RECON: TNO occultation with 65489

Event between (65489) Ceto and star GA0900:04538901 with event index number of 2400426

Geocentric closest approach at 2027/04/11 07:09:49 UTC

J2000 position of star is 16:18:15.4 +00:19:36
Equinox of date position of star is 16:19:30.5 +00:16:07
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon. Moon is 22% illuminated.
Apparent brightness V=23.2

[RECON map]
Object is 46.4 AU from the Sun and 45.7 AU from the Earth.
Apparent velocity is 19.9 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 162 seconds.
The 1-sigma cross-track error in the shadow position is 2730 km.
The sky-plane scale is 33135.9 km/arcsec.

The object has an absolute magnitude Hv=6.5
Diameter=309.0 km assuming a 5% albedo -- 15.4 sec chord
Diameter=126.2 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is CENTAURR

Star training set for 65489, (2027/04/11 07:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.1 -26:29:24  0.9 26.89 174
1Del Oph       16:15:46.7 -03:45:44  2.7  4.14 154
PPM 199363     16:11:16.3 -03:32:12  5.0  4.34 154
PPM 162528     16:22:58.7 +00:00:50  8.2  0.87 151
PPM 162435     16:18:52.0 +00:20:56  9.7  0.21 151
PPM 162458     16:19:52.4 +00:20:03 10.3  0.09 151
65489          16:19:39.1 +00:15:43 16.7       151
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 31.6 km RECON observability=1.0 and success probability=25.4%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Sleaford 07:14:01 -29.6 Dark Up 27.1 130.4 Low 07:00:03 - 07:27:59 -195

Kamloops 07:14:29 -30.1 Dark Up 20.4 116.5 Low 07:00:31 - 07:28:27 -677

Kelowna 07:14:28 -31.1 Dark Up 21.3 117.0 Low 07:00:30 - 07:28:26 -738

Peachland 07:14:29 -31.1 Dark Up 21.2 116.7 Low 07:00:31 - 07:28:27 -756

Summerland 07:14:29 -31.3 Dark Up 21.3 116.7 Low 07:00:31 - 07:28:27 -769

Penticton 07:14:29 -31.4 Dark Up 21.4 116.8 Low 07:00:31 - 07:28:27 -773

Oliver 07:14:29 -31.7 Dark Up 21.6 116.6 Low 07:00:31 - 07:28:27 -808

Anarchist Mountain Observatory 07:14:30 -31.9 Dark Up 21.8 116.8 Low 07:00:32 - 07:28:28 -821

Okanogan 07:14:30 -32.5 Dark Up 21.9 116.3 Low 07:00:32 - 07:28:28 -890

Brewster 07:14:31 -32.7 Dark Up 21.9 116.1 Low 07:00:33 - 07:28:29 -922

Manson/Chelan 07:14:32 -32.9 Dark Up 21.8 115.7 Low 07:00:34 - 07:28:30 -951

Victoria 07:14:37 -31.7 Dark Up 19.6 113.1 Really Low 07:00:39 - 07:28:35 -955

Wenatchee 07:14:32 -33.3 Dark Up 21.9 115.4 Low 07:00:34 - 07:28:30 -1002

Ellensburg 07:14:32 -33.7 Dark Up 21.9 115.0 Low 07:00:34 - 07:28:30 -1049

Yakima 07:14:33 -34.1 Dark Up 22.1 114.9 Low 07:00:35 - 07:28:31 -1090

Toppenish/White Swan 07:14:32 -34.3 Dark Up 22.3 114.9 Low 07:00:34 - 07:28:30 -1109

PNWRO 07:14:31 -34.9 Dark Up 23.4 116.1 Low 07:00:33 - 07:28:29 -1111

The Dalles 07:14:36 -34.9 Dark Up 22.1 114.0 Low 07:00:38 - 07:28:34 -1206

Maupin 07:14:36 -35.3 Dark Up 22.4 113.9 Low 07:00:38 - 07:28:34 -1246

Dunrhomin 07:14:01 -41.4 Dark Down 34.8 125.5 Up 07:00:03 - 07:27:59 -1287

Nikitin 07:14:01 -41.6 Dark Down 34.9 125.4 Up 07:00:03 - 07:27:59 -1305

CU-SBO 07:14:01 -41.7 Dark Down 34.9 125.2 Up 07:00:03 - 07:27:59 -1314

Sisters 07:14:37 -36.1 Dark Up 22.4 113.2 Low 07:00:39 - 07:28:35 -1348

Bend 07:14:36 -36.4 Dark Up 22.7 113.3 Low 07:00:38 - 07:28:34 -1366

Oregon Observatory 07:14:36 -36.5 Dark Up 22.6 113.1 Low 07:00:38 - 07:28:34 -1387

Chiloquin 07:14:38 -37.7 Dark Up 22.9 112.3 Low 07:00:40 - 07:28:36 -1532

Klamath Falls 07:14:38 -38.0 Dark Up 23.1 112.2 Low 07:00:40 - 07:28:36 -1566

Cedarville 07:14:36 -39.0 Dark Up 24.4 113.2 Low 07:00:38 - 07:28:34 -1600

Fall River/Burney 07:14:38 -39.3 Dark Up 23.8 112.0 Low 07:00:40 - 07:28:36 -1680

Gimple 07:14:38 -40.2 Dark Up 24.5 112.1 Low 07:00:40 - 07:28:36 -1762

Greenville 07:14:38 -40.2 Dark Up 24.4 112.0 Low 07:00:40 - 07:28:36 -1764

Quincy 07:14:37 -40.4 Dark Up 24.5 111.9 Low 07:00:39 - 07:28:35 -1785

Portola 07:14:37 -40.6 Dark Up 24.9 112.2 Low 07:00:39 - 07:28:35 -1786

Reno 07:14:35 -41.0 Dark Up 25.5 112.6 Low 07:00:37 - 07:28:33 -1797

Carson City 07:14:34 -41.4 Dark Up 25.6 112.5 Low 07:00:36 - 07:28:32 -1834

Yerington 07:14:34 -41.7 Dark Up 26.1 112.9 Low 07:00:36 - 07:28:32 -1838

Gardnerville 07:14:36 -41.6 Dark Up 25.7 112.4 Low 07:00:38 - 07:28:34 -1859

Hawthorne 07:14:33 -42.2 Dark Down 26.7 113.1 Low 07:00:35 - 07:28:31 -1872

Lee Vining 07:14:34 -42.7 Dark Down 26.6 112.5 Low 07:00:36 - 07:28:32 -1944

Bishop 07:14:31 -43.4 Dark Down 27.3 112.7 Low 07:00:33 - 07:28:29 -1987

Beatty 07:14:28 -44.1 Dark Down 28.7 113.7 Low 07:00:30 - 07:28:26 -1990

Patrick 07:14:21 -46.0 Dark Down 31.4 115.2 Up 07:00:23 - 07:28:19 -2058

Laughlin/Bullhead City 07:14:23 -46.2 Dark Down 31.0 114.5 Up 07:00:25 - 07:28:21 -2105

Lake Havasu City 07:14:23 -46.9 Dark Down 31.5 114.3 Up 07:00:25 - 07:28:21 -2167

George/Scottsdale 07:14:17 -47.9 Dark Down 33.6 115.8 Up 07:00:19 - 07:28:15 -2168

Idyllwild 07:14:27 -47.3 Dark Down 29.9 112.1 Low 07:00:29 - 07:28:25 -2319

Wildwood 07:14:32 -46.5 Dark Down 28.4 111.0 Low 07:00:34 - 07:28:30 -2336

Calipatria 07:14:24 -48.0 Dark Down 31.1 112.7 Up 07:00:26 - 07:28:22 -2346

Yuma 07:14:22 -48.6 Dark Down 31.9 113.1 Up 07:00:24 - 07:28:20 -2364

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 65489, (2027/04/11 07:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 26.89 174
1Del Oph       16:14:20.7 -03:41:43  2.7  4.14 154
PPM 199363     16:09:50.5 -03:28:00  5.0  4.34 154
PPM 162528     16:21:34.8 +00:04:36  8.2  0.87 151
PPM 162435     16:17:28.3 +00:24:51  9.7  0.21 151
PPM 162458     16:18:28.7 +00:23:56 10.3  0.09 151
65489          16:18:15.4 +00:19:36 16.7       151
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:34 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	07:14:01	-29.6	Dark	Up	27.1	130.4	Low	07:00:03 - 07:27:59	-195
Kamloops	07:14:29	-30.1	Dark	Up	20.4	116.5	Low	07:00:31 - 07:28:27	-677
Kelowna	07:14:28	-31.1	Dark	Up	21.3	117.0	Low	07:00:30 - 07:28:26	-738
Peachland	07:14:29	-31.1	Dark	Up	21.2	116.7	Low	07:00:31 - 07:28:27	-756
Summerland	07:14:29	-31.3	Dark	Up	21.3	116.7	Low	07:00:31 - 07:28:27	-769
Penticton	07:14:29	-31.4	Dark	Up	21.4	116.8	Low	07:00:31 - 07:28:27	-773
Oliver	07:14:29	-31.7	Dark	Up	21.6	116.6	Low	07:00:31 - 07:28:27	-808
Anarchist Mountain Observatory	07:14:30	-31.9	Dark	Up	21.8	116.8	Low	07:00:32 - 07:28:28	-821
Okanogan	07:14:30	-32.5	Dark	Up	21.9	116.3	Low	07:00:32 - 07:28:28	-890
Brewster	07:14:31	-32.7	Dark	Up	21.9	116.1	Low	07:00:33 - 07:28:29	-922
Manson/Chelan	07:14:32	-32.9	Dark	Up	21.8	115.7	Low	07:00:34 - 07:28:30	-951
Victoria	07:14:37	-31.7	Dark	Up	19.6	113.1	Really Low	07:00:39 - 07:28:35	-955
Wenatchee	07:14:32	-33.3	Dark	Up	21.9	115.4	Low	07:00:34 - 07:28:30	-1002
Ellensburg	07:14:32	-33.7	Dark	Up	21.9	115.0	Low	07:00:34 - 07:28:30	-1049
Yakima	07:14:33	-34.1	Dark	Up	22.1	114.9	Low	07:00:35 - 07:28:31	-1090
Toppenish/White Swan	07:14:32	-34.3	Dark	Up	22.3	114.9	Low	07:00:34 - 07:28:30	-1109
PNWRO	07:14:31	-34.9	Dark	Up	23.4	116.1	Low	07:00:33 - 07:28:29	-1111
The Dalles	07:14:36	-34.9	Dark	Up	22.1	114.0	Low	07:00:38 - 07:28:34	-1206
Maupin	07:14:36	-35.3	Dark	Up	22.4	113.9	Low	07:00:38 - 07:28:34	-1246
Dunrhomin	07:14:01	-41.4	Dark	Down	34.8	125.5	Up	07:00:03 - 07:27:59	-1287
Nikitin	07:14:01	-41.6	Dark	Down	34.9	125.4	Up	07:00:03 - 07:27:59	-1305
CU-SBO	07:14:01	-41.7	Dark	Down	34.9	125.2	Up	07:00:03 - 07:27:59	-1314
Sisters	07:14:37	-36.1	Dark	Up	22.4	113.2	Low	07:00:39 - 07:28:35	-1348
Bend	07:14:36	-36.4	Dark	Up	22.7	113.3	Low	07:00:38 - 07:28:34	-1366
Oregon Observatory	07:14:36	-36.5	Dark	Up	22.6	113.1	Low	07:00:38 - 07:28:34	-1387
Chiloquin	07:14:38	-37.7	Dark	Up	22.9	112.3	Low	07:00:40 - 07:28:36	-1532
Klamath Falls	07:14:38	-38.0	Dark	Up	23.1	112.2	Low	07:00:40 - 07:28:36	-1566
Cedarville	07:14:36	-39.0	Dark	Up	24.4	113.2	Low	07:00:38 - 07:28:34	-1600
Fall River/Burney	07:14:38	-39.3	Dark	Up	23.8	112.0	Low	07:00:40 - 07:28:36	-1680
Gimple	07:14:38	-40.2	Dark	Up	24.5	112.1	Low	07:00:40 - 07:28:36	-1762
Greenville	07:14:38	-40.2	Dark	Up	24.4	112.0	Low	07:00:40 - 07:28:36	-1764
Quincy	07:14:37	-40.4	Dark	Up	24.5	111.9	Low	07:00:39 - 07:28:35	-1785
Portola	07:14:37	-40.6	Dark	Up	24.9	112.2	Low	07:00:39 - 07:28:35	-1786
Reno	07:14:35	-41.0	Dark	Up	25.5	112.6	Low	07:00:37 - 07:28:33	-1797
Carson City	07:14:34	-41.4	Dark	Up	25.6	112.5	Low	07:00:36 - 07:28:32	-1834
Yerington	07:14:34	-41.7	Dark	Up	26.1	112.9	Low	07:00:36 - 07:28:32	-1838
Gardnerville	07:14:36	-41.6	Dark	Up	25.7	112.4	Low	07:00:38 - 07:28:34	-1859
Hawthorne	07:14:33	-42.2	Dark	Down	26.7	113.1	Low	07:00:35 - 07:28:31	-1872
Lee Vining	07:14:34	-42.7	Dark	Down	26.6	112.5	Low	07:00:36 - 07:28:32	-1944
Bishop	07:14:31	-43.4	Dark	Down	27.3	112.7	Low	07:00:33 - 07:28:29	-1987
Beatty	07:14:28	-44.1	Dark	Down	28.7	113.7	Low	07:00:30 - 07:28:26	-1990
Patrick	07:14:21	-46.0	Dark	Down	31.4	115.2	Up	07:00:23 - 07:28:19	-2058
Laughlin/Bullhead City	07:14:23	-46.2	Dark	Down	31.0	114.5	Up	07:00:25 - 07:28:21	-2105
Lake Havasu City	07:14:23	-46.9	Dark	Down	31.5	114.3	Up	07:00:25 - 07:28:21	-2167
George/Scottsdale	07:14:17	-47.9	Dark	Down	33.6	115.8	Up	07:00:19 - 07:28:15	-2168
Idyllwild	07:14:27	-47.3	Dark	Down	29.9	112.1	Low	07:00:29 - 07:28:25	-2319
Wildwood	07:14:32	-46.5	Dark	Down	28.4	111.0	Low	07:00:34 - 07:28:30	-2336
Calipatria	07:14:24	-48.0	Dark	Down	31.1	112.7	Up	07:00:26 - 07:28:22	-2346
Yuma	07:14:22	-48.6	Dark	Down	31.9	113.1	Up	07:00:24 - 07:28:20	-2364