The 90 cm Westerlund Telescope, Ångström Laboratory, Uppsala Lon. 17 38 51.8E, Lat. 59 50 14.9N, Alt. 51 m |
Left to right: Installation, primary mirror, CCD camera, dome shutter opening, telescope truss tube
Local time is UTC+2[hours].
Date UTC-Time Az/Alt/Phase Event Duration
YYYYMMDD HH MM Dir/Deg/Day HH MM
20230921 02 03 Twilight 02 27
20230921 04 30 E SUNRISE
Day 12 23
20230921 10 42 Midday
20230921 13 24 SSE 7d old Moonrise
20230921 15 33 03deg Moon culminate
20230921 16 53 W SUNSET
Twilight 02 26
20230921 17 41 SSW 7d old Moonset
20230921 19 19 Night 06 47
20230921 22 43 Midnight
20230922 02 06 Twilight 02 27
20230922 04 33 E SUNRISE
Day 12 17
20230922 10 42 Midday
20230922 14 59 SSE 8d old Moonrise
20230922 16 33 01deg Moon culminate
20230922 16 50 W SUNSET
Twilight 02 26
20230922 18 07 SSW 8d old Moonset
20230922 19 16 Night >05 43
20230922 22 42 Midnight
Astronomical almanac for this location around the time of the last page load. Times are rounded to the nearest minute.
Red: The Sun rises.
Cyan: Twilight condition.
Green: Astronomical night.
Yellow: The Moon is up during night conditions.
Black: Additional information.
The Westerlund telescope was installed in its 6 m diameter dome on the fifth floor of Ångström Laboratory in October, 2003. It is a 90 cm classical Cassegrain reflector with two Nasmyth foci for semi-permanent mounting of different types of instrumentation. The main purpose of the telescope is undergraduate education and introduction to practical astronomical observation methods. The telescope is also used for professional research projects.
Left to right: M57 observed with the Westerlund Telescope, Rosetta space craft fly-by 050304, Comet 17P Holmes 071119 (median filtered)
Current status
- Double filter wheel and ST1001E camera mounted at left Nasmyth focus.
- UVRI filters installed in internal ST1001E filter wheel (open position available).
- Eyepiece mounted at right Nasmyth focus.
- Tube sock is not mounted.
- Script available to add FITS header keywords during sequence imaging.
Detailed information
- Observatory
- Safety information (local access)
- Telescope information
- The flatfield system project
- The dome control project
- The sub-aperture and tube sock project
- Instrumentation
- Detectors
- Eyepieces
- Filters
- Sub-aperture mask (local access)
- Light-shielding tube cover (local access)
- Wind protecting slit cloth (local access)
- Flatfield screen (local access)
- Observing
- Applying for observing time
- Almanac and observing schedule
- Daytime observations (local access)
- Standard objects
- Observing aids
- Weather
- Observation log
- User manual (local access)
- Data archiving (local access)
- Archive search
- Technical information
- Cabling (local access)
- Control software
- Derotator (local access)
- Dome (local access)
- Errors and problems (local access)
- Filter wheels (local access)
- Hand paddle (local access)
- Maintenance (local access)
- Support equipments (local access)
- Telescope and instrument status (local access)
- Image gallery
- Telescope and site
- Astronomical objects
- Add an image to the gallery (local access)
- Outreach
- Publications
- Undergraduate exam project opportunities in astronomy ("Förslag på examensarbeten")
- Special-event/sky shows/visits
Prof. Nikolai Piskunov
Dr. Ola Karlsson (gallery maintenance)
PhD. Anna Önehag
Contact information
Phone to telescope control room: 018-471 3038
For all telescope/site related inquiries, please send an email to .
Note: The telescope is not open for public nighttime use. Please refer to the telescope shows in the observatory park.
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