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Compass and Scale Image of M106

About the Object
- R.A. PositionR.A. PositionRight ascension – analogous to longitude – is one component of an object's position.12h 18m 57.49s
- Dec. PositionDec. PositionDeclination – analogous to latitude – is one component of an object's position.47° 18' 14.29"
- ConstellationConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.Canes Venatici
- 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.23.5 million light-years (7,000,000 parsecs)
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.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. - InstrumentInstrumentThe science instrument used to produce the data.HST>ACS/WFC, HST>WFPC2, HST>WFC3/UVIS and Ground-based
- FiltersFiltersThe 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 NameObject NameA name or catalog number that astronomers use to identify an astronomical object.M106, NGC 4258
- Object DescriptionObject DescriptionThe type of astronomical object.Spiral galaxy
- Release DateFebruary 5, 2013
- Science ReleaseAmateur and Professional Astronomers Team Up to Create a Cosmological Masterpiece
- Credit

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)

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M106, Spiral Galaxy in Canes Venatici
This multiframe, mosaic, wide-field image of M106 was created as an experiment in using the Hubble Legacy Archive as a clearing house for Hubble Space Telescope data of the galaxy. WFC3, ACS, and WFPC2 Hubble data of the nucleus and inner spiral arms were combined with...
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Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov