RECON: TNO occultation with 469987

Event between (469987) 06HJ123 and star GA0740:12229330 with event index number of 2776249

Geocentric closest approach at 2029/06/21 05:49:24 UTC

J2000 position of star is 17:45:24.4 -14:23:01
Equinox of date position of star is 17:46:44.4 -14:23:30
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 71% illuminated.
Apparent brightness V=21.0

[RECON map]
Object is 30.8 AU from the Sun and 29.8 AU from the Earth.
Apparent velocity is 23.5 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 99 seconds.
The 1-sigma cross-track error in the shadow position is 1117 km.
The sky-plane scale is 21632.4 km/arcsec.

The object has an absolute magnitude Hv=6.1
Diameter=359.8 km assuming a 5% albedo -- 15.3 sec chord
Diameter=146.9 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is 3:2E

Star training set for 469987, (2029/06/21 05:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.2 -26:29:41  0.9 21.45  45
35Eta Oph      17:12:04.2 -15:45:33  2.6  8.56  55
PPM 233599     17:49:17.7 -14:44:03  5.9  0.63  64
PPM 233558     17:47:03.9 -14:27:22  8.3  0.06  63
469987         17:47:05.1 -14:23:37 16.6        64
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 33.5 km RECON observability=0.6 and success probability=0.0%

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

Sleaford 05:50:20 -12.7 AT Up 22.3 164.3 Low 05:41:35 - 05:59:05 6431

Kamloops 05:51:00 -10.3 NT Up 20.1 149.7 Low 05:42:15 - 05:59:45 6221

Kelowna 05:50:59 -11.3 NT Up 21.1 150.5 Low 05:42:14 - 05:59:44 6189

Peachland 05:51:00 -11.3 NT Up 21.1 150.2 Low 05:42:15 - 05:59:45 6179

Summerland 05:51:00 -11.5 NT Up 21.2 150.2 Low 05:42:15 - 05:59:45 6173

Penticton 05:51:00 -11.6 NT Up 21.3 150.3 Low 05:42:15 - 05:59:45 6170

Oliver 05:51:00 -11.9 NT Up 21.6 150.2 Low 05:42:15 - 05:59:45 6151

Anarchist Mountain Observatory 05:51:00 -12.1 AT Up 21.9 150.4 Low 05:42:15 - 05:59:45 6145

Okanogan 05:51:02 -12.6 AT Up 22.3 150.1 Low 05:42:17 - 05:59:47 6106

Brewster 05:51:03 -12.8 AT Up 22.5 149.8 Low 05:42:18 - 05:59:48 6089

Manson/Chelan 05:51:04 -12.8 AT Up 22.6 149.4 Low 05:42:19 - 05:59:49 6073

Victoria 05:51:05 -11.1 NT Up 20.9 146.4 Low 05:42:20 - 05:59:50 6069

Wenatchee 05:51:05 -13.2 AT Up 22.9 149.1 Low 05:42:20 - 05:59:50 6043

Ellensburg 05:51:05 -13.4 AT Up 23.2 148.8 Low 05:42:20 - 05:59:50 6017

Yakima 05:51:05 -13.8 AT Up 23.5 148.7 Low 05:42:20 - 05:59:50 5993

Toppenish/White Swan 05:51:05 -14.0 AT Up 23.8 148.8 Low 05:42:20 - 05:59:50 5983

PNWRO 05:51:04 -14.9 AT Up 24.6 150.2 Low 05:42:19 - 05:59:49 5980

The Dalles 05:51:05 -14.4 AT Up 24.2 147.9 Low 05:42:20 - 05:59:50 5927

Maupin 05:51:05 -14.8 AT Up 24.5 147.9 Low 05:42:20 - 05:59:50 5904

Sisters 05:51:05 -15.4 AT Up 25.1 147.2 Low 05:42:20 - 05:59:50 5846

Bend 05:51:05 -15.7 AT Up 25.4 147.4 Low 05:42:20 - 05:59:50 5834

Oregon Observatory 05:51:05 -15.8 AT Up 25.5 147.2 Low 05:42:20 - 05:59:50 5822

Dunrhomin 05:50:26 -24.1 Dark Up 33.8 163.4 Up 05:41:41 - 05:59:11 5773

Nikitin 05:50:27 -24.3 Dark Up 34.0 163.3 Up 05:41:42 - 05:59:12 5761

CU-SBO 05:50:27 -24.4 Dark Up 34.0 163.2 Up 05:41:42 - 05:59:12 5756

Chiloquin 05:51:05 -16.7 AT Up 26.4 146.4 Low 05:42:20 - 05:59:50 5735

Klamath Falls 05:51:05 -17.0 AT Up 26.8 146.4 Low 05:42:20 - 05:59:50 5714

Cedarville 05:51:05 -18.3 Dark Up 28.0 147.8 Low 05:42:20 - 05:59:50 5687

Fall River/Burney 05:51:05 -18.2 Dark Up 27.9 146.5 Low 05:42:20 - 05:59:50 5642

Gimple 05:51:05 -19.2 Dark Up 28.9 146.7 Low 05:42:20 - 05:59:50 5588

Greenville 05:51:05 -19.1 Dark Up 28.8 146.6 Low 05:42:20 - 05:59:50 5587

Quincy 05:51:05 -19.3 Dark Up 29.0 146.6 Low 05:42:20 - 05:59:50 5574

Portola 05:51:05 -19.6 Dark Up 29.3 147.0 Low 05:42:20 - 05:59:50 5570

Reno 05:51:05 -20.1 Dark Up 29.8 147.6 Low 05:42:20 - 05:59:50 5559

Carson City 05:51:05 -20.4 Dark Up 30.1 147.5 Up 05:42:20 - 05:59:50 5535

Yerington 05:51:05 -20.8 Dark Up 30.6 148.1 Up 05:42:20 - 05:59:50 5529

Gardnerville 05:51:05 -20.6 Dark Up 30.3 147.5 Up 05:42:20 - 05:59:50 5519

Hawthorne 05:51:05 -21.4 Dark Up 31.2 148.5 Up 05:42:20 - 05:59:50 5502

Lee Vining 05:51:05 -21.7 Dark Up 31.4 147.8 Up 05:42:20 - 05:59:50 5458

Bishop 05:51:05 -22.5 Dark Up 32.3 148.4 Up 05:42:20 - 05:59:50 5423

Beatty 05:51:05 -23.6 Dark Up 33.3 149.9 Up 05:42:20 - 05:59:50 5409

Patrick 05:51:00 -26.0 Dark Up 35.7 152.5 Up 05:42:15 - 05:59:45 5338

Laughlin/Bullhead City 05:51:03 -26.0 Dark Up 35.7 151.7 Up 05:42:18 - 05:59:48 5310

Lake Havasu City 05:51:03 -26.6 Dark Up 36.4 151.7 Up 05:42:18 - 05:59:48 5263

George/Scottsdale 05:50:54 -28.2 Dark Up 38.0 154.2 Up 05:42:09 - 05:59:39 5236

Wildwood 05:51:05 -25.2 Dark Up 34.9 147.0 Up 05:42:20 - 05:59:50 5182

Idyllwild 05:51:05 -26.4 Dark Up 36.1 148.8 Up 05:42:20 - 05:59:50 5176

Calipatria 05:51:05 -27.4 Dark Up 37.1 149.9 Up 05:42:20 - 05:59:50 5142

Yuma 05:51:05 -28.1 Dark Up 37.8 150.7 Up 05:42:20 - 05:59:50 5121

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 469987, (2029/06/21 05:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.45  45
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.56  55
PPM 233599     17:47:36.7 -14:43:34  5.9  0.63  64
PPM 233558     17:45:23.2 -14:26:47  8.3  0.06  63
469987         17:45:24.4 -14:23:01 16.6        63
Positions are for J2000

Event circumstances last updated at 2023/06/08 00:54:38 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	05:50:20	-12.7	AT	Up	22.3	164.3	Low	05:41:35 - 05:59:05	6431
Kamloops	05:51:00	-10.3	NT	Up	20.1	149.7	Low	05:42:15 - 05:59:45	6221
Kelowna	05:50:59	-11.3	NT	Up	21.1	150.5	Low	05:42:14 - 05:59:44	6189
Peachland	05:51:00	-11.3	NT	Up	21.1	150.2	Low	05:42:15 - 05:59:45	6179
Summerland	05:51:00	-11.5	NT	Up	21.2	150.2	Low	05:42:15 - 05:59:45	6173
Penticton	05:51:00	-11.6	NT	Up	21.3	150.3	Low	05:42:15 - 05:59:45	6170
Oliver	05:51:00	-11.9	NT	Up	21.6	150.2	Low	05:42:15 - 05:59:45	6151
Anarchist Mountain Observatory	05:51:00	-12.1	AT	Up	21.9	150.4	Low	05:42:15 - 05:59:45	6145
Okanogan	05:51:02	-12.6	AT	Up	22.3	150.1	Low	05:42:17 - 05:59:47	6106
Brewster	05:51:03	-12.8	AT	Up	22.5	149.8	Low	05:42:18 - 05:59:48	6089
Manson/Chelan	05:51:04	-12.8	AT	Up	22.6	149.4	Low	05:42:19 - 05:59:49	6073
Victoria	05:51:05	-11.1	NT	Up	20.9	146.4	Low	05:42:20 - 05:59:50	6069
Wenatchee	05:51:05	-13.2	AT	Up	22.9	149.1	Low	05:42:20 - 05:59:50	6043
Ellensburg	05:51:05	-13.4	AT	Up	23.2	148.8	Low	05:42:20 - 05:59:50	6017
Yakima	05:51:05	-13.8	AT	Up	23.5	148.7	Low	05:42:20 - 05:59:50	5993
Toppenish/White Swan	05:51:05	-14.0	AT	Up	23.8	148.8	Low	05:42:20 - 05:59:50	5983
PNWRO	05:51:04	-14.9	AT	Up	24.6	150.2	Low	05:42:19 - 05:59:49	5980
The Dalles	05:51:05	-14.4	AT	Up	24.2	147.9	Low	05:42:20 - 05:59:50	5927
Maupin	05:51:05	-14.8	AT	Up	24.5	147.9	Low	05:42:20 - 05:59:50	5904
Sisters	05:51:05	-15.4	AT	Up	25.1	147.2	Low	05:42:20 - 05:59:50	5846
Bend	05:51:05	-15.7	AT	Up	25.4	147.4	Low	05:42:20 - 05:59:50	5834
Oregon Observatory	05:51:05	-15.8	AT	Up	25.5	147.2	Low	05:42:20 - 05:59:50	5822
Dunrhomin	05:50:26	-24.1	Dark	Up	33.8	163.4	Up	05:41:41 - 05:59:11	5773
Nikitin	05:50:27	-24.3	Dark	Up	34.0	163.3	Up	05:41:42 - 05:59:12	5761
CU-SBO	05:50:27	-24.4	Dark	Up	34.0	163.2	Up	05:41:42 - 05:59:12	5756
Chiloquin	05:51:05	-16.7	AT	Up	26.4	146.4	Low	05:42:20 - 05:59:50	5735
Klamath Falls	05:51:05	-17.0	AT	Up	26.8	146.4	Low	05:42:20 - 05:59:50	5714
Cedarville	05:51:05	-18.3	Dark	Up	28.0	147.8	Low	05:42:20 - 05:59:50	5687
Fall River/Burney	05:51:05	-18.2	Dark	Up	27.9	146.5	Low	05:42:20 - 05:59:50	5642
Gimple	05:51:05	-19.2	Dark	Up	28.9	146.7	Low	05:42:20 - 05:59:50	5588
Greenville	05:51:05	-19.1	Dark	Up	28.8	146.6	Low	05:42:20 - 05:59:50	5587
Quincy	05:51:05	-19.3	Dark	Up	29.0	146.6	Low	05:42:20 - 05:59:50	5574
Portola	05:51:05	-19.6	Dark	Up	29.3	147.0	Low	05:42:20 - 05:59:50	5570
Reno	05:51:05	-20.1	Dark	Up	29.8	147.6	Low	05:42:20 - 05:59:50	5559
Carson City	05:51:05	-20.4	Dark	Up	30.1	147.5	Up	05:42:20 - 05:59:50	5535
Yerington	05:51:05	-20.8	Dark	Up	30.6	148.1	Up	05:42:20 - 05:59:50	5529
Gardnerville	05:51:05	-20.6	Dark	Up	30.3	147.5	Up	05:42:20 - 05:59:50	5519
Hawthorne	05:51:05	-21.4	Dark	Up	31.2	148.5	Up	05:42:20 - 05:59:50	5502
Lee Vining	05:51:05	-21.7	Dark	Up	31.4	147.8	Up	05:42:20 - 05:59:50	5458
Bishop	05:51:05	-22.5	Dark	Up	32.3	148.4	Up	05:42:20 - 05:59:50	5423
Beatty	05:51:05	-23.6	Dark	Up	33.3	149.9	Up	05:42:20 - 05:59:50	5409
Patrick	05:51:00	-26.0	Dark	Up	35.7	152.5	Up	05:42:15 - 05:59:45	5338
Laughlin/Bullhead City	05:51:03	-26.0	Dark	Up	35.7	151.7	Up	05:42:18 - 05:59:48	5310
Lake Havasu City	05:51:03	-26.6	Dark	Up	36.4	151.7	Up	05:42:18 - 05:59:48	5263
George/Scottsdale	05:50:54	-28.2	Dark	Up	38.0	154.2	Up	05:42:09 - 05:59:39	5236
Wildwood	05:51:05	-25.2	Dark	Up	34.9	147.0	Up	05:42:20 - 05:59:50	5182
Idyllwild	05:51:05	-26.4	Dark	Up	36.1	148.8	Up	05:42:20 - 05:59:50	5176
Calipatria	05:51:05	-27.4	Dark	Up	37.1	149.9	Up	05:42:20 - 05:59:50	5142
Yuma	05:51:05	-28.1	Dark	Up	37.8	150.7	Up	05:42:20 - 05:59:50	5121