Messier 3 (M3 or NGC 5272) is a globular cluster of stars in the northern constellation of Canes Venatici.
This cluster is one of the largest and brightest, and is made up of around 500,000 stars. It is estimated to be 8 billion years old. It is located at a distance of about 33,900 light-years away from Earth.
| Object | M3 - Globular Star Cluster |
|---|---|
| Constellation: | Canes Venatici |
| Position: | RA 13h 42m 11.62s DEC +28° 22′ 38.2″ |
| Apparent Size: | 18 arcmin |
| Apparent Magnitude: | +6.2 (SB 11.0) |
| Distance (average) | 33 kly |
| Photo Datas | |
| Date | 28.03.2019, 20:50 UTC |
| Location | Knottenried/Oberallgäu, 1002m ASL GPS: 47°36’13“ N, 10°11’24“ E |
| Sky darkness SQM-L | Zenit 21.29mag/sqrsec, Object 21.31 mag/sqrsec |
| Ground Temp./Air Pressure | +5.0°C / 1035mbar |
| Thermal sky temp./weather | > -51°C Zenit, very clear, temporarely windy |
| Seeing (Bortle) | 7/10 |
| Telescope | TS 14"RC 2845mm FR f/8.0 |
| Camera | Sony A7Ra mod @ T sensor= +5°C |
| Expose frames | ISO 3200, RAW 8x120s, 8 darks |
| Total expose |
16 min. |
| Filter | no |
| Mount | HPS 10Micron GM 3000 |
| Guiding Cam | no |
| Software | DSS 3.3.4, Photoshop CC |
| Remarks |
C 2019 Peter Cerveny