Hello,
Whilst setting up to attempt to record the faint Globular Cluster UKS 1, I used HP 1 as a warmup target to get all the gear set up, aligned and calibrated. Both clusters were found in ST4 Imaging via the Database Power Search.
R.A. 17h31m05.0s Dec. -29°58'54" (2000) in Ophiuchus
Magnitude: 12.50
Size: 1.2'
Tak Mewlon 210 F11.5
Tak x0.8 Reducer/Flattener
ASI294MM Pro Camera, 4.63u Pixels.
A Plate Solve reported a FL of 2135mm (F10.1) at 0.447 arcsec/pixel.
Discovered by Dufay, Berthier and Morignat in 1954. Independently rediscovered by van den Bergh and Hagen in 1975. Globular Cluster HP 1 was discovered by Dufay et.al. (1954), and sometimes referred to as "HP" for the Haute-Provence Observatory where the discovery occurred (e.g., Sawyer Hogg 1959). This designation was mutated to HP 1 as more globular clusters were discovered at that observatory in the 1960s by Terzan.
Until recently, it was thought that HP 1 is situated close to the Galactic Centre, but recent estimates have put it as far as about 20,000 light years beyond, to a total distance of 46,000 light years from us.
Further information can also be found here.
http://cdsportal.u-strasbg.fr/?target=ESO%20455-11
http://simbad.u-strasbg.fr/simbad/sim-id...BD300F75B1
I have included a DSS Coloured image from Aladin Lite.
Cheers
Dennis
Whilst setting up to attempt to record the faint Globular Cluster UKS 1, I used HP 1 as a warmup target to get all the gear set up, aligned and calibrated. Both clusters were found in ST4 Imaging via the Database Power Search.
R.A. 17h31m05.0s Dec. -29°58'54" (2000) in Ophiuchus
Magnitude: 12.50
Size: 1.2'
Tak Mewlon 210 F11.5
Tak x0.8 Reducer/Flattener
ASI294MM Pro Camera, 4.63u Pixels.
A Plate Solve reported a FL of 2135mm (F10.1) at 0.447 arcsec/pixel.
- L: 60x60 secs
- R; 20x30 secs
- G; 20x30 secs
- B; 20x30 secs
Discovered by Dufay, Berthier and Morignat in 1954. Independently rediscovered by van den Bergh and Hagen in 1975. Globular Cluster HP 1 was discovered by Dufay et.al. (1954), and sometimes referred to as "HP" for the Haute-Provence Observatory where the discovery occurred (e.g., Sawyer Hogg 1959). This designation was mutated to HP 1 as more globular clusters were discovered at that observatory in the 1960s by Terzan.
Until recently, it was thought that HP 1 is situated close to the Galactic Centre, but recent estimates have put it as far as about 20,000 light years beyond, to a total distance of 46,000 light years from us.
Further information can also be found here.
http://cdsportal.u-strasbg.fr/?target=ESO%20455-11
http://simbad.u-strasbg.fr/simbad/sim-id...BD300F75B1
I have included a DSS Coloured image from Aladin Lite.
Cheers
Dennis
