- Open Clusters of the Berkeley Catalogue (Ori) -

Aql (6) Cas (18) Cyg (10) Mon (1) Sge (2)
Aur (4) Cep (5) Lyr (1) Ori (3) Vul (2)

Berkeley 21 (OC)

../images/dss/dss1_055146.00_+214836.00_12_web.jpg
Image source: DSS I - 12×12'
Name: Berkeley 21, Berk21, Be21
Type: OC
Constellation: Ori
Coordinates: 05h51m46.00s / +21°48'36.00"
Brightness / Size: 11m1 / 3.5x3.5'
Robert Zebahl
8" f/6, 80x, Bortle 4-, SQM-L 20.8
Quite faint, roundish, slightly condensed. I will observe this cluster again to ensure this sighting.
DIFFICULT

Berkeley 22 (OC)

../images/dss/dss1_055827.00_+074524.00_8_web.jpg
Image source: DSS I - 8×8'
Name: Berkeley 22, Berk22, Be22
Type: OC
Constellation: Ori
Coordinates: 05h58m27.00s / +07°45'24.00"
Brightness / Size: - / 2.0x2.0'
Robert Zebahl
8" f/6, 150x, Bortle 4-, SQM-L 20.8
Conditions in the target region: SQM-L 20.4
Difficult to hold. Very faint, rather compact brightening. I will observe this cluster again to ensure this sighting.
DIFFICULT

Berkeley 72 (OC)

../images/dss/dss1_055012.00_+221500.00_8_web.jpg
Image source: DSS I - 8×8'
Name: Berkeley 72, Berk72, Be72
Type: OC
Constellation: Ori
Coordinates: 05h50m12.00s / +22°15'00.00"
Brightness / Size: - / 5.0x5.0'
Robert Zebahl
8" f/6, 150x, Bortle 4-, SQM-L 20.8
I only saw 3 stars with averted vision. But I'm not sure if they are members of the cluster.
DIFFICULT