RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1340:01540382 with event index number of 2628281

Geocentric closest approach at 2026/03/03 06:20:15 UTC

J2000 position of star is 03:43:51.6 +44:13:29
Equinox of date position of star is 03:45:26.5 +44:17:44
Stellar brightness G=16.4, 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 100% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 15.1 AU from the Sun and 15.2 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 2863 km.
The sky-plane scale is 11043.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 2.8 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2026/03/03 06:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:25.5 +16:33:36  0.8 29.82  90
Mirphak        03:26:12.3 +49:57:08  1.8  6.54  97
PPM 046552     03:50:57.0 +44:02:30  6.1  0.98  95
PPM 046478     03:46:14.9 +44:26:17  8.3  0.17  95
517717         03:45:40.3 +44:18:21 16.4        95
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 4.3 sigma about the mid-time.
The median site spacing is 14.4 km RECON observability=1.0 and success probability=2.1%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
CU-SBO	06:19:52	-54.7	Dark	Up	23.7	308.7	Low	06:04:52 - 06:34:52	7320
George/Scottsdale	06:20:35	-57.5	Dark	Up	23.8	308.5	Low	06:05:35 - 06:35:35	7315
Dunrhomin	06:19:51	-54.5	Dark	Up	23.8	308.7	Low	06:04:51 - 06:34:51	7314
Yuma	06:20:47	-56.8	Dark	Up	25.0	308.0	Low	06:05:47 - 06:35:47	7236
Patrick	06:20:17	-55.1	Dark	Up	26.2	307.1	Low	06:05:17 - 06:35:17	7213
Lake Havasu City	06:20:38	-55.6	Dark	Up	25.9	307.4	Low	06:05:38 - 06:35:38	7210
Calipatria	06:20:47	-55.9	Dark	Up	25.9	307.5	Low	06:05:47 - 06:35:47	7193
Laughlin/Bullhead City	06:20:36	-54.9	Dark	Up	26.5	307.0	Low	06:05:36 - 06:35:36	7185
Idyllwild	06:20:47	-54.8	Dark	Up	27.0	306.9	Low	06:05:47 - 06:35:47	7135
Beatty	06:20:17	-52.4	Dark	Up	29.0	305.5	Low	06:05:17 - 06:35:17	7069
Wildwood	06:20:50	-53.4	Dark	Up	28.5	306.2	Low	06:05:50 - 06:35:50	7049
Bishop	06:20:17	-51.2	Dark	Up	30.3	304.7	Up	06:05:17 - 06:35:17	6994
Hawthorne	06:20:17	-50.2	Dark	Up	31.1	304.1	Up	06:05:17 - 06:35:17	6950
Lee Vining	06:20:17	-50.4	Dark	Up	31.1	304.2	Up	06:05:17 - 06:35:17	6949
Yerington	06:20:17	-49.6	Dark	Up	31.7	303.7	Up	06:05:17 - 06:35:17	6914
Gardnerville	06:20:17	-49.3	Dark	Up	32.1	303.5	Up	06:05:17 - 06:35:17	6893
Carson City	06:20:17	-49.1	Dark	Up	32.3	303.3	Up	06:05:17 - 06:35:17	6883
Reno	06:20:17	-48.9	Dark	Up	32.5	303.1	Up	06:05:17 - 06:35:17	6871
Portola	06:20:17	-48.3	Dark	Up	33.0	302.8	Up	06:05:17 - 06:35:17	6837
Quincy	06:20:17	-48.0	Dark	Up	33.4	302.5	Up	06:05:17 - 06:35:17	6813
Gimple	06:20:17	-47.9	Dark	Up	33.5	302.4	Up	06:05:17 - 06:35:17	6810
Greenville	06:20:17	-47.8	Dark	Up	33.5	302.4	Up	06:05:17 - 06:35:17	6807
Cedarville	06:20:17	-47.3	Dark	Up	33.8	301.9	Up	06:05:17 - 06:35:17	6794
Fall River/Burney	06:20:17	-46.9	Dark	Up	34.3	301.7	Up	06:05:17 - 06:35:17	6759
Sleaford	06:19:04	-43.2	Dark	Up	31.3	303.2	Up	06:04:04 - 06:34:04	6756
Klamath Falls	06:20:17	-45.9	Dark	Up	35.2	300.9	Up	06:05:17 - 06:35:17	6706
Chiloquin	06:20:16	-45.6	Dark	Up	35.4	300.6	Up	06:05:16 - 06:35:16	6692
PNWRO	06:19:57	-44.5	Dark	Up	35.3	299.8	Up	06:04:57 - 06:34:57	6685
Oregon Observatory	06:20:11	-44.9	Dark	Up	35.8	300.0	Up	06:05:11 - 06:35:11	6665
Bend	06:20:10	-44.8	Dark	Up	35.8	299.9	Up	06:05:10 - 06:35:10	6665
Sisters	06:20:09	-44.5	Dark	Up	36.1	299.7	Up	06:05:09 - 06:35:09	6646
Maupin	06:20:05	-44.1	Dark	Up	36.2	299.3	Up	06:05:05 - 06:35:05	6634
Toppenish/White Swan	06:19:58	-43.5	Dark	Up	36.4	298.8	Up	06:04:58 - 06:34:58	6615
The Dalles	06:20:03	-43.7	Dark	Up	36.5	299.0	Up	06:05:03 - 06:35:03	6614
Yakima	06:19:57	-43.3	Dark	Up	36.6	298.6	Up	06:04:57 - 06:34:57	6601
Ellensburg	06:19:55	-43.0	Dark	Up	36.8	298.4	Up	06:04:55 - 06:34:55	6585
Wenatchee	06:19:53	-42.7	Dark	Up	36.9	298.2	Up	06:04:53 - 06:34:53	6577
Brewster	06:19:49	-42.4	Dark	Up	36.9	298.0	Up	06:04:49 - 06:34:49	6569
Okanogan	06:19:47	-42.3	Dark	Up	36.9	297.9	Up	06:04:47 - 06:34:47	6565
Manson/Chelan	06:19:50	-42.4	Dark	Up	37.0	298.0	Up	06:04:50 - 06:34:50	6564
Anarchist Mountain Observatory	06:19:44	-41.9	Dark	Up	37.1	297.6	Up	06:04:44 - 06:34:44	6546
Oliver	06:19:44	-41.7	Dark	Up	37.3	297.4	Up	06:04:44 - 06:34:44	6531
Penticton	06:19:42	-41.4	Dark	Up	37.4	297.1	Up	06:04:42 - 06:34:42	6515
Summerland	06:19:42	-41.3	Dark	Up	37.5	297.0	Up	06:04:42 - 06:34:42	6509
Kelowna	06:19:40	-41.2	Dark	Up	37.5	297.0	Up	06:04:40 - 06:34:40	6504
Peachland	06:19:41	-41.1	Dark	Up	37.6	296.9	Up	06:04:41 - 06:34:41	6499
Kamloops	06:19:38	-40.2	Dark	Up	38.4	295.9	Up	06:04:38 - 06:34:38	6437
Victoria	06:19:53	-40.5	Dark	Up	39.2	295.9	Up	06:04:53 - 06:34:53	6415

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 517717, (2026/03/03 06:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 29.82  90
Mirphak        03:24:19.4 +49:51:40  1.8  6.54  97
PPM 046552     03:49:08.1 +43:57:49  6.1  0.98  95
PPM 046478     03:44:25.9 +44:21:26  8.3  0.17  95
517717         03:43:51.6 +44:13:29 16.4        95
Positions are for J2000

Event circumstances last updated at 2022/11/01 01:38:47 UT

RECON