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Compass and Scale File for K 4-55
About the Object
- R.A. PositionR.A. PositionRight ascension – analogous to longitude – is one component of an object's position.20h 45m 10.01s
- Dec. PositionDec. PositionDeclination – analogous to latitude – is one component of an object's position.44° 39' 14.58"
- ConstellationConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.Cygnus
- DistanceDistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.4,600 light-years (1.4 kiloparsecs)
- DimensionsDimensionsThe physical size of the object or the apparent angle it subtends on the sky.This image is roughly 61 arcseconds (1.5 light-years or 0.47 parsec) wide.
About the Data
- Data DescriptionData DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.The image was created from Hubble data from proposal 11956: K. Noll, Z. Levay, M. Mutchler, L. Frattare, M. Livio, W. Januszewski, C. Christian, F. Hamilton, and H. Bond (Hubble Heritage Team/STScI). R. Sahai and J. Trauger (JPL) consulted on the target. - InstrumentInstrumentThe science instrument used to produce the data.HST>WFPC2
- Exposure DatesExposure DatesThe date(s) that the telescope made its observations and the total exposure time.May 4, 2009, Exposure Time: 2 hours
- FiltersFiltersThe camera filters that were used in the science observations.F502N ([O III]), F656N (H-alpha), and F658N ([N II])
- Object NameObject NameA name or catalog number that astronomers use to identify an astronomical object.PN K 4-55, Kohoutek 4-55, PN G084.2+01.0
- Object DescriptionObject DescriptionThe type of astronomical object.Planetary Nebula
- Release DateMay 10, 2009
- Science ReleaseHubble Photographs a Planetary Nebula to Commemorate Decommissioning of Super Camera
- Credit
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.
The image is a composite of separate exposures made by the WFPC2 instrument on the Hubble Space Telescope. Three filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Blue: F502N ([O III]) Green: F656N (H-alpha) Red: F658N ([N II])
Compass and Scale
Compass and ScaleAn astronomical image with a scale that shows how large an object is on the sky, a compass that shows how the object is oriented on the sky, and the filters with which the image was made.
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Last Updated
Mar 28, 2025
Contact
Media
Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov
