RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA1060:07150156 with event index number of 2229520

Geocentric closest approach at 2026/05/29 07:41:03 UTC

J2000 position of star is 18:56:26.4 +16:41:29
Equinox of date position of star is 18:57:32.1 +16:43:30
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 26.8 AU from the Sun and 26.2 AU from the Earth.
Apparent velocity is 22.1 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is 1405 km.
The sky-plane scale is 18993.4 km/arcsec.

The object has an absolute magnitude Hv=7.3
Diameter=209.9 km assuming a 5% albedo -- 9.5 sec chord
Diameter=85.7 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 

Star training set for 470309, (2026/05/29 07:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:49.9 +38:48:33  0.0 22.50  81
Tarazed        19:47:30.9 +10:40:46  2.7 13.54  80
PPM 135550     18:59:25.3 +17:23:53  6.2  0.80  73
PPM 135496     18:57:15.8 +16:48:36  9.1  0.12  72
470309         18:57:37.3 +16:43:40 14.9        72
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 23.0 km RECON observability=1.0 and success probability=41.2%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	07:43:48	-15.7	AT	Up	48.6	138.5	Up	07:37:40 - 07:49:56	-123
Kamloops	07:44:22	-17.6	AT	Up	42.6	120.4	Up	07:38:14 - 07:50:30	-594
Kelowna	07:44:20	-18.5	Dark	Up	43.5	120.7	Up	07:38:12 - 07:50:28	-661
Peachland	07:44:21	-18.6	Dark	Up	43.4	120.3	Up	07:38:13 - 07:50:29	-678
Summerland	07:44:20	-18.7	Dark	Up	43.5	120.3	Up	07:38:12 - 07:50:28	-692
Penticton	07:44:21	-18.8	Dark	Up	43.6	120.3	Up	07:38:13 - 07:50:29	-696
Oliver	07:44:20	-19.1	Dark	Up	43.8	120.0	Up	07:38:12 - 07:50:28	-733
Anarchist Mountain Observatory	07:44:20	-19.3	Dark	Up	44.0	120.1	Up	07:38:12 - 07:50:28	-747
Okanogan	07:44:20	-20.0	Dark	Up	44.2	119.3	Up	07:38:12 - 07:50:28	-818
Brewster	07:44:20	-20.2	Dark	Up	44.2	118.9	Up	07:38:12 - 07:50:28	-850
Victoria	07:44:29	-19.6	Dark	Up	41.9	115.5	Up	07:38:21 - 07:50:37	-873
Manson/Chelan	07:44:21	-20.4	Dark	Up	44.1	118.3	Up	07:38:13 - 07:50:29	-880
Wenatchee	07:44:21	-20.9	Dark	Up	44.2	117.7	Up	07:38:13 - 07:50:29	-933
Ellensburg	07:44:22	-21.3	Dark	Up	44.2	117.2	Up	07:38:14 - 07:50:30	-980
Yakima	07:44:22	-21.7	Dark	Up	44.4	116.8	Up	07:38:14 - 07:50:30	-1023
Toppenish/White Swan	07:44:21	-21.9	Dark	Up	44.6	116.8	Up	07:38:13 - 07:50:29	-1043
PNWRO	07:44:17	-22.3	Dark	Up	45.7	118.0	Up	07:38:09 - 07:50:25	-1050
The Dalles	07:44:23	-22.6	Dark	Up	44.5	115.3	Up	07:38:15 - 07:50:31	-1141
Maupin	07:44:23	-23.1	Dark	Up	44.7	115.0	Up	07:38:15 - 07:50:31	-1183
Dunrhomin	07:43:34	-27.2	Dark	Up	57.1	128.0	Up	07:37:26 - 07:49:42	-1263
Nikitin	07:43:34	-27.4	Dark	Up	57.2	127.8	Up	07:37:26 - 07:49:42	-1282
Sisters	07:44:24	-23.9	Dark	Up	44.8	113.7	Up	07:38:16 - 07:50:32	-1286
CU-SBO	07:43:34	-27.5	Dark	Up	57.2	127.6	Up	07:37:26 - 07:49:42	-1291
Bend	07:44:23	-24.2	Dark	Up	45.0	113.8	Up	07:38:15 - 07:50:31	-1306
Oregon Observatory	07:44:24	-24.3	Dark	Up	45.0	113.5	Up	07:38:16 - 07:50:32	-1327
Chiloquin	07:44:24	-25.6	Dark	Up	45.2	111.9	Up	07:38:16 - 07:50:32	-1476
Klamath Falls	07:44:24	-26.0	Dark	Up	45.4	111.6	Up	07:38:16 - 07:50:32	-1511
Cedarville	07:44:19	-26.8	Dark	Up	46.8	112.5	Up	07:38:11 - 07:50:27	-1551
Fall River/Burney	07:44:22	-27.2	Dark	Up	46.1	110.8	Up	07:38:14 - 07:50:30	-1629
Gimple	07:44:19	-28.1	Dark	Up	46.8	110.4	Up	07:38:11 - 07:50:27	-1715
Greenville	07:44:20	-28.1	Dark	Up	46.7	110.4	Up	07:38:12 - 07:50:28	-1716
Quincy	07:44:19	-28.3	Dark	Up	46.8	110.2	Up	07:38:11 - 07:50:27	-1738
Portola	07:44:19	-28.5	Dark	Up	47.2	110.5	Up	07:38:11 - 07:50:27	-1741
Reno	07:44:16	-28.7	Dark	Up	47.8	110.8	Up	07:38:08 - 07:50:24	-1754
Carson City	07:44:16	-29.1	Dark	Up	47.9	110.4	Up	07:38:08 - 07:50:24	-1792
Yerington	07:44:14	-29.3	Dark	Up	48.4	110.8	Up	07:38:06 - 07:50:22	-1798
Gardnerville	07:44:16	-29.4	Dark	Up	48.0	110.2	Up	07:38:08 - 07:50:24	-1817
Hawthorne	07:44:12	-29.8	Dark	Up	49.0	110.8	Up	07:38:04 - 07:50:20	-1835
Lee Vining	07:44:13	-30.4	Dark	Up	48.8	109.8	Up	07:38:05 - 07:50:21	-1907
Bishop	07:44:10	-31.0	Dark	Up	49.5	109.8	Up	07:38:02 - 07:50:18	-1953
Beatty	07:44:05	-31.5	Dark	Up	50.9	110.8	Up	07:37:57 - 07:50:13	-1960
Patrick	07:43:54	-32.9	Dark	Up	53.6	111.7	Up	07:37:46 - 07:50:02	-2036
Laughlin/Bullhead City	07:43:56	-33.2	Dark	Up	53.1	110.7	Up	07:37:48 - 07:50:04	-2082
Lake Havasu City	07:43:55	-33.8	Dark	Up	53.6	110.1	Up	07:37:47 - 07:50:03	-2146
George/Scottsdale	07:43:47	-34.5	Dark	Up	55.7	111.5	Up	07:37:39 - 07:49:55	-2153
Idyllwild	07:44:02	-34.6	Dark	Up	52.0	107.0	Up	07:37:54 - 07:50:10	-2294
Wildwood	07:44:07	-34.2	Dark	Up	50.4	105.9	Up	07:37:59 - 07:50:15	-2306
Calipatria	07:43:57	-35.2	Dark	Up	53.1	107.3	Up	07:37:49 - 07:50:05	-2325
Yuma	07:43:55	-35.6	Dark	Up	53.9	107.5	Up	07:37:47 - 07:50:03	-2345

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 470309, (2026/05/29 07:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 22.50  81
Tarazed        19:46:15.6 +10:36:48  2.7 13.54  80
PPM 135550     18:58:14.7 +17:21:39  6.2  0.80  73
PPM 135496     18:56:04.9 +16:46:27  9.1  0.12  72
470309         18:56:26.4 +16:41:29 14.9        72
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:25:20 UT

RECON