RECON: TNO occultation with 15820

Event between (15820) 94TB and star GA1220:01047331 with event index number of 1318623

Geocentric closest approach at 2023/12/18 04:43:33 UTC

J2000 position of star is 04:28:41.4 +33:26:49
Equinox of date position of star is 04:30:14.6 +33:29:54
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 96 degrees from the moon. Moon is 32% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 27.2 AU from the Sun and 26.2 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 1174 km.
The sky-plane scale is 19035.1 km/arcsec.

The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 8.0 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 15820, (2023/12/18 04:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.9 +16:33:20  0.8 17.02  94
3Iot Aur       04:58:33.5 +33:12:06  2.7  5.92 102
56 Per         04:26:11.0 +34:00:47  6.2  0.99  95
PPM 069445     04:31:36.3 +32:33:44  7.9  0.98  96
PPM 069424     04:29:37.4 +33:33:57  9.8  0.15  96
15820          04:30:14.7 +33:29:54 16.0        96
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 31.5 km RECON observability=1.0 and success probability=61.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	04:44:36	-43.9	Dark	Up	62.3	116.9	Up	04:32:11 - 04:57:01	471
Victoria	04:44:50	-42.7	Dark	Up	61.3	109.5	Up	04:32:25 - 04:57:15	393
Peachland	04:44:37	-44.6	Dark	Up	63.0	116.1	Up	04:32:12 - 04:57:02	370
Kelowna	04:44:36	-44.7	Dark	Up	63.1	116.7	Up	04:32:11 - 04:57:01	370
Summerland	04:44:37	-44.7	Dark	Up	63.1	116.0	Up	04:32:12 - 04:57:02	354
Penticton	04:44:37	-44.8	Dark	Up	63.2	116.0	Up	04:32:12 - 04:57:02	344
Oliver	04:44:38	-44.9	Dark	Up	63.4	115.4	Up	04:32:13 - 04:57:03	313
Anarchist Mountain Observatory	04:44:38	-45.1	Dark	Up	63.6	115.3	Up	04:32:13 - 04:57:03	292
Okanogan	04:44:41	-45.1	Dark	Up	63.7	113.8	Up	04:32:16 - 04:57:06	242
Brewster	04:44:42	-45.1	Dark	Up	63.7	113.1	Up	04:32:17 - 04:57:07	225
Manson/Chelan	04:44:43	-44.9	Dark	Up	63.6	112.2	Up	04:32:18 - 04:57:08	220
Wenatchee	04:44:45	-44.9	Dark	Up	63.6	111.2	Up	04:32:20 - 04:57:10	183
Sleaford	04:43:56	-51.3	Dark	Down	68.2	142.8	Up	04:31:31 - 04:56:21	165
Ellensburg	04:44:47	-44.9	Dark	Up	63.6	110.1	Up	04:32:22 - 04:57:12	155
Yakima	04:44:48	-45.0	Dark	Up	63.8	109.3	Up	04:32:23 - 04:57:13	119
Toppenish/White Swan	04:44:48	-45.1	Dark	Up	64.0	109.1	Up	04:32:23 - 04:57:13	93
The Dalles	04:44:52	-44.8	Dark	Up	63.7	106.7	Up	04:32:27 - 04:57:17	53
Maupin	04:44:53	-45.0	Dark	Up	63.9	106.0	Up	04:32:28 - 04:57:18	12
PNWRO	04:44:45	-46.2	Dark	Up	65.0	110.2	Up	04:32:20 - 04:57:10	5
Sisters	04:44:57	-44.8	Dark	Up	63.8	103.8	Up	04:32:32 - 04:57:22	-49
Bend	04:44:57	-45.0	Dark	Up	64.0	103.6	Up	04:32:32 - 04:57:22	-80
Oregon Observatory	04:44:58	-45.0	Dark	Up	64.0	103.1	Up	04:32:33 - 04:57:23	-91
Chiloquin	04:45:03	-44.9	Dark	Up	63.9	100.1	Up	04:32:38 - 04:57:28	-194
Klamath Falls	04:45:03	-45.0	Dark	Up	64.1	99.4	Up	04:32:38 - 04:57:28	-228
Fall River/Burney	04:45:06	-45.5	Dark	Up	64.5	97.4	Up	04:32:41 - 04:57:31	-352
Cedarville	04:45:01	-46.3	Dark	Up	65.3	99.5	Up	04:32:36 - 04:57:26	-356
Greenville	04:45:07	-45.9	Dark	Up	65.0	95.8	Up	04:32:42 - 04:57:32	-454
Gimple	04:45:06	-46.0	Dark	Up	65.0	95.9	Up	04:32:41 - 04:57:31	-458
Quincy	04:45:07	-46.0	Dark	Up	65.0	95.4	Up	04:32:42 - 04:57:32	-473
Portola	04:45:06	-46.3	Dark	Up	65.4	95.5	Up	04:32:41 - 04:57:31	-504
Reno	04:45:05	-46.9	Dark	Up	65.9	95.5	Up	04:32:40 - 04:57:30	-556
Carson City	04:45:06	-46.9	Dark	Up	65.9	94.7	Up	04:32:41 - 04:57:31	-591
Gardnerville	04:45:06	-47.0	Dark	Up	66.0	94.2	Up	04:32:41 - 04:57:31	-615
Yerington	04:45:04	-47.4	Dark	Up	66.4	94.7	Up	04:32:39 - 04:57:29	-635
Hawthorne	04:45:04	-47.9	Dark	Up	66.9	94.1	Up	04:32:39 - 04:57:29	-701
Lee Vining	04:45:07	-47.6	Dark	Up	66.5	92.4	Up	04:32:42 - 04:57:32	-734
Bishop	04:45:06	-48.2	Dark	Up	67.1	91.5	Up	04:32:41 - 04:57:31	-821
Beatty	04:45:02	-49.6	Dark	Up	68.4	91.4	Up	04:32:37 - 04:57:27	-932
Dunrhomin	04:44:17	-57.4	Dark	Up	76.4	115.4	Up	04:31:52 - 04:56:42	-1020
Nikitin	04:44:18	-57.5	Dark	Up	76.5	114.7	Up	04:31:53 - 04:56:43	-1037
CU-SBO	04:44:18	-57.5	Dark	Up	76.5	114.3	Up	04:31:53 - 04:56:43	-1042
Wildwood	04:45:15	-48.3	Dark	Up	66.9	83.7	Up	04:32:50 - 04:57:40	-1127
Laughlin/Bullhead City	04:44:59	-51.5	Dark	Up	70.2	88.1	Up	04:32:34 - 04:57:24	-1189
Patrick	04:44:56	-52.0	Dark	Up	70.8	89.1	Up	04:32:31 - 04:57:21	-1193
Idyllwild	04:45:09	-49.9	Dark	Up	68.4	83.5	Up	04:32:44 - 04:57:34	-1242
Lake Havasu City	04:45:00	-51.8	Dark	Up	70.4	86.3	Up	04:32:35 - 04:57:25	-1266
Calipatria	04:45:07	-50.9	Dark	Up	69.3	82.2	Up	04:32:42 - 04:57:32	-1351
Yuma	04:45:05	-51.7	Dark	Up	69.9	81.3	Up	04:32:40 - 04:57:30	-1431
George/Scottsdale	04:44:53	-53.9	Dark	Up	72.3	84.9	Up	04:32:28 - 04:57:18	-1441

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 15820, (2023/12/18 04:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 17.02  94
3Iot Aur       04:56:59.6 +33:09:58  2.7  5.92 102
56 Per         04:24:37.6 +33:57:34  6.2  0.99  95
PPM 069445     04:30:03.7 +32:30:42  7.9  0.98  96
PPM 069424     04:28:04.1 +33:30:51  9.8  0.15  96
15820          04:28:41.4 +33:26:49 16.0        96
Positions are for J2000

Event circumstances last updated at 2023/12/15 05:23:47 UT

RECON