RECON: TNO occultation with 12WD37

Event between 12WD37 and star GA1220:03425185 with event index number of 2034749

Geocentric closest approach at 2024/03/15 02:49:26 UTC

J2000 position of star is 09:35:38.1 +32:48:28
Equinox of date position of star is 09:37:00.4 +32:42:15
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 75 degrees from the moon. Moon is 29% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 36.3 AU from the Sun and 35.5 AU from the Earth.
Apparent velocity is 19.0 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 172 seconds.
The 1-sigma cross-track error in the shadow position is 1366 km.
The sky-plane scale is 25780.5 km/arcsec.

The object has an absolute magnitude Hv=6.8
Diameter=259.4 km assuming a 5% albedo -- 13.8 sec chord
Diameter=105.9 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12WD37, (2024/03/15 02:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:39.6 +11:50:53  1.3 22.15  90
13 LMi         09:44:09.9 +34:58:54  6.1  2.72  76
PPM 074681     09:42:12.1 +32:53:18  8.3  1.09  76
PPM 074634     09:37:13.0 +32:29:54  9.9  0.20  75
12WD37         09:37:04.8 +32:41:55 14.9        76
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 **** km RECON observability=0.1 and success probability=26.9%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	02:52:21	-8.2	NT	Up	50.9	98.4	Up	02:37:31 - 03:07:12	2600
Kelowna	02:52:20	-8.8	NT	Up	51.6	98.2	Up	02:37:30 - 03:07:11	2500
Peachland	02:52:22	-8.7	NT	Up	51.4	97.8	Up	02:37:31 - 03:07:12	2496
Summerland	02:52:22	-8.8	NT	Up	51.5	97.7	Up	02:37:32 - 03:07:13	2479
Sleaford	02:51:36	-16.5	AT	Up	59.0	115.1	Up	02:36:45 - 03:06:26	2471
Penticton	02:52:22	-8.8	NT	Up	51.5	97.7	Up	02:37:31 - 03:07:12	2470
Victoria	02:52:35	-6.5	NT	Up	49.2	93.3	Up	02:37:45 - 03:07:26	2465
Oliver	02:52:23	-8.9	NT	Up	51.6	97.2	Up	02:37:32 - 03:07:13	2435
Anarchist Mountain Observatory	02:52:23	-9.0	NT	Up	51.7	97.2	Up	02:37:32 - 03:07:13	2414
Okanogan	02:52:25	-9.0	NT	Up	51.7	96.2	Up	02:37:35 - 03:07:16	2356
Brewster	02:52:26	-8.9	NT	Up	51.6	95.7	Up	02:37:35 - 03:07:16	2333
Manson/Chelan	02:52:27	-8.7	NT	Up	51.3	95.1	Up	02:37:37 - 03:07:18	2322
Wenatchee	02:52:29	-8.6	NT	Up	51.3	94.4	Up	02:37:39 - 03:07:20	2279
Ellensburg	02:52:32	-8.5	NT	Up	51.2	93.7	Up	02:37:41 - 03:07:22	2243
Yakima	02:52:32	-8.5	NT	Up	51.2	93.2	Up	02:37:42 - 03:07:23	2203
Toppenish/White Swan	02:52:33	-8.7	NT	Up	51.3	93.1	Up	02:37:42 - 03:07:23	2177
The Dalles	02:52:36	-8.2	NT	Up	50.8	91.5	Up	02:37:46 - 03:07:27	2120
PNWRO	02:52:28	-9.7	NT	Up	52.4	93.8	Up	02:37:38 - 03:07:19	2104
Maupin	02:52:37	-8.3	NT	Up	50.9	91.1	Up	02:37:47 - 03:07:28	2075
Sisters	02:52:41	-8.1	NT	Up	50.6	89.7	Up	02:37:50 - 03:07:31	2000
Bend	02:52:41	-8.3	NT	Up	50.7	89.6	Up	02:37:50 - 03:07:31	1970
Oregon Observatory	02:52:42	-8.2	NT	Up	50.6	89.3	Up	02:37:51 - 03:07:32	1956
Chiloquin	02:52:46	-8.0	NT	Up	50.3	87.4	Up	02:37:56 - 03:07:37	1834
Klamath Falls	02:52:47	-8.1	NT	Up	50.4	87.1	Up	02:37:56 - 03:07:37	1797
Cedarville	02:52:43	-9.4	NT	Up	51.5	87.2	Up	02:37:53 - 03:07:34	1683
Fall River/Burney	02:52:48	-8.5	NT	Up	50.6	85.9	Up	02:37:58 - 03:07:39	1667
Greenville	02:52:49	-8.9	NT	Up	50.9	85.0	Up	02:37:59 - 03:07:40	1562
Gimple	02:52:48	-9.0	NT	Up	50.9	85.1	Up	02:37:58 - 03:07:39	1559
Quincy	02:52:49	-9.0	NT	Up	50.8	84.8	Up	02:37:59 - 03:07:40	1541
Portola	02:52:48	-9.3	NT	Up	51.2	84.9	Up	02:37:58 - 03:07:39	1514
Reno	02:52:46	-9.9	NT	Up	51.7	84.9	Up	02:37:56 - 03:07:37	1469
Carson City	02:52:48	-9.9	NT	Up	51.6	84.5	Up	02:37:57 - 03:07:38	1432
Gardnerville	02:52:48	-10.0	NT	Up	51.7	84.2	Up	02:37:57 - 03:07:38	1405
Yerington	02:52:46	-10.4	NT	Up	52.1	84.6	Up	02:37:55 - 03:07:36	1394
Hawthorne	02:52:45	-10.9	NT	Up	52.5	84.2	Up	02:37:54 - 03:07:35	1331
Lee Vining	02:52:48	-10.6	NT	Up	52.0	83.3	Up	02:37:57 - 03:07:38	1286
Dunrhomin	02:51:53	-20.6	Dark	Up	62.7	95.3	Up	02:37:03 - 03:06:44	1216
Bishop	02:52:46	-11.2	NT	Up	52.5	82.9	Up	02:37:56 - 03:07:37	1204
Nikitin	02:51:54	-20.6	Dark	Up	62.7	95.0	Up	02:37:03 - 03:06:44	1197
CU-SBO	02:51:54	-20.6	Dark	Up	62.7	94.8	Up	02:37:04 - 03:06:45	1191
Beatty	02:52:41	-12.5	AT	Up	53.8	83.0	Up	02:37:51 - 03:07:32	1111
Patrick	02:52:34	-15.0	AT	Up	55.9	82.2	Up	02:37:43 - 03:07:24	880
Laughlin/Bullhead City	02:52:37	-14.5	AT	Up	55.3	81.5	Up	02:37:46 - 03:07:27	872
Wildwood	02:52:53	-11.4	NT	Up	51.9	78.6	Up	02:38:02 - 03:07:43	867
Lake Havasu City	02:52:37	-14.8	AT	Up	55.4	80.7	Up	02:37:46 - 03:07:27	794
Idyllwild	02:52:47	-12.9	AT	Up	53.3	78.8	Up	02:37:56 - 03:07:37	777
Calipatria	02:52:43	-14.0	AT	Up	54.1	78.4	Up	02:37:53 - 03:07:34	680
George/Scottsdale	02:52:29	-16.9	AT	Up	57.2	80.4	Up	02:37:38 - 03:07:19	650
Yuma	02:52:41	-14.8	AT	Up	54.8	78.0	Up	02:37:50 - 03:07:31	610

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 12WD37, (2024/03/15 02:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 22.15  90
13 LMi         09:42:42.7 +35:05:35  6.1  2.72  76
PPM 074681     09:40:45.8 +32:59:57  8.3  1.09  76
PPM 074634     09:35:46.5 +32:36:27  9.9  0.20  75
12WD37         09:35:38.1 +32:48:28 14.9        75
Positions are for J2000

Event circumstances last updated at 2022/12/24 04:04:12 UT

RECON