h17. NGC 488 -- Spiral Galaxy in Psc
23 September 2023, 03:43 UT; Stuart, Florida USA (Bortle 6).
Celestron CPC Deluxe 1100 HD at f/10. QHY294M Pro camera, bin 2x2, exposure 10s, Mono8, gain 3000, quickcapture in Sharpcap, stacked best 192 of 200 frames (selected via DSS score), no filter, no guiding, no calibration frames, sensor 0°C. Processed in DSS and PS.
Notes: developing SOP for observing Herschel 400 targets:
-starsense align and synch on nearby star to ensure goto centers the target in frame.
-use 0°C cooled camera so dark frames unnecessary
-capture 200 subs at 10-12sec
-stack as many good subs as possible for max SNR
Appearance: Large, dim, fat oval galaxy, bright core surrounded by halo of five concentric rings, suggestion of two spiral arms, poor background starfield. Mag. 10 star at 6 o'clock position and mag.8.5 star at 08:30.
from Stellarium:
Azimuth: 110°
Altitude: 44°
Magnitude: 11
Apparent size: 4.5 arcmin
Moon illuminated: 53%
Clouds: partly cloudy
Transparency: 2
Seeing: G
from Wikipedia
NGC 488 is a face-on spiral galaxy in the constellation Pisces. It is at a distance of about 90 million light-years away from Earth. Its diameter is estimated to be 52,6 Kpc (171.000 ly). The galaxy has a large central bulge, and is considered a prototype galaxy with multiple spiral arms. Its arms are tightly wound. Star forming activity has been traced within the arms. The nucleus of NGC 488 has been found to be chemically decoupled, being twice as metal rich as the central bulge of the galaxy. NGC 488, with the exception of its smaller companions, that form NGC 488 group, is an isolated galaxy.
The galaxy was discovered by William Herschel on 13 December 1784. Two supernovae have been observed in NGC 488: SN 1976G (type unknown, mag. 15), and SN 2010eb, (type Ia, mag. 14.7).
h17. NGC 488 -- Spiral Galaxy in Psc
23 September 2023, 03:43 UT; Stuart, Florida USA (Bortle 6).
Celestron CPC Deluxe 1100 HD at f/10. QHY294M Pro camera, bin 2x2, exposure 10s, Mono8, gain 3000, quickcapture in Sharpcap, stacked best 192 of 200 frames (selected via DSS score), no filter, no guiding, no calibration frames, sensor 0°C. Processed in DSS and PS.
Notes: developing SOP for observing Herschel 400 targets:
-starsense align and synch on nearby star to ensure goto centers the target in frame.
-use 0°C cooled camera so dark frames unnecessary
-capture 200 subs at 10-12sec
-stack as many good subs as possible for max SNR
Appearance: Large, dim, fat oval galaxy, bright core surrounded by halo of five concentric rings, suggestion of two spiral arms, poor background starfield. Mag. 10 star at 6 o'clock position and mag.8.5 star at 08:30.
from Stellarium:
Azimuth: 110°
Altitude: 44°
Magnitude: 11
Apparent size: 4.5 arcmin
Moon illuminated: 53%
Clouds: partly cloudy
Transparency: 2
Seeing: G
from Wikipedia
NGC 488 is a face-on spiral galaxy in the constellation Pisces. It is at a distance of about 90 million light-years away from Earth. Its diameter is estimated to be 52,6 Kpc (171.000 ly). The galaxy has a large central bulge, and is considered a prototype galaxy with multiple spiral arms. Its arms are tightly wound. Star forming activity has been traced within the arms. The nucleus of NGC 488 has been found to be chemically decoupled, being twice as metal rich as the central bulge of the galaxy. NGC 488, with the exception of its smaller companions, that form NGC 488 group, is an isolated galaxy.
The galaxy was discovered by William Herschel on 13 December 1784. Two supernovae have been observed in NGC 488: SN 1976G (type unknown, mag. 15), and SN 2010eb, (type Ia, mag. 14.7).