Total eclipse of NN Ser

This is a 18.5-min "drift" exposure with VLT ANTU and FORS1 of the sky field around the variable stellar system NN Ser (indicated with an arrow). The telescope moved 1 pixel (0.20 arcsec) every 3 seconds so that the images of the stars in the field are trailed from left to right. After some minutes, the very deep eclipse of NN Ser begins when the brightness drops dramatically during the first partial phase. The star is clearly visible at a constant level all through the total phase at minimum light. It then brightens during the second partial phase and is back to the former level after approximately 10.5 min. The FORS1 instrument was rotated by about 70° to ensure that the trail of NN Ser would not overlap those of the neighbouring stellar images during this special exposure. The field shown measures 2.7 x 2.7 armin 2 and may be compared with that shown in ESO Press Photo eso9936; it has the same orientation.

Källa:

ESO

Om bilden

ID:eso9936b
Typ:Observation
Publiceringsdatum:20 juli 1999
Relaterade pressmeddelanden:eso9936
Storlek:2297 x 2273 px

Om objektet

Namn:NN Serpentis
Typ:Milky Way : Star : Evolutionary Stage : White Dwarf
Milky Way : Star : Grouping : Binary
Milky Way : Sky Phenomenon : Night Sky : Trail : Star
Avstånd:1700 ljusår
Kategori:Stars

Bildformat

Stor jpeg
2,8 MB
Skärmstor jpeg
792,7 kB

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2048x1536
1,7 MB

Färger och filter

BandVåglängdTeleskop

V
550 nmVery Large Telescope
FORS1

Exposure time: 1110s