|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
20180425 19 32 38deg Moon culminate
20180425 22 47 Midnight
20180426 02 44 WNW 12d old Moonset
20180426 03 02 ENE SUNRISE
Day 15 31
20180426 10 47 Midday
20180426 13 34 E 12d old Moonrise
20180426 18 33 WNW SUNSET
Twilight night 08 27
20180426 20 21 34deg Moon culminate
20180426 22 47 Midnight
20180427 03 00 ENE SUNRISE
Day 15 36
20180427 03 00 W 13d old Moonset
20180427 10 47 Midday
20180427 14 58 E 13d old Moonrise
20180427 18 36 WNW SUNSET
Twilight >00 50
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)
- 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.
- Safety information (local access)
- Telescope information
- The flatfield system project
- The dome control project
- The sub-aperture and tube sock project
- Sub-aperture mask (local access)
- Light-shielding tube cover (local access)
- Wind protecting slit cloth (local access)
- Flatfield screen (local access)
- Applying for observing time
- Almanac and observing schedule
- Daytime observations (local access)
- Standard objects
- Observing aids
- 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)
- 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
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.