RECON: TNO occultation with 03LD9

Event between 03LD9 and star GA0700:24507440 with event index number of 1663249

Geocentric closest approach at 2023/06/29 08:16:19 UTC

J2000 position of star is 18:27:53.0 -18:45:15
Equinox of date position of star is 18:29:15.2 -18:44:17
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 54 degrees from the moon. Moon is 79% illuminated.
Apparent brightness V=22.9

[RECON map]
Object is 43.2 AU from the Sun and 42.2 AU from the Earth.
Apparent velocity is 24.6 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 717 seconds.
The 1-sigma cross-track error in the shadow position is 2964 km.
The sky-plane scale is 30607.0 km/arcsec.

The object has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 12.0 sec chord
Diameter=120.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is SCATNEAR

Star training set for 03LD9, (2023/06/29 08:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.1 -26:28:56  0.9 28.33  27
Nunki          18:56:43.2 -26:15:55  2.0  9.84  60
PPM 234623     18:31:34.7 -18:42:42  5.5  0.55  55
PPM 234550     18:28:34.9 -18:56:16  8.4  0.26  54
03LD9          18:29:15.9 -18:44:16 16.8        55
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 1.3 sigma about the mid-time.
The median site spacing is 14.7 km RECON observability=1.0 and success probability=3.4%

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

Kamloops 08:16:01 -16.1 AT Up 20.5 183.9 Low 08:01:01 - 08:31:01 6083

Kelowna 08:15:58 -16.8 AT Up 21.3 184.8 Low 08:00:58 - 08:30:58 6046

Sleaford 08:15:23 -13.2 AT Down 17.4 198.0 Really Low 08:00:23 - 08:30:23 6046

Peachland 08:15:59 -17.0 AT Up 21.4 184.5 Low 08:00:59 - 08:30:59 6043

Summerland 08:15:59 -17.1 AT Up 21.5 184.6 Low 08:00:59 - 08:30:59 6037

Penticton 08:15:58 -17.2 AT Up 21.6 184.7 Low 08:00:58 - 08:30:58 6033

Oliver 08:15:59 -17.5 AT Up 21.9 184.7 Low 08:00:59 - 08:30:59 6019

Anarchist Mountain Observatory 08:15:58 -17.7 AT Up 22.1 184.9 Low 08:00:58 - 08:30:58 6011

Victoria 08:16:10 -18.2 Dark Up 22.7 180.8 Low 08:01:10 - 08:31:10 6003

Okanogan 08:15:57 -18.3 Dark Up 22.8 184.7 Low 08:00:57 - 08:30:57 5984

Brewster 08:15:58 -18.6 Dark Up 23.0 184.5 Low 08:00:58 - 08:30:58 5973

Manson/Chelan 08:16:00 -18.8 Dark Up 23.3 184.2 Low 08:01:00 - 08:31:00 5965

Wenatchee 08:16:00 -19.3 Dark Up 23.7 184.0 Low 08:01:00 - 08:31:00 5944

Ellensburg 08:16:01 -19.7 Dark Up 24.2 183.8 Low 08:01:01 - 08:31:01 5927

Yakima 08:16:01 -20.1 Dark Up 24.6 183.8 Low 08:01:01 - 08:31:01 5908

Toppenish/White Swan 08:16:00 -20.3 Dark Up 24.8 184.0 Low 08:01:00 - 08:31:00 5897

PNWRO 08:15:56 -20.7 Dark Up 25.1 185.5 Low 08:00:56 - 08:30:56 5873

The Dalles 08:16:02 -21.1 Dark Up 25.6 183.2 Low 08:01:02 - 08:31:02 5863

Maupin 08:16:02 -21.6 Dark Up 26.0 183.3 Low 08:01:02 - 08:31:02 5842

Sisters 08:16:03 -22.5 Dark Up 26.9 182.8 Low 08:01:03 - 08:31:03 5801

Bend 08:16:02 -22.7 Dark Up 27.1 183.1 Low 08:01:02 - 08:31:02 5788

Oregon Observatory 08:16:03 -22.9 Dark Up 27.3 182.9 Low 08:01:03 - 08:31:03 5780

Chiloquin 08:16:04 -24.2 Dark Up 28.6 182.5 Low 08:01:04 - 08:31:04 5712

Klamath Falls 08:16:04 -24.5 Dark Up 29.0 182.6 Low 08:01:04 - 08:31:04 5694

Cedarville 08:15:59 -25.2 Dark Up 29.6 184.4 Low 08:00:59 - 08:30:59 5649

Fall River/Burney 08:16:02 -25.7 Dark Up 30.1 183.1 Up 08:01:02 - 08:31:02 5627

Greenville 08:16:01 -26.6 Dark Up 31.0 183.6 Up 08:01:01 - 08:31:01 5574

Gimple 08:16:01 -26.6 Dark Up 31.0 183.7 Up 08:01:01 - 08:31:01 5573

Quincy 08:16:01 -26.8 Dark Up 31.2 183.6 Up 08:01:01 - 08:31:01 5562

Portola 08:16:00 -26.9 Dark Up 31.3 184.1 Up 08:01:00 - 08:31:00 5553

Reno 08:15:57 -27.1 Dark Up 31.6 184.8 Up 08:00:57 - 08:30:57 5535

Carson City 08:15:57 -27.5 Dark Up 31.9 184.9 Up 08:00:57 - 08:30:57 5513

Gardnerville 08:15:57 -27.7 Dark Up 32.2 185.0 Up 08:00:57 - 08:30:57 5499

Yerington 08:15:55 -27.7 Dark Up 32.1 185.6 Up 08:00:55 - 08:30:55 5499

Hawthorne 08:15:53 -28.1 Dark Up 32.5 186.2 Up 08:00:53 - 08:30:53 5468

Dunrhomin 08:15:09 -24.4 Dark Down 28.4 200.3 Low 08:00:09 - 08:30:09 5459

Nikitin 08:15:09 -24.6 Dark Down 28.6 200.3 Low 08:00:09 - 08:30:09 5448

CU-SBO 08:15:09 -24.7 Dark Down 28.7 200.3 Low 08:00:09 - 08:30:09 5445

Lee Vining 08:15:55 -28.7 Dark Up 33.1 185.7 Up 08:00:55 - 08:30:55 5437

Bishop 08:15:52 -29.2 Dark Up 33.6 186.6 Up 08:00:52 - 08:30:52 5396

Beatty 08:15:46 -29.6 Dark Up 33.9 188.4 Up 08:00:46 - 08:30:46 5357

Patrick 08:15:36 -30.7 Dark Up 35.0 191.8 Up 08:00:36 - 08:30:36 5240

Laughlin/Bullhead City 08:15:39 -31.0 Dark Up 35.3 191.1 Up 08:00:39 - 08:30:39 5229

Wildwood 08:15:52 -32.5 Dark Up 36.9 186.6 Up 08:00:52 - 08:30:52 5184

Lake Havasu City 08:15:37 -31.7 Dark Up 35.9 191.5 Up 08:00:37 - 08:30:37 5182

Idyllwild 08:15:45 -32.7 Dark Up 37.0 188.8 Up 08:00:45 - 08:30:45 5149

George/Scottsdale 08:15:28 -32.1 Dark Up 36.3 194.4 Up 08:00:28 - 08:30:28 5109

Calipatria 08:15:41 -33.2 Dark Up 37.5 190.3 Up 08:00:41 - 08:30:41 5098

Yuma 08:15:38 -33.5 Dark Up 37.8 191.4 Up 08:00:38 - 08:30:38 5061

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 03LD9, (2023/06/29 08:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.33  27
Nunki          18:55:15.9 -26:17:49  2.0  9.84  60
PPM 234623     18:30:11.9 -18:43:46  5.5  0.55  55
PPM 234550     18:27:12.0 -18:57:14  8.4  0.26  54
03LD9          18:27:53.0 -18:45:15 16.8        54
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:28:16 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)
Kamloops	08:16:01	-16.1	AT	Up	20.5	183.9	Low	08:01:01 - 08:31:01	6083
Kelowna	08:15:58	-16.8	AT	Up	21.3	184.8	Low	08:00:58 - 08:30:58	6046
Sleaford	08:15:23	-13.2	AT	Down	17.4	198.0	Really Low	08:00:23 - 08:30:23	6046
Peachland	08:15:59	-17.0	AT	Up	21.4	184.5	Low	08:00:59 - 08:30:59	6043
Summerland	08:15:59	-17.1	AT	Up	21.5	184.6	Low	08:00:59 - 08:30:59	6037
Penticton	08:15:58	-17.2	AT	Up	21.6	184.7	Low	08:00:58 - 08:30:58	6033
Oliver	08:15:59	-17.5	AT	Up	21.9	184.7	Low	08:00:59 - 08:30:59	6019
Anarchist Mountain Observatory	08:15:58	-17.7	AT	Up	22.1	184.9	Low	08:00:58 - 08:30:58	6011
Victoria	08:16:10	-18.2	Dark	Up	22.7	180.8	Low	08:01:10 - 08:31:10	6003
Okanogan	08:15:57	-18.3	Dark	Up	22.8	184.7	Low	08:00:57 - 08:30:57	5984
Brewster	08:15:58	-18.6	Dark	Up	23.0	184.5	Low	08:00:58 - 08:30:58	5973
Manson/Chelan	08:16:00	-18.8	Dark	Up	23.3	184.2	Low	08:01:00 - 08:31:00	5965
Wenatchee	08:16:00	-19.3	Dark	Up	23.7	184.0	Low	08:01:00 - 08:31:00	5944
Ellensburg	08:16:01	-19.7	Dark	Up	24.2	183.8	Low	08:01:01 - 08:31:01	5927
Yakima	08:16:01	-20.1	Dark	Up	24.6	183.8	Low	08:01:01 - 08:31:01	5908
Toppenish/White Swan	08:16:00	-20.3	Dark	Up	24.8	184.0	Low	08:01:00 - 08:31:00	5897
PNWRO	08:15:56	-20.7	Dark	Up	25.1	185.5	Low	08:00:56 - 08:30:56	5873
The Dalles	08:16:02	-21.1	Dark	Up	25.6	183.2	Low	08:01:02 - 08:31:02	5863
Maupin	08:16:02	-21.6	Dark	Up	26.0	183.3	Low	08:01:02 - 08:31:02	5842
Sisters	08:16:03	-22.5	Dark	Up	26.9	182.8	Low	08:01:03 - 08:31:03	5801
Bend	08:16:02	-22.7	Dark	Up	27.1	183.1	Low	08:01:02 - 08:31:02	5788
Oregon Observatory	08:16:03	-22.9	Dark	Up	27.3	182.9	Low	08:01:03 - 08:31:03	5780
Chiloquin	08:16:04	-24.2	Dark	Up	28.6	182.5	Low	08:01:04 - 08:31:04	5712
Klamath Falls	08:16:04	-24.5	Dark	Up	29.0	182.6	Low	08:01:04 - 08:31:04	5694
Cedarville	08:15:59	-25.2	Dark	Up	29.6	184.4	Low	08:00:59 - 08:30:59	5649
Fall River/Burney	08:16:02	-25.7	Dark	Up	30.1	183.1	Up	08:01:02 - 08:31:02	5627
Greenville	08:16:01	-26.6	Dark	Up	31.0	183.6	Up	08:01:01 - 08:31:01	5574
Gimple	08:16:01	-26.6	Dark	Up	31.0	183.7	Up	08:01:01 - 08:31:01	5573
Quincy	08:16:01	-26.8	Dark	Up	31.2	183.6	Up	08:01:01 - 08:31:01	5562
Portola	08:16:00	-26.9	Dark	Up	31.3	184.1	Up	08:01:00 - 08:31:00	5553
Reno	08:15:57	-27.1	Dark	Up	31.6	184.8	Up	08:00:57 - 08:30:57	5535
Carson City	08:15:57	-27.5	Dark	Up	31.9	184.9	Up	08:00:57 - 08:30:57	5513
Gardnerville	08:15:57	-27.7	Dark	Up	32.2	185.0	Up	08:00:57 - 08:30:57	5499
Yerington	08:15:55	-27.7	Dark	Up	32.1	185.6	Up	08:00:55 - 08:30:55	5499
Hawthorne	08:15:53	-28.1	Dark	Up	32.5	186.2	Up	08:00:53 - 08:30:53	5468
Dunrhomin	08:15:09	-24.4	Dark	Down	28.4	200.3	Low	08:00:09 - 08:30:09	5459
Nikitin	08:15:09	-24.6	Dark	Down	28.6	200.3	Low	08:00:09 - 08:30:09	5448
CU-SBO	08:15:09	-24.7	Dark	Down	28.7	200.3	Low	08:00:09 - 08:30:09	5445
Lee Vining	08:15:55	-28.7	Dark	Up	33.1	185.7	Up	08:00:55 - 08:30:55	5437
Bishop	08:15:52	-29.2	Dark	Up	33.6	186.6	Up	08:00:52 - 08:30:52	5396
Beatty	08:15:46	-29.6	Dark	Up	33.9	188.4	Up	08:00:46 - 08:30:46	5357
Patrick	08:15:36	-30.7	Dark	Up	35.0	191.8	Up	08:00:36 - 08:30:36	5240
Laughlin/Bullhead City	08:15:39	-31.0	Dark	Up	35.3	191.1	Up	08:00:39 - 08:30:39	5229
Wildwood	08:15:52	-32.5	Dark	Up	36.9	186.6	Up	08:00:52 - 08:30:52	5184
Lake Havasu City	08:15:37	-31.7	Dark	Up	35.9	191.5	Up	08:00:37 - 08:30:37	5182
Idyllwild	08:15:45	-32.7	Dark	Up	37.0	188.8	Up	08:00:45 - 08:30:45	5149
George/Scottsdale	08:15:28	-32.1	Dark	Up	36.3	194.4	Up	08:00:28 - 08:30:28	5109
Calipatria	08:15:41	-33.2	Dark	Up	37.5	190.3	Up	08:00:41 - 08:30:41	5098
Yuma	08:15:38	-33.5	Dark	Up	37.8	191.4	Up	08:00:38 - 08:30:38	5061