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<LINK content-role="query" href="/NED::API/ClassificationsOfObject?TARGET=MESSIER 31&amp;MAXREC=10"/>
<TABLE ID="classifications" name="ClassificationsfObject" nrows="10">
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The result is truncated. The full result is available at the Resource Link.
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<DESCRIPTION>
Copyright 2019-2026 Caltech, Support from NASA is acknowledged.
This information is taken from a collection created and curated by
the NASA/IPAC Extragalactic Database (NED), operated by the California Institute of Technology (Caltech).
If your research benefits from the use of NED, the following acknowledgement in your paper would be appreciated:

"This research has made use of the NASA/IPAC Extragalactic Database (NED), which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology."

See: https://ned.ipac.caltech.edu/Documents/Overview/Acknowledgments 
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<FIELD ID="row" name="No." ucd="meta.number" datatype="int" >
<DESCRIPTION>A row number applicable to this list only</DESCRIPTION>
</FIELD>
<FIELD ID="class_domain" name="Domain of Classification" ucd="meta.code.class;src.class" datatype="char" arraysize="*" >
<DESCRIPTION>Domain of Classification: Galaxy Morphology, Radio Morphology, Distance Indicator, Kinematics, Activity Type, Luminosity Class, and Hierarchy</DESCRIPTION>
</FIELD>
<FIELD ID="class_pub" name="Published Classification" ucd="meta.code.class;src.class" datatype="char" arraysize="*" >
<DESCRIPTION>Published Classification</DESCRIPTION>
</FIELD>
<FIELD ID="refcode" name="Reference" ucd="meta.bib.bibcode" datatype="char" arraysize="*" >
<DESCRIPTION>Bibliographic reference code</DESCRIPTION>
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<FIELD ID="class_ned" name="NED Homogenized Classification" ucd="meta.code.class;src.class" datatype="char" arraysize="*" >
<DESCRIPTION>NED Homogenized Classification</DESCRIPTION>
</FIELD>
<FIELD ID="class_flag" name="NED Homogenized Classification Flag" ucd="meta.code.class;src.class" datatype="char" arraysize="*" >
<DESCRIPTION>NED Homogenized Classification Flag</DESCRIPTION>
</FIELD>
<FIELD ID="class_band" name="Bandpass" ucd="instr.bandpass;src.class" datatype="char" arraysize="*" >
<DESCRIPTION>Bandpass of Classification</DESCRIPTION>
</FIELD>
<FIELD ID="class_region" name="Region of Classification" ucd="src.class;obs.field" datatype="char" arraysize="*" >
<DESCRIPTION>The spatial region to which the classification applies</DESCRIPTION>
</FIELD>
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<DESCRIPTION>Notes and qualifiers</DESCRIPTION>
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<DATA>
<TABLEDATA>
<TR>
<TD>1</TD>
<TD>Hierarchy</TD>
<TD>T</TD>
<TD>1988AISAO..26...42K</TD>
<TD>in a triple                             </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see KTG 01</TD>
</TR>
<TR>
<TD>2</TD>
<TD>Hierarchy</TD>
<TD>T</TD>
<TD>1937AnLun...6....1H</TD>
<TD>in a triple                             </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see HOLM 017</TD>
</TR>
<TR>
<TD>3</TD>
<TD>Hierarchy</TD>
<TD>GR</TD>
<TD>1993A&amp;AS..100...47G</TD>
<TD>Group member, radial-velocity confirmed </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see GG 011</TD>
</TR>
<TR>
<TD>4</TD>
<TD>Hierarchy</TD>
<TD>GM</TD>
<TD>1982ApJ...257..423H</TD>
<TD>Group member                            </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see [HG82] 63</TD>
</TR>
<TR>
<TD>5</TD>
<TD>Hierarchy</TD>
<TD>GM</TD>
<TD>1984TarOT..73....1V</TD>
<TD>Group member                            </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see VNK.001B</TD>
</TR>
<TR>
<TD>6</TD>
<TD>Hierarchy</TD>
<TD>GM</TD>
<TD>1979AN....300..181K</TD>
<TD>Group member                            </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see Local GROUP</TD>
</TR>
<TR>
<TD>7</TD>
<TD>Hierarchy</TD>
<TD>G1</TD>
<TD>2005AJ....129..178K</TD>
<TD>Brightest group member                  </TD>
<TD/>
<TD>Optical</TD>
<TD>Environment</TD>
<TD>see Andromeda Group</TD>
</TR>
<TR>
<TD>8</TD>
<TD>Kinematics</TD>
<TD>HI line width</TD>
<TD>1980A&amp;AS...40..215C</TD>
<TD>HI line width                           </TD>
<TD/>
<TD>Radio</TD>
<TD>Galaxy</TD>
<TD>From HyperLEDA (Sept. 2010):  \n  log(w) = 2.732;    [w = 539 km/s] \n 2: HI line width measured at 25% of maximum</TD>
</TR>
<TR>
<TD>9</TD>
<TD>Kinematics</TD>
<TD>HI line width</TD>
<TD>1979A&amp;A....75...19B</TD>
<TD>HI line width                           </TD>
<TD/>
<TD>Radio</TD>
<TD>Galaxy</TD>
<TD>From HyperLEDA (Sept. 2010):  \n  log(w) = 2.658;    [w = 454 km/s] \n 0: undefined level for HI line width</TD>
</TR>
<TR>
<TD>10</TD>
<TD>Kinematics</TD>
<TD>HI line width</TD>
<TD>1975MNRAS.170..503D</TD>
<TD>HI line width                           </TD>
<TD/>
<TD>Radio</TD>
<TD>Galaxy</TD>
<TD>From HyperLEDA (Sept. 2010):  \n  log(w) = 2.710;    [w = 512 km/s] \n 5: HI line width measured at 50% of maximum</TD>
</TR>
</TABLEDATA>
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