RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03538501 with event index number of 1840343

Geocentric closest approach at 2028/02/12 04:09:34 UTC

J2000 position of star is 06:30:25.2 +41:21:00
Equinox of date position of star is 06:32:07.7 +41:19:54
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 71 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=23.6

[RECON map]
Object is 26.8 AU from the Sun and 26.2 AU from the Earth.
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is 1243 km.
The sky-plane scale is 18987.6 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=91.2 km assuming a 5% albedo -- 4.7 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2028/02/12 04:10UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:02.3 +27:57:21  1.1 20.28  53
34Bet Aur      06:01:35.6 +44:56:49  1.9  6.68  77
50Psi2Aur      06:41:20.1 +42:27:40  5.9  2.01  70
PPM 049095     06:32:24.5 +41:22:49  7.0  0.05  71
8405           06:32:24.4 +41:19:43 16.0        71
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 4.7 sigma about the mid-time.
The median site spacing is 32.9 km RECON observability=1.0 and success probability=6.1%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	04:10:05	-28.7	Dark	Up	76.7	129.3	Up	03:55:05 - 04:25:05	-1749
Victoria	04:10:22	-27.2	Dark	Up	76.2	115.2	Up	03:55:22 - 04:25:22	-1854
Kelowna	04:10:05	-29.4	Dark	Up	77.7	128.8	Up	03:55:05 - 04:25:05	-1856
Peachland	04:10:06	-29.3	Dark	Up	77.6	127.6	Up	03:55:06 - 04:25:06	-1857
Summerland	04:10:06	-29.4	Dark	Up	77.7	127.4	Up	03:55:06 - 04:25:06	-1875
Penticton	04:10:06	-29.5	Dark	Up	77.8	127.4	Up	03:55:06 - 04:25:06	-1885
Oliver	04:10:07	-29.5	Dark	Up	78.0	126.1	Up	03:55:07 - 04:25:07	-1919
Anarchist Mountain Observatory	04:10:07	-29.7	Dark	Up	78.3	125.9	Up	03:55:07 - 04:25:07	-1942
Sleaford	04:09:13	-36.5	Dark	Up	79.3	182.1	Up	03:54:13 - 04:24:13	-1986
Okanogan	04:10:09	-29.7	Dark	Up	78.5	122.8	Up	03:55:09 - 04:25:09	-1998
Brewster	04:10:11	-29.7	Dark	Up	78.5	121.2	Up	03:55:11 - 04:25:11	-2018
Manson/Chelan	04:10:13	-29.5	Dark	Up	78.4	119.4	Up	03:55:13 - 04:25:13	-2026
Wenatchee	04:10:15	-29.5	Dark	Up	78.6	117.0	Up	03:55:15 - 04:25:15	-2067
Ellensburg	04:10:16	-29.4	Dark	Up	78.6	114.7	Up	03:55:16 - 04:25:16	-2100
Yakima	04:10:17	-29.5	Dark	Up	78.8	112.8	Up	03:55:17 - 04:25:17	-2139
Toppenish/White Swan	04:10:18	-29.6	Dark	Up	79.0	112.1	Up	03:55:18 - 04:25:18	-2166
The Dalles	04:10:22	-29.2	Dark	Up	78.7	106.9	Up	03:55:22 - 04:25:22	-2215
PNWRO	04:10:13	-30.7	Dark	Up	80.0	113.5	Up	03:55:13 - 04:25:13	-2254
Maupin	04:10:23	-29.4	Dark	Up	78.9	105.1	Up	03:55:23 - 04:25:23	-2260
Sisters	04:10:27	-29.2	Dark	Up	78.8	100.0	Up	03:55:27 - 04:25:27	-2328
Bend	04:10:28	-29.4	Dark	Up	79.0	99.2	Up	03:55:28 - 04:25:28	-2361
Oregon Observatory	04:10:29	-29.4	Dark	Up	78.9	98.1	Up	03:55:29 - 04:25:29	-2373
Chiloquin	04:10:33	-29.3	Dark	Up	78.7	91.1	Up	03:55:33 - 04:25:33	-2487
Klamath Falls	04:10:34	-29.4	Dark	Up	78.8	89.4	Up	03:55:34 - 04:25:34	-2524
Cedarville	04:10:30	-30.7	Dark	Up	80.0	86.6	Up	03:55:30 - 04:25:30	-2652
Fall River/Burney	04:10:35	-29.8	Dark	Up	79.0	83.6	Up	03:55:35 - 04:25:35	-2654
Greenville	04:10:37	-30.3	Dark	Up	79.2	79.0	Up	03:55:37 - 04:25:37	-2761
Gimple	04:10:36	-30.4	Dark	Up	79.3	78.9	Up	03:55:36 - 04:25:36	-2764
Quincy	04:10:37	-30.3	Dark	Up	79.2	77.9	Up	03:55:37 - 04:25:37	-2781
Portola	04:10:35	-30.7	Dark	Up	79.5	77.2	Up	03:55:35 - 04:25:35	-2812
Reno	04:10:33	-31.2	Dark	Up	79.9	75.5	Up	03:55:33 - 04:25:33	-2863
Carson City	04:10:34	-31.3	Dark	Up	79.9	73.5	Up	03:55:34 - 04:25:34	-2900
Gardnerville	04:10:34	-31.4	Dark	Up	79.8	72.2	Up	03:55:34 - 04:25:34	-2926
Yerington	04:10:32	-31.8	Dark	Up	80.3	72.1	Up	03:55:32 - 04:25:32	-2943
Hawthorne	04:10:31	-32.3	Dark	Up	80.5	69.0	Up	03:55:31 - 04:25:31	-3010
Lee Vining	04:10:35	-32.0	Dark	Up	79.9	66.5	Up	03:55:35 - 04:25:35	-3048
Bishop	04:10:34	-32.6	Dark	Up	80.2	62.4	Up	03:55:34 - 04:25:34	-3135
Beatty	04:10:27	-34.0	Dark	Up	81.1	57.1	Up	03:55:27 - 04:25:27	-3243
Dunrhomin	04:09:31	-41.8	Dark	Up	88.5	317.2	Up	03:54:31 - 04:24:31	-3253
Nikitin	04:09:31	-41.8	Dark	Up	88.4	322.0	Up	03:54:31 - 04:24:31	-3271
CU-SBO	04:09:32	-41.8	Dark	Up	88.3	324.9	Up	03:54:32 - 04:24:32	-3276
Wildwood	04:10:42	-32.9	Dark	Up	78.2	48.6	Up	03:55:42 - 04:25:42	-3455
Laughlin/Bullhead City	04:10:22	-36.0	Dark	Up	81.3	42.5	Up	03:55:22 - 04:25:22	-3497
Patrick	04:10:18	-36.5	Dark	Up	81.8	41.1	Up	03:55:18 - 04:25:18	-3498
Idyllwild	04:10:35	-34.4	Dark	Up	79.1	43.0	Up	03:55:35 - 04:25:35	-3565
Lake Havasu City	04:10:22	-36.3	Dark	Up	80.9	38.8	Up	03:55:22 - 04:25:22	-3575
Calipatria	04:10:31	-35.5	Dark	Up	79.2	37.7	Up	03:55:31 - 04:25:31	-3670
George/Scottsdale	04:10:13	-38.4	Dark	Up	81.3	26.6	Up	03:55:13 - 04:25:13	-3740
Yuma	04:10:28	-36.3	Dark	Up	79.3	33.6	Up	03:55:28 - 04:25:28	-3747

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.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 8405, (2028/02/12 04:10UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 20.28  53
34Bet Aur      05:59:31.6 +44:56:51  1.9  6.68  77
50Psi2Aur      06:39:19.8 +42:29:19  5.9  2.01  70
PPM 049095     06:30:25.2 +41:24:06  7.0  0.05  71
8405           06:30:25.2 +41:21:00 16.0        71
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:37:15 UT

RECON