Official Comet Hunting Guide
Report a SOHO Object
Report a STEREO Object
Basics (via NASA)
LASCO C3 Transits
STEREO L4/L5 Campaign
STEREO JAVA Orbit Tool
C2/C3 Comet Tracks
NASA Citizen Science
SOHO Real-Time Images
Comet McNaught in 2007
15-years of SOHO Comets
Reporting SECCHI Objects
Where is the report form?You might have noticed that there are no SECCHI options on the SOHO sungrazer comet reports form. The primary reason for this is that SECCHI is not going to discover a lot of comets (or asteroids), at least while LASCO is still operational. The addition of reports of SECCHI comets -- the vast majority of which would turn out to be noise or known objects -- would make the reports page even more confusing than it currently is!
So how do I report something?There are two ways in which you can report a suspected object in SECCHI images, and we recommend you actually do both of these, in this order:
Reporting SECCHI cometsIf you would like to report a possible comet in SECCHI images, please send an email to me using the following format:
Subject: Potential SECCHI comet
Camera and spacecraft (e.g. HI1-A,COR2-B, etc)
Image date(s) (e.g. 2008-09-02, 20080902-20080903, etc)
Your "0,0" position (e.g. (0,0) upper-left)
Image times and x,y positions (e.g. 20:45 123,456)
I will reply to your email to confirm receipt, but it may take me some time before I can check your report.
What are the rules for reporting SECCHI comets?Nobody likes rules but we have to have them. So here they are:
OK, so where are the images?You can obtain the latest SECCHI images from the NRL SECCHI Images website. Note that on that site, we resize the COR2 images down to half-resolution 1024x1024 pixel images. The HI images are also at 1024x1024 size, which is the same size at which we downlink them from the spacecraft.
The images on the SECCHI website are scaled for maximum "prettiness", but not necessary maximum contrast. You may find that by applying your own processing to the raw data (FITS file format), you can see fainter objects. Feel free to download the raw FITS images from the STEREO Science Center and process the data yourself. If you make any particulary pretty images, we encourage you to share them with us -- we might use them on our website (and credit you, of course)!
For images taken as part of the L4/L5 campaign, there will be no "pretty picture" images on the NRL SECCHI Website. You will need to download the FITS images from the STEREO Science Center.
Other questions?Feel free to email the Sungrazer webmaster if you have any questions or comments about anything you have read here.