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Object Visibility – STARALT

IMPORTANT: Please note that STARALT is now linked at https://astro.ing.iac.es/staralt/. Please update your records! The URL http://catserver.ing.iac.es/staralt/ is no longer valid.

STARALT is a program that shows the visibility of astronomical objects in various ways: elevation (Staralt) or a sky track (Startrack) on a particular night, or elevation (Starobs) or optimum visibility (Starmult) over a year. See also VISPLOT.

Mode
Night
or date when the local night starts. Staralt, Startrack only.
Observatory

Select one above or specify your own site with this format:
Longitude(°E)Latitude(°N)Altitude(metres)UT-offset(hours)
Ex.: 289.2767 -30.2283 2725 -4
Coordinates
Formats can be any of these:
name hh mm ss ±dd mm ss
name hh:mm:ss ±dd:mm:ss
name ddd.ddd dd.ddd
name must be a single word with no dots, avoid using single numbers. Every entry must be in the same format, do not use different formats with different entries. We recommmend a maximum of 100 targets per submission.

Alternatively, you can upload a file with coordinates. You can use the same format as in the TCS catalog. Target names must be single words with no dots.
Options
 Included on plot. Moon coordinates at ~02:00 UT. Staralt only.
 Min. elevation (or max. airmass X). Starobs, Starmult only.
 Output format
Submit
Telescope limits WHT: 89.8° < Elevation < 12° (plot). Targets with +28:57:40>Dec>+28:33:40 won´t be accessible when transiting the zenital blind spot (~0.2° size).

INT: 90° < Elevation < 33° (20° if lower shutter raised), -6h < HA < +6, +90°>Dec>-30° 09´ 30" (HA-Dec plot - lower shutter raised; lowest altitude-Dec plot).
Help
More These are other useful resources for planning observations: iObserve, astronomy tools, obstools, NOT´s visplot, ASTROCALENDAR_LaPalma.

© 2002 Isaac Newton Group of Telescopes
Developed by Peter Sorensen, Marco Azzaro, Javier Méndez



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Last modified: 14 May 2026
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