The VLT images a "rectangular" planetary nebula
IC 4406 is a planetary nebula with an unusual, almost "rectangular" shape. It is located in the southern constellation Lupus (the Wolf). The distance is somewhat uncertain, possibly around 5,000 light-years. Like the Butterfly Nebula (cf. VLT UT1 First Light Photo No. 4), IC 4406 belongs to the class of bipolar nebulae. However, the dark and dusty central band (the "disc-like structure") is less pronounced in this object and the internal structure is more uniform. The different colours correspond to regions of different composition and physical properties.
This is a combination of two 5-min B (blue) exposures (seeing 0.95 arcsec), two 5-min V (green-yellow) exposures (0.90 arcsec), and one 5-min and two 2-min R (red) exposures (0.70 to 0.90 arcsec) with the VLT Test Camera. Individual frames were flat-fielded and cleaned for cosmics before colour combination; there was no further image processing. The field measures 1.5 x 1.5 arcmin. North is to the upper right; East is to the upper left.
Kredit:ESO
O snímku
Id: | eso9827a |
Typ: | Pozorování |
Datum zveřejnění: | 23. června 1998 |
Související články: | eso9827 |
Velikost: | 2340 x 2557 px |
O objektu
Jméno: | IC 4406 |
Typ: | Milky Way : Nebula : Type : Planetary |
Vzdálenost: | 5000 světelné roky |
Constellation: | Lupus |
Kategorie: | Nebulae |
Souřadnice
Position (RA): | 14 22 26.29 |
Position (Dec): | -44° 9' 5.34" |
Field of view: | 1.43 x 1.51 arcminutes |
Orientace: | Sever je 44.8° pravá od svislé osy |
Barvy & filtry
Pásmo | Dalekohled |
---|---|
Optický B | Very Large Telescope |
Optický V | Very Large Telescope |
Optický R | Very Large Telescope |