.8 and 15.5 mag (pg), period of 166 days and spectrum M6.5 - M8. DFT on our observations suggests period of 167 days but there is probably a second period of 313 days which makes every second minimum deeper. Also, the range of variability is smaller.
According to GCVS, FF Cep is a SRa star with period of 185 days and range of variability 10.3 - 11.2 mag (pg), spectrum M. DFT on our data suggests 190 day period, in perfect agreement with GCVS.
According to GCVS, OU Cep is a SR star with range 11.1 - 12.0 (pg), unknown period and spectrum M8. DFT on our observations suggest period of 127 days.
According to GCVS, CW Dra is a Lb: star with range 10.8 - 11.7 (pg) and spectrum M8. Our observations are just scatter. Further observations are needed.
According to GCVS, IQ Dra is a SRb: star discovered by Hipparcos with range of 8.47 - 8.95 mag (Hp). There can be some variations in our data, but we do not believe them much.

Ondřej Pejcha, 24. 12. 2001

	According to GCVS, AD Cep is a SR star with variations between 10.8 and 15.5 mag (pg), period of 166 days and spectrum M6.5 - M8. DFT on our observations suggests period of 167 days but there is probably a second period of 313 days which makes every second minimum deeper. Also, the range of variability is smaller.
	According to GCVS, FF Cep is a SRa star with period of 185 days and range of variability 10.3 - 11.2 mag (pg), spectrum M. DFT on our data suggests 190 day period, in perfect agreement with GCVS.
	According to GCVS, OU Cep is a SR star with range 11.1 - 12.0 (pg), unknown period and spectrum M8. DFT on our observations suggest period of 127 days.
	According to GCVS, CW Dra is a Lb: star with range 10.8 - 11.7 (pg) and spectrum M8. Our observations are just scatter. Further observations are needed.
	According to GCVS, IQ Dra is a SRb: star discovered by Hipparcos with range of 8.47 - 8.95 mag (Hp). There can be some variations in our data, but we do not believe them much.