Facility
- MMT 6.5m telescope1
- MPC catalogue distributed by ARI/Zentrum für Astronomie Heidelberg.2
- MSSL1
- MSX6
- Many; you may obtain a list at http://lightmeter.astronomy2009.at1
- Mars Dust Maps developped at LMD1
- Mars Odyssey Orbiter2
- Max-Planck-Institut für Astronomie Heidelberg1
- NEBULA CATALOG8
- NICER1
- NOFS, Arizona1
- NUSTAR7
- Nobeyama 45-m Radio Telescope1
- NuSTAR1
- OAO-22
- ORFEUS1
- OSO84
- Observatorio del Roque de los Muchachos1
- Ondrejov Perek 2m Telescope2
- Orbita Radiopolygon1
