L26 Mare FrigorisMarkarian2017-01-31T10:52:45+00:0031 August 2009|L26-50|Arcuate mare of uncertain origin, 1600km 17-02-2008 Lunation 10.80 days, 88.3% illumination 180mm f15 Mak-Cass, Philips SPC900NC
L27 ArchimedesMarkarian2017-01-31T10:52:45+00:0031 August 2009|L26-50|Large crater lacking central peak, 83km 13-05-2008 Lunation 8.42 days, 68.3% illumination 180mm f15 Mak-Cass, Philips SPC900NC
L28 HipparchusMarkarian2017-01-31T10:52:45+00:007 June 2010|L26-50|First drawing of a single crater 02-04-2009 Lunation 7.13 days 53% illumination 180mm f15 Mak-Cass Philips SPC900NC
L29 Ariadaeus RilleMarkarian2017-01-31T10:52:46+00:007 June 2010|L26-50|Long, linear graben Lunation 20.46 days 88% illumination 180mm f15 Mak-Cass Philips SPC900NC
L35 Triesnecker RillesMarkarian2017-01-31T10:52:46+00:008 June 2010|L26-50|Rille family 02-04-2009 Lunation 7.13 days 53% illumination 180mm f15 Mak-Cass Philips SPC900NC
L42 Marius HillsMarkarian2017-01-31T10:52:46+00:0019 March 2011|L26-50|Complex of volcanic domes & hills 17-03-2011 22:00 GMT Lunation 13.05 days 95% illumination Seeing 5/10, Transparency 7/10 200mm Newtonian x2 Barlow f10 2000mm fl Philips SPC900NC
L44 MerseniusMarkarian2017-01-31T10:52:46+00:0020 March 2011|L26-50|Domed floor cut by secondary craters 17-03-2011 22:00 GMT Lunation 13.05 days 95% illumination Seeing 5/10, Transparency 7/10 200mm Newtonian x2 Barlow f10 2000mm fl Philips SPC900NC
L46 Regiomontanus central peakMarkarian2017-01-31T10:52:47+00:008 June 2010|L26-50|Possible volcanic peak 02-04-2009 Lunation 7.13 days 53% illumination 180mm f15 Mak-Cass Philips SPC900NC
L47 Alphonsus Dark SpotsMarkarian2017-01-31T10:52:47+00:0031 August 2009|L26-50|Dark-halo eruptions on crater floor, 119km 13-05-2008 Lunation 8.42 days, 68.3% illumination 180mm f15 Mak-Cass, Philips SPC900NC
L49 Gruithuisen Delta & GammaMarkarian2017-01-31T10:52:47+00:0019 March 2011|L26-50|Volcanic domes formed with viscous lavas 17-03-2011 22:00 GMT Lunation 13.05 days 95% illumination Seeing 5/10, Transparency 7/10 200mm Newtonian x2 Barlow f10 2000mm fl Philips SPC900NC