RECON: TNO occultation with 11QF99

Event between 11QF99 and star GA1020:02262852 with event index number of 2124558

Geocentric closest approach at 2026/12/01 11:32:59 UTC

J2000 position of star is 06:47:10.8 +13:21:26
Equinox of date position of star is 06:48:30.9 +13:19:48
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 61 degrees from the moon. Moon is 48% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 16.6 AU from the Sun and 15.8 AU from the Earth.
Apparent velocity is 18.2 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 171 seconds.
The 1-sigma cross-track error in the shadow position is 793 km.
The sky-plane scale is 11440.7 km/arcsec.

The object has an absolute magnitude Hv=9.7
Diameter=66.4 km assuming a 5% albedo -- 3.7 sec chord
Diameter=27.1 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 11QF99, (2026/12/01 11:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.8 +07:24:35  0.4 14.10  74
Alhena         06:39:16.0 +16:22:26  1.9  3.81  63
31Xi Gem       06:46:48.0 +12:51:52  3.4  0.65  61
PPM 122982     06:46:45.7 +13:18:22  7.4  0.47  61
PPM 123021     06:48:19.6 +13:15:40  9.2  0.11  61
11QF99         06:48:41.9 +13:19:34 14.6        60
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 5.0 sigma about the mid-time.
The median site spacing is 36.2 km RECON observability=1.0 and success probability=76.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	11:30:32	-29.6	Dark	Up	42.1	229.2	Up	11:15:45 - 11:45:19	1164
Kamloops	11:31:19	-38.6	Dark	Up	49.0	212.1	Up	11:16:32 - 11:46:06	1024
Kelowna	11:31:14	-38.2	Dark	Up	49.3	213.8	Up	11:16:27 - 11:46:01	950
Peachland	11:31:15	-38.4	Dark	Up	49.5	213.5	Up	11:16:28 - 11:46:02	940
Summerland	11:31:15	-38.4	Dark	Up	49.6	213.7	Up	11:16:28 - 11:46:02	927
Penticton	11:31:14	-38.3	Dark	Up	49.6	213.9	Up	11:16:27 - 11:46:01	920
Oliver	11:31:14	-38.4	Dark	Up	49.9	214.1	Up	11:16:27 - 11:46:01	888
Anarchist Mountain Observatory	11:31:13	-38.3	Dark	Up	50.0	214.5	Up	11:16:26 - 11:46:00	873
Victoria	11:31:28	-41.0	Dark	Up	51.8	209.1	Up	11:16:41 - 11:46:15	834
Okanogan	11:31:13	-38.5	Dark	Up	50.6	214.7	Up	11:16:26 - 11:46:00	813
Brewster	11:31:13	-38.7	Dark	Up	50.9	214.6	Up	11:16:26 - 11:46:00	788
Manson/Chelan	11:31:15	-39.0	Dark	Up	51.2	214.2	Up	11:16:28 - 11:46:02	769
Wenatchee	11:31:15	-39.2	Dark	Up	51.7	214.3	Up	11:16:28 - 11:46:02	725
Ellensburg	11:31:15	-39.4	Dark	Up	52.1	214.3	Up	11:16:28 - 11:46:02	687
Yakima	11:31:15	-39.5	Dark	Up	52.5	214.5	Up	11:16:28 - 11:46:02	649
Toppenish/White Swan	11:31:14	-39.4	Dark	Up	52.6	214.9	Up	11:16:27 - 11:46:01	628
PNWRO	11:31:08	-38.5	Dark	Up	52.3	217.4	Up	11:16:21 - 11:45:55	591
The Dalles	11:31:17	-40.1	Dark	Up	53.5	214.4	Up	11:16:30 - 11:46:04	555
Maupin	11:31:16	-40.1	Dark	Up	53.8	214.8	Up	11:16:29 - 11:46:03	515
Sisters	11:31:17	-40.6	Dark	Up	54.7	214.8	Up	11:16:30 - 11:46:04	432
Bend	11:31:15	-40.4	Dark	Up	54.8	215.4	Up	11:16:28 - 11:46:02	409
Oregon Observatory	11:31:16	-40.5	Dark	Up	55.0	215.3	Up	11:16:29 - 11:46:03	392
Chiloquin	11:31:17	-41.0	Dark	Up	56.3	215.8	Up	11:16:30 - 11:46:04	264
Klamath Falls	11:31:16	-41.0	Dark	Up	56.5	216.2	Up	11:16:29 - 11:46:03	231
Cedarville	11:31:09	-39.9	Dark	Up	56.3	219.3	Up	11:16:22 - 11:45:56	159
Fall River/Burney	11:31:13	-40.9	Dark	Up	57.3	217.9	Up	11:16:26 - 11:46:00	113
Dunrhomin	11:30:06	-28.8	Dark	Up	48.7	239.7	Up	11:15:19 - 11:44:53	52
Nikitin	11:30:06	-28.8	Dark	Up	48.8	239.9	Up	11:15:19 - 11:44:53	33
CU-SBO	11:30:06	-28.8	Dark	Up	48.8	239.9	Up	11:15:19 - 11:44:53	27
Greenville	11:31:11	-40.6	Dark	Up	57.8	219.5	Up	11:16:24 - 11:45:58	22
Gimple	11:31:10	-40.6	Dark	Up	57.8	219.6	Up	11:16:23 - 11:45:57	22
Quincy	11:31:11	-40.6	Dark	Up	57.9	219.7	Up	11:16:24 - 11:45:58	2
Portola	11:31:08	-40.3	Dark	Up	57.8	220.6	Up	11:16:21 - 11:45:55	-12
Reno	11:31:05	-39.8	Dark	Up	57.7	221.8	Up	11:16:18 - 11:45:52	-39
Carson City	11:31:05	-39.8	Dark	Up	57.9	222.3	Up	11:16:18 - 11:45:52	-75
Yerington	11:31:02	-39.3	Dark	Up	57.8	223.4	Up	11:16:15 - 11:45:49	-96
Gardnerville	11:31:05	-39.8	Dark	Up	58.1	222.6	Up	11:16:18 - 11:45:52	-100
Hawthorne	11:30:59	-39.0	Dark	Up	57.8	224.7	Up	11:16:12 - 11:45:46	-143
Lee Vining	11:31:01	-39.3	Dark	Up	58.5	224.6	Up	11:16:14 - 11:45:48	-200
Bishop	11:30:57	-38.8	Dark	Up	58.5	226.4	Up	11:16:10 - 11:45:44	-262
Beatty	11:30:50	-37.5	Dark	Up	57.9	229.3	Up	11:16:03 - 11:45:37	-311
Patrick	11:30:35	-35.2	Dark	Up	57.0	235.0	Up	11:15:48 - 11:45:22	-463
Laughlin/Bullhead City	11:30:38	-35.7	Dark	Up	57.6	234.4	Up	11:15:51 - 11:45:25	-489
Lake Havasu City	11:30:37	-35.5	Dark	Up	57.8	235.6	Up	11:15:50 - 11:45:24	-559
Wildwood	11:30:56	-38.9	Dark	Up	60.8	230.3	Up	11:16:09 - 11:45:43	-601
George/Scottsdale	11:30:25	-33.4	Dark	Up	56.5	239.6	Up	11:15:38 - 11:45:12	-638
Idyllwild	11:30:47	-37.4	Dark	Up	59.8	233.4	Up	11:16:00 - 11:45:34	-639
Calipatria	11:30:41	-36.4	Dark	Up	59.4	235.9	Up	11:15:54 - 11:45:28	-703
Yuma	11:30:37	-35.6	Dark	Up	59.0	237.7	Up	11:15:50 - 11:45:24	-749

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 11QF99, (2026/12/01 11:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.10  74
Alhena         06:37:42.8 +16:23:56  1.9  3.81  63
31Xi Gem       06:45:17.2 +12:53:39  3.4  0.65  61
PPM 122982     06:45:14.6 +13:20:09  7.4  0.47  61
PPM 123021     06:46:48.5 +13:17:31  9.2  0.11  61
11QF99         06:47:10.8 +13:21:26 14.6        61
Positions are for J2000

Event circumstances last updated at 2023/09/04 00:43:39 UT

RECON