RECON observing guide for 1867_Deiphobus_20250721092115

Occultation event with (1867) Deiphobus, event index number 1152
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/07/21 09:21:15 UTC

J2000 position of star is 03:06:33.9 +40:20:34
Equinox of date position of star is 03:08:13.7 +40:26:24
Star is 24 degrees from the moon. Moon is 15% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=14.1
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 8.1 per integration for unocculted signal
Expected flux drop is 27% with SNR of 2.2 for the occulted depth (per occulted point)

Apparent velocity is 25.9 km/sec on the sky relative to the star, or, 23.1 arcsec/hr.
The recommended exposure time corresponds to 31.1 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 15.7 km.
The sky-plane scale is 4047.0 km/arcsec.

Diameter estimates:
129.4 km assuming a 5% albedo, aximum of 5.0 sec for a central chord
52.8 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 129.4 km used for deployment plan.

Star training set for 1867_Deiphobus, (2025/07/21 09:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.4 +16:33:31  0.8 30.70  11
Algol          03:09:50.5 +41:03:08  2.1  0.68  24
28Ome Per      03:12:56.9 +39:42:24  5.8  1.16  23
PPM 045859     03:09:18.0 +40:10:57  8.4  0.33  24
PPM 045857     03:08:59.3 +40:17:56  9.5  0.20  24
PPM 045836     03:07:35.5 +40:20:17 10.3  0.16  24
1867_Deiphobus 03:08:13.7 +40:26:24 14.1        24
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 1867_Deiphobus, (2025/07/21 09:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 30.70  11
Algol          03:08:10.1 +40:57:20  2.1  0.68  24
28Ome Per      03:11:17.3 +39:36:41  5.8  1.16  23
PPM 045859     03:07:38.3 +40:05:08  8.4  0.33  24
PPM 045857     03:07:19.6 +40:12:07  9.5  0.20  24
PPM 045836     03:05:55.9 +40:14:26 10.3  0.16  24
1867_Deiphobus 03:06:33.9 +40:20:34 14.1        24
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:35:36 MT