Contact UsUse the information below to decide which route to use to contact the Minor Planet Center via e-mail. If messages are written in languages other than English, there may be (significant) delays in responding.
General EnquiriesFurther down this page there are links for reporting specific links to the Minor Planet Center. If your enquiry does not fall into one of those specific categories, please send your message to firstname.lastname@example.org.
Contacting Individual Staff Members
If you want to send a regular e-mail to an individual MPC staff member, send the message to <first initial><surname>@cfa.harvard.edu.
Reporting Astrometric Observations
Astrometric observations of minor planets, comets and natural satellites should not normally be reported via this form, but should be sent directly to email@example.com, formatted exactly as described in the Guide to Minor Body Astrometry.
If you have been told by MPC staff that your e-mail submissions are malformed (usually due to them being sent as HTML messages or as encoded attachments), paste your observations (including the required observational header) into this form. You will receive an ACK in the normal fashion. You may edit the subject line of the submitted message to a more appropriate one for your observations, if you so wish. Each message is limited to 32768 characters.
Querying Missing Astrometric Observations
If you think that we have not received your observation submission, or if you think that we have not processed one of your batches, use this form.
Be sure to include the date and time you submitted the observations and mention whether or not you received an acknowledgement.
Reporting Corrections to Observatory Code Locations/Names
If the coordinates that we have on file for your site are incorrect or we have the site or observatory name incorrect, please use this form.
Do not use this form to report updated coordinates if you move your observatory! See the Guide to Minor Body Astrometry for further information.
Reporting Non-Functional Links
If a link on this site is dead or mis-directed, use this form.
Be sure to include the URL on which the dead link resides and which link is at fault.
Reporting Problems with the HTML on the web Site
If your experience issues with the HTML code used on any page on the MPC site use this form.
Be sure to include the URL of the problem page. You should also indicate the browser and version you are using.
Reporting Problems with the cgi Scripts on the web Site
If your experience issues with the cgi scripts used on any page on the MPC site use this form.
Be sure to include the URL of the problem page. You should also indicate the browser and version you are using, and what values you entered into the cgi's form.
Request New Pages/Services
If you wish to request a new webpage or web service use this form.
If you need to contact us by postal mail, our address is: Mail Stop 18, 60 Garden Street, Cambridge, MA 02138, U.S.A.