RECON observing guide for 15502_99NV27_20250609080047

Occultation event with (15502) 99NV27, event index number 1043
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/09 08:00:47 UTC

J2000 position of star is 01:20:36.5 +23:53:18
Equinox of date position of star is 01:21:59.9 +24:01:16
Star is 150 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 48% with SNR of 1.5 for the occulted depth (per occulted point)

Apparent velocity is 32.3 km/sec on the sky relative to the star, or, 28.1 arcsec/hr.
The recommended exposure time corresponds to 17.8 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 34.2 km.
The sky-plane scale is 4134.5 km/arcsec.

Diameter estimates:
57.5 km assuming a 5% albedo, aximum of 1.8 sec for a central chord
23.5 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 57.5 km used for deployment plan.

Star training set for 15502_99NV27, (2025/06/09 08:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.0 +16:33:30  0.8 46.20 163
6Bet Ari       01:56:03.0 +20:55:53  2.6  8.45 157
PPM 090772     01:26:59.4 +23:38:35  6.5  1.20 151
PPM 090734     01:24:39.1 +24:39:07  8.2  0.87 151
PPM 090699     01:22:34.3 +24:00:12  9.6  0.13 150
15502_99NV27   01:21:59.9 +24:01:16 15.9       150
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 15502_99NV27, (2025/06/09 08:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 46.20 163
6Bet Ari       01:54:38.6 +20:48:26  2.6  8.45 157
PPM 090772     01:25:35.7 +23:30:41  6.5  1.20 151
PPM 090734     01:23:15.3 +24:31:11  8.2  0.87 151
PPM 090699     01:21:10.8 +23:52:15  9.6  0.13 150
15502_99NV27   01:20:36.5 +23:53:18 15.9       150
Positions are for J2000


Created by recondetail.pro, 2025/02/28 09:04:25 MT