RECON observing guide for 4827_Dares_20250716073404

Occultation event with (4827) Dares, event index number 1146
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/07/16 07:34:04 UTC

J2000 position of star is 03:02:27.1 +20:15:37
Equinox of date position of star is 03:03:54.7 +20:21:34
Star is 47 degrees from the moon. Moon is 69% illuminated.
Stellar brightness G=12.5, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 15.5 per integration for unocculted signal
Expected flux drop is 97% with SNR of 15.0 for the occulted depth (per occulted point)

Apparent velocity is 25.8 km/sec on the sky relative to the star, or, 24.4 arcsec/hr.
The recommended exposure time corresponds to 3.1 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 11.6 km.
The sky-plane scale is 3811.1 km/arcsec.

Diameter estimates:
46.3 km assuming a 5% albedo, aximum of 1.8 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 46.3 km used for deployment plan.

Star training set for 4827_Dares, (2025/07/16 07:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.3 +16:33:31  0.8 22.47  68
Hamal          02:08:37.1 +23:34:55  2.0 13.21  37
48Eps Ari      03:00:40.6 +21:26:27  5.6  1.32  47
PPM 118722     03:00:37.8 +20:05:25  7.7  0.82  46
PPM 092176     03:04:37.2 +20:26:06  9.2  0.18  47
4827_Dares     03:03:54.7 +20:21:34 16.1        48
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 4827_Dares, (2025/07/16 07:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 22.47  68
Hamal          02:07:10.8 +23:27:41  2.0 13.21  37
48Eps Ari      02:59:12.6 +21:20:25  5.6  1.32  47
PPM 118722     02:59:10.5 +19:59:23  7.7  0.82  46
PPM 092176     03:03:09.6 +20:20:11  9.2  0.18  47
4827_Dares     03:02:27.1 +20:15:37 16.1        47
Positions are for J2000


Created by recondetail.pro, 2025/02/28 11:18:50 MT