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Compass and Scale Image of M106

Image titled “NGC 4258 M106, Hubble Space Telescope with ground-based images from Robert Gendler and Jay GaBany” with compass arrows, scale bar, and color key.

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    12h 18m 57.49s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    47° 18' 14.29"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Canes Venatici
  • Distance
    DistanceThe 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.
    23.5 million light-years (7,000,000 parsecs)

About the Data

  • Data Description
    Data 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.
    Note: Ground-based image data provided by R. Gendler and J. GaBany was used to fill in or supplement areas where HST data did not exist or was limited. The image was created from Hubble data from proposal 11570: A. Riess (STScI) and collaborators. Other ACS and WFPC2 datasets from various other proposals were used to augment this proposal's data.
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>ACS/WFC, HST>WFPC2, HST>WFC3/UVIS and Ground-based
  • Filters
    FiltersThe camera filters that were used in the science observations.
    ACS/WFC: F435W (G), F555W (V), F606W (V), and F814W (I) WFPC2: F656N (H-alpha) WFC3/UVIS: F555W (V) and F814W (I) ACS/WFC: F814W (I) Ground-based: 656nm (H-alpha)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    M106, NGC 4258
  • Object Description
    Object DescriptionThe type of astronomical object.
    Spiral galaxy
  • Release Date
    February 5, 2013
  • Science Release
    Amateur and Professional Astronomers Team Up to Create a Cosmological Masterpiece
  • Credit
    NASA, ESA, and Z. Levay (STScI)

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Image titled “NGC 4258 M106, Hubble Space Telescope with ground-based images from Robert Gendler and Jay GaBany” with compass arrows, scale bar, and color key.
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.

This image is a composite of separate exposures acquired by various Hubble instruments and ground-based telescopes. Several filters were used to sample various wavelengths/frequencies. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: ACS/WFC F435W (G) Green: WFC3/UVIS F555W (V) + ACS/WFC F555W (V) + ACS/WFC F606W (V) Red: Ground-based 656nm (H-alpha) + WFPC2 F656N (H-alpha) + ACS/WFC F814W (I) + WFC3/UVIS F814W (I) Luminosity: ACS/WFC F814W (I)

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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Details

Last Updated
Mar 14, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov