RECON: TNO occultation with 523620

Event between (523620) 07RH283 and star GA1220:01481618 with event index number of 2387263

Geocentric closest approach at 2025/01/17 07:49:15 UTC

J2000 position of star is 05:09:02.5 +32:55:48
Equinox of date position of star is 05:10:38.4 +32:57:35
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 88% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 21.3 AU from the Sun and 20.5 AU from the Earth.
Apparent velocity is 19.6 km/sec on the sky relative to the star, or, 4.7 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 1341 km.
The sky-plane scale is 14903.2 km/arcsec.

The object has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.9 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523620, (2025/01/17 07:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.6 +16:33:28  0.8 18.04  88
3Iot Aur       04:58:37.7 +33:12:12  2.7  2.54  81
14 Aur         05:17:02.4 +32:42:51  5.2  1.36  77
PPM 070028     05:13:47.8 +32:55:24  7.9  0.66  78
PPM 069982     05:11:25.1 +32:56:54  9.8  0.16  78
523620         05:10:40.7 +32:57:37 13.9        78
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 37.9 km RECON observability=1.0 and success probability=1.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	07:46:02	-58.0	Dark	Up	49.3	262.2	Up	07:36:12 - 07:55:52	5611
Kamloops	07:46:42	-59.6	Dark	Up	58.3	249.9	Up	07:36:52 - 07:56:32	5357
Kelowna	07:46:39	-60.5	Dark	Up	58.0	252.1	Up	07:36:49 - 07:56:29	5271
Peachland	07:46:39	-60.6	Dark	Up	58.2	252.0	Up	07:36:49 - 07:56:29	5258
Summerland	07:46:39	-60.7	Dark	Up	58.2	252.3	Up	07:36:49 - 07:56:29	5242
Penticton	07:46:38	-60.8	Dark	Up	58.2	252.5	Up	07:36:48 - 07:56:28	5235
Oliver	07:46:38	-61.2	Dark	Up	58.3	253.1	Up	07:36:48 - 07:56:28	5197
Anarchist Mountain Observatory	07:46:37	-61.4	Dark	Up	58.2	253.5	Up	07:36:47 - 07:56:27	5179
Victoria	07:46:50	-61.2	Dark	Up	60.9	249.9	Up	07:37:00 - 07:56:40	5120
Okanogan	07:46:38	-62.0	Dark	Up	58.5	254.3	Up	07:36:48 - 07:56:28	5108
Brewster	07:46:38	-62.2	Dark	Up	58.7	254.5	Up	07:36:48 - 07:56:28	5078
Manson/Chelan	07:46:39	-62.4	Dark	Up	59.0	254.5	Up	07:36:49 - 07:56:29	5054
Wenatchee	07:46:39	-62.8	Dark	Up	59.2	255.1	Up	07:36:49 - 07:56:29	5001
Ellensburg	07:46:40	-63.2	Dark	Up	59.5	255.5	Up	07:36:50 - 07:56:30	4956
Yakima	07:46:40	-63.6	Dark	Up	59.6	256.2	Up	07:36:50 - 07:56:30	4911
Toppenish/White Swan	07:46:39	-63.8	Dark	Up	59.5	256.7	Up	07:36:49 - 07:56:29	4888
PNWRO	07:46:34	-64.4	Dark	Up	58.6	258.7	Up	07:36:44 - 07:56:24	4851
The Dalles	07:46:42	-64.4	Dark	Up	60.2	257.2	Up	07:36:52 - 07:56:32	4801
Maupin	07:46:41	-64.8	Dark	Up	60.3	258.1	Up	07:36:51 - 07:56:31	4755
Sisters	07:46:42	-65.6	Dark	Up	60.8	259.1	Up	07:36:52 - 07:56:32	4657
Bend	07:46:41	-65.9	Dark	Up	60.6	259.8	Up	07:36:51 - 07:56:31	4631
Oregon Observatory	07:46:41	-66.0	Dark	Up	60.8	260.0	Up	07:36:51 - 07:56:31	4612
Chiloquin	07:46:42	-67.2	Dark	Up	61.3	261.9	Up	07:36:52 - 07:56:32	4466
Klamath Falls	07:46:43	-67.5	Dark	Up	61.3	262.6	Up	07:36:53 - 07:56:33	4428
Cedarville	07:46:36	-68.5	Dark	Up	60.2	265.2	Up	07:36:46 - 07:56:26	4354
Dunrhomin	07:45:44	-69.0	Dark	Up	49.0	276.4	Up	07:35:54 - 07:55:34	4348
Nikitin	07:45:43	-69.2	Dark	Up	49.0	276.6	Up	07:35:53 - 07:55:33	4328
CU-SBO	07:45:44	-69.3	Dark	Up	49.0	276.7	Up	07:35:54 - 07:55:34	4320
Fall River/Burney	07:46:41	-68.7	Dark	Up	61.1	265.1	Up	07:36:51 - 07:56:31	4298
Greenville	07:46:38	-69.7	Dark	Up	60.8	267.0	Up	07:36:48 - 07:56:28	4198
Gimple	07:46:38	-69.7	Dark	Up	60.8	267.1	Up	07:36:48 - 07:56:28	4198
Quincy	07:46:39	-69.9	Dark	Up	60.8	267.4	Up	07:36:49 - 07:56:29	4175
Portola	07:46:37	-70.1	Dark	Up	60.5	267.9	Up	07:36:47 - 07:56:27	4162
Reno	07:46:34	-70.5	Dark	Up	60.0	268.8	Up	07:36:44 - 07:56:24	4134
Carson City	07:46:33	-70.9	Dark	Up	60.0	269.5	Up	07:36:43 - 07:56:23	4095
Yerington	07:46:31	-71.2	Dark	Up	59.5	270.2	Up	07:36:41 - 07:56:21	4075
Gardnerville	07:46:33	-71.1	Dark	Up	60.0	269.9	Up	07:36:43 - 07:56:23	4068
Hawthorne	07:46:29	-71.7	Dark	Up	59.1	271.3	Up	07:36:39 - 07:56:19	4026
Lee Vining	07:46:31	-72.2	Dark	Up	59.5	272.0	Up	07:36:41 - 07:56:21	3961
Bishop	07:46:29	-72.9	Dark	Up	58.9	273.4	Up	07:36:39 - 07:56:19	3898
Beatty	07:46:22	-73.6	Dark	Up	57.5	274.9	Up	07:36:32 - 07:56:12	3855
Patrick	07:46:10	-75.3	Dark	Up	55.1	278.4	Up	07:36:20 - 07:56:00	3711
Laughlin/Bullhead City	07:46:13	-75.5	Dark	Up	55.6	278.5	Up	07:36:23 - 07:56:03	3678
Lake Havasu City	07:46:12	-76.2	Dark	Up	55.3	279.6	Up	07:36:22 - 07:56:02	3606
George/Scottsdale	07:46:02	-76.8	Dark	Up	53.2	281.5	Up	07:36:12 - 07:55:52	3543
Wildwood	07:46:29	-76.0	Dark	Up	58.7	278.6	Up	07:36:39 - 07:56:19	3535
Idyllwild	07:46:21	-76.7	Dark	Up	57.1	279.9	Up	07:36:31 - 07:56:11	3505
Calipatria	07:46:16	-77.5	Dark	Up	56.0	281.1	Up	07:36:26 - 07:56:06	3445
Yuma	07:46:13	-78.0	Dark	Up	55.2	282.0	Up	07:36:23 - 07:56:03	3405

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 523620, (2025/01/17 07:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.04  88
3Iot Aur       04:56:59.6 +33:09:58  2.7  2.54  81
14 Aur         05:15:24.3 +32:41:15  5.2  1.36  77
PPM 070028     05:12:09.6 +32:53:42  7.9  0.66  78
PPM 069982     05:09:46.9 +32:55:06  9.8  0.16  78
523620         05:09:02.5 +32:55:48 13.9        79
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:42:13 UT

RECON