2015 April 19 – (737) Arequipa

Event Details

Object: (737) Arequipa
Event Date: 19 April 2015 UT
Observation Window: 04:55-04:59 UT

Sense-Up: x2
RA: 13:36:09 (equinox of date)
DEC: -02:33:31

RA: 13:35:19.7 (J2000)
DEC: -02:28:46.5
Star Magnitude: 9.7
Magnitude Drop: 2.8

Moon Phase: 0%
Moon Distance: 168 degrees

Additional information on this event is available here.


Given that the predicted shadow path lies far south of Pasco, this appulse event will not result in an actual occultation.  During the half hour before and after the appulse, we should be able to see the asteroid approach, merge with, and than move passed the target star.

Predicted shadow track for (737) Arequipa

Predicted shadow track for (737) Arequipa

Either before or after the event, you should make a short recording of your position information using the switch on the front of the IOTA-VTI box.  Adjust the switch to POSITION, record the screen showing your latitude/longitude for 3-5 seconds, and then adjust the switch back to TIME.

Thank you for keeping track of your observations using the RECON Observation Logsheet.

Star Training Set

Star training set for Arequipa, 2015/04/19 04:57 UT
Object            RA         Dec     mag  sep  mel
Spica          13:26:00.1 -11:14:27  1.0  9.04 169
79Zet Vir      13:35:28.4 -00:40:25  3.4  1.89 166
PPM 179075     13:33:44.6 -02:30:09  8.2  0.60 167
PPM 179084     13:36:00.7 -02:39:05  9.0  0.10 168
PPM 179085     13:36:07.1 -02:33:27 10.2  0.00 168
Arequipa       13:36:07.1 -02:33:27  9.7       168
Positions are for equinox of date

Finder Charts

The following chart was generated using the AAVSO Variable Star Plotter.  Note that we have changed the orientation of the map so that it will match what you will see using the MallinCAM connected to the telescope with a diagonal. For the remainder of the project, we intend to provide star charts using this orientation.

Star chart for 737 Arequipa

Star chart for 737 Arequipa

Images of Star Field

Below is an image of the star field taken by John Keller at sense-up of x128.

Starfield for (737) Arequipa taken by John Keller at x128

Starfield for (737) Arequipa taken by John Keller at x128

Here is the same star field rotated so that north is up.

Same field rotated so north is up

Same field rotated so north is up

Uploading data

To upload your video files and observation logsheet, go to http://spikard.boulder.swri.edu/upload.html.

Event Log

Following the event, please complete a RECON Event Report.