RECON: TNO occultation with 202421

Event between (202421) 05UQ513 and star GA1260:00274839 with event index number of 2177450

Geocentric closest approach at 2026/12/24 02:02:21 UTC

J2000 position of star is 01:20:06.7 +36:35:12
Equinox of date position of star is 01:21:28.8 +36:42:44
Stellar brightness G=14.7, 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 100% illuminated.
Apparent brightness V=20.8

[RECON map]
Object is 47.3 AU from the Sun and 46.8 AU from the Earth.
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 1956 km.
The sky-plane scale is 33964.7 km/arcsec.

The object has an absolute magnitude Hv=3.9
Diameter=972.8 km assuming a 5% albedo -- 61.8 sec chord
Diameter=397.1 km assuming a 30% albedo -- 25.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 202421, (2026/12/24 02:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.3 +16:33:42  0.8 47.55  25
57Gam1And      02:05:34.1 +42:27:28  2.3 10.21  52
47 And         01:25:13.8 +37:51:18  5.5  1.33  60
PPM 066225     01:24:50.7 +36:39:17  6.7  0.64  60
PPM 066181     01:22:03.7 +36:30:24 10.7  0.24  61
202421         01:21:38.9 +36:43:39 14.7        61
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 9.9 km RECON observability=0.8 and success probability=2.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Victoria	02:01:36	-15.5	AT	Up	70.9	121.1	Up	01:51:47 - 02:11:24	4200
Kamloops	02:01:18	-18.0	AT	Up	71.2	131.7	Up	01:51:30 - 02:11:07	4021
Sisters	02:02:03	-15.5	AT	Up	74.0	112.5	Up	01:52:15 - 02:11:52	4003
The Dalles	02:01:54	-16.1	AT	Up	73.7	117.2	Up	01:52:05 - 02:11:42	3996
Chiloquin	02:02:15	-14.8	AT	Up	74.4	106.3	Up	01:52:27 - 02:12:04	3994
Oregon Observatory	02:02:06	-15.5	AT	Up	74.3	111.4	Up	01:52:17 - 02:11:54	3986
Klamath Falls	02:02:17	-14.8	AT	Up	74.6	105.3	Up	01:52:29 - 02:12:06	3981
Maupin	02:01:56	-16.1	AT	Up	74.0	116.1	Up	01:52:07 - 02:11:44	3981
Bend	02:02:05	-15.6	AT	Up	74.3	112.1	Up	01:52:16 - 02:11:53	3979
Ellensburg	02:01:43	-16.9	AT	Up	73.4	122.4	Up	01:51:54 - 02:11:31	3974
Yakima	02:01:47	-16.8	AT	Up	73.6	121.2	Up	01:51:59 - 02:11:36	3968
Peachland	02:01:24	-18.1	Dark	Up	72.1	130.9	Up	01:51:36 - 02:11:13	3965
Wenatchee	02:01:41	-17.2	AT	Up	73.3	124.0	Up	01:51:52 - 02:11:29	3965
Manson/Chelan	02:01:38	-17.4	AT	Up	73.1	125.6	Up	01:51:49 - 02:11:26	3961
Summerland	02:01:25	-18.1	Dark	Up	72.2	130.8	Up	01:51:37 - 02:11:14	3956
Toppenish/White Swan	02:01:48	-16.9	AT	Up	73.8	120.9	Up	01:51:59 - 02:11:36	3951
Penticton	02:01:25	-18.2	Dark	Up	72.3	130.9	Up	01:51:37 - 02:11:14	3947
Kelowna	02:01:24	-18.3	Dark	Up	72.2	131.8	Up	01:51:36 - 02:11:13	3947
Oliver	02:01:28	-18.1	Dark	Up	72.6	130.0	Up	01:51:40 - 02:11:17	3942
Brewster	02:01:36	-17.7	AT	Up	73.1	126.9	Up	01:51:48 - 02:11:25	3938
Okanogan	02:01:33	-17.9	AT	Up	73.1	128.0	Up	01:51:45 - 02:11:22	3929
Fall River/Burney	02:02:26	-14.7	AT	Up	75.2	101.6	Up	01:52:37 - 02:12:14	3928
Anarchist Mountain Observatory	02:01:29	-18.2	Dark	Up	72.8	130.0	Up	01:51:41 - 02:11:18	3925
Greenville	02:02:31	-14.7	AT	Up	75.7	98.7	Up	01:52:42 - 02:12:19	3874
Quincy	02:02:32	-14.7	AT	Up	75.7	97.9	Up	01:52:44 - 02:12:21	3870
Gimple	02:02:31	-14.8	AT	Up	75.7	98.8	Up	01:52:42 - 02:12:19	3867
Cedarville	02:02:21	-15.7	AT	Up	75.9	105.0	Up	01:52:32 - 02:12:09	3841
PNWRO	02:01:48	-17.8	AT	Up	74.9	122.9	Up	01:51:59 - 02:11:36	3834
Portola	02:02:33	-15.0	AT	Up	76.1	97.9	Up	01:52:45 - 02:12:22	3828
Reno	02:02:34	-15.4	AT	Up	76.6	97.5	Up	01:52:45 - 02:12:22	3769
Carson City	02:02:37	-15.3	AT	Up	76.7	96.1	Up	01:52:48 - 02:12:25	3759
Gardnerville	02:02:38	-15.3	AT	Up	76.8	95.1	Up	01:52:50 - 02:12:27	3750
Yerington	02:02:37	-15.7	AT	Up	77.2	95.9	Up	01:52:48 - 02:12:25	3702
Lee Vining	02:02:44	-15.4	AT	Up	77.3	91.4	Up	01:52:55 - 02:12:32	3675
Hawthorne	02:02:39	-16.0	AT	Up	77.7	94.3	Up	01:52:51 - 02:12:28	3647
Bishop	02:02:47	-15.8	AT	Up	77.9	89.1	Up	01:52:58 - 02:12:35	3599
Wildwood	02:03:09	-14.7	AT	Up	77.4	74.3	Up	01:53:21 - 02:12:58	3533
Beatty	02:02:48	-16.9	AT	Up	79.2	87.6	Up	01:53:00 - 02:12:37	3448
Idyllwild	02:03:10	-16.1	AT	Up	78.7	71.5	Up	01:53:21 - 02:12:58	3357
Calipatria	02:03:12	-16.9	AT	Up	79.5	67.4	Up	01:53:24 - 02:13:01	3233
Laughlin/Bullhead City	02:02:57	-18.2	Dark	Up	80.8	77.9	Up	01:53:09 - 02:12:46	3211
Lake Havasu City	02:03:01	-18.2	Dark	Up	80.8	73.7	Up	01:53:13 - 02:12:50	3169
Patrick	02:02:54	-18.8	Dark	Up	81.4	79.1	Up	01:53:06 - 02:12:43	3157
Yuma	02:03:13	-17.5	AT	Up	80.0	64.0	Up	01:53:25 - 02:13:02	3140
Sleaford	02:00:53	-27.0	Dark	Up	74.3	170.7	Up	01:51:04 - 02:10:41	3102
George/Scottsdale	02:03:02	-19.9	Dark	Up	82.5	65.1	Up	01:53:13 - 02:12:50	2927
Dunrhomin	02:02:08	-26.4	Dark	Up	86.0	155.8	Up	01:52:19 - 02:11:56	2603
CU-SBO	02:02:10	-26.3	Dark	Up	86.2	153.3	Up	01:52:21 - 02:11:58	2601
Nikitin	02:02:09	-26.3	Dark	Up	86.2	154.5	Up	01:52:20 - 02:11:57	2598

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 202421, (2026/12/24 02:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 47.55  25
57Gam1And      02:03:54.0 +42:19:46  2.3 10.21  52
47 And         01:23:40.8 +37:42:54  5.5  1.33  60
PPM 066225     01:23:18.1 +36:30:53  6.7  0.64  60
PPM 066181     01:20:31.5 +36:21:57 10.7  0.24  61
202421         01:20:06.7 +36:35:12 14.7        61
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:32:42 UT

RECON