RECON observing guide for 5283_Pyrrhus_20250629232106

Occultation event with (5283) Pyrrhus, event index number 1102
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/29 23:21:06 UTC

J2000 position of star is 10:55:55.4 +24:10:24
Equinox of date position of star is 10:57:18.0 +24:02:12
Star is 15 degrees from the moon. Moon is 23% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 5.6 per integration for unocculted signal
Expected flux drop is 57% with SNR of 3.2 for the occulted depth (per occulted point)

Apparent velocity is 29.5 km/sec on the sky relative to the star, or, 26.0 arcsec/hr.
The recommended exposure time corresponds to 16.2 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 42.3 km.
The sky-plane scale is 4079.0 km/arcsec.

Diameter estimates:
65.8 km assuming a 5% albedo, aximum of 2.2 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 65.8 km used for deployment plan.

Star training set for 5283_Pyrrhus, (2025/06/29 23:21UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.6 +11:50:30  1.3 16.62   6
68Del Leo      11:15:27.6 +20:23:01  2.6  5.57  14
48 LMi         10:56:05.0 +25:21:16  6.5  1.35  16
PPM 100777     10:58:37.5 +24:00:22  8.3  0.30  15
5283_Pyrrhus   10:57:18.0 +24:02:12 15.6        15
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Star training set for 5283_Pyrrhus, (2025/06/29 23:21UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 16.62   6
68Del Leo      11:14:06.7 +20:31:22  2.6  5.57  14
48 LMi         10:54:42.1 +25:29:27  6.5  1.35  16
PPM 100777     10:57:15.0 +24:08:35  8.3  0.30  15
5283_Pyrrhus   10:55:55.4 +24:10:24 15.6        15
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:12:52 MT