RECON: TNO occultation with 99OD4

Event between 99OD4 and star GA0840:19835442 with event index number of 2438870

Geocentric closest approach at 2021/10/16 02:00:05 UTC

J2000 position of star is 21:55:15.1 -05:03:32
Equinox of date position of star is 21:56:23.2 -04:57:19
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 12 degrees from the moon. Moon is 80% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 42.9 AU from the Sun and 42.3 AU from the Earth.
The TNO is moving 13.2 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 486 seconds.
The 1-sigma cross-track error in the shadow position is 5607 km.
The sky-plane scale is 30711.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 16.6 sec chord
Diameter=89.3 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 99OD4, (2021/10/16 02:00UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:51.0 -29:30:23  1.2 28.65  16
Markab         23:05:50.9 +15:19:22  2.5 26.59  34
PPM 205735     21:55:18.6 -04:10:23  5.4  0.83  13
PPM 205749     21:55:54.0 -05:09:44  8.1  0.24  12
99OD4          21:56:23.5 -04:57:18 15.5        12
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 1.9 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 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)
Victoria 01:59:58 -6.8 NT Up 27.3 137.1 Low 01:44:58 - 02:14:58 8176
Clarence Fulton 01:59:32 -9.5 NT Up 27.6 141.7 Low 01:44:32 - 02:14:32 8133
Peachland 01:59:34 -9.2 NT Up 27.8 141.1 Low 01:44:34 - 02:14:34 8128
Kelowna 01:59:35 -9.4 NT Up 27.9 141.5 Low 01:44:35 - 02:14:35 8124
Summerland 01:59:36 -9.3 NT Up 28.0 141.2 Low 01:44:36 - 02:14:36 8120
Penticton 01:59:37 -9.3 NT Up 28.1 141.3 Low 01:44:37 - 02:14:37 8115
Oliver 01:59:38 -9.3 NT Up 28.4 141.1 Low 01:44:38 - 02:14:38 8102
Anarchist Mountain Observatory 01:59:39 -9.4 NT Up 28.6 141.3 Low 01:44:39 - 02:14:39 8092
Tonasket 01:59:39 -9.4 NT Up 28.8 141.1 Low 01:44:39 - 02:14:39 8082
Okanogan 01:59:42 -9.3 NT Up 29.0 140.9 Low 01:44:42 - 02:14:42 8073
Manson/Chelan 01:59:48 -8.9 NT Up 29.1 140.1 Low 01:44:48 - 02:14:48 8070
Brewster 01:59:45 -9.1 NT Up 29.1 140.6 Low 01:44:45 - 02:14:45 8068
Wenatchee 01:59:52 -8.7 NT Up 29.4 139.8 Low 01:44:52 - 02:14:52 8056
Ellensburg 01:59:55 -8.6 NT Up 29.7 139.4 Low 01:44:55 - 02:14:55 8046
Yakima 01:59:57 -8.5 NT Up 30.0 139.3 Low 01:44:57 - 02:14:57 8031
Toppenish/White Swan 01:59:58 -8.6 NT Up 30.2 139.4 Up 01:44:58 - 02:14:58 8017
The Dalles 02:00:04 -8.1 NT Up 30.4 138.3 Up 01:45:04 - 02:15:04 8007
Goldendale 02:00:02 -8.3 NT Up 30.4 138.7 Up 01:45:02 - 02:15:02 8007
Maupin 02:00:07 -8.1 NT Up 30.8 138.2 Up 01:45:07 - 02:15:07 7987
Pasco 01:59:53 -9.5 NT Up 30.9 140.6 Up 01:44:53 - 02:14:53 7978
Sisters 02:00:14 -7.7 NT Up 31.2 137.4 Up 01:45:14 - 02:15:14 7963
PNWRO 01:59:53 -9.6 NT Up 31.2 140.8 Up 01:44:53 - 02:14:53 7961
Redmond 02:00:11 -8.0 NT Up 31.5 137.8 Up 01:45:11 - 02:15:11 7951
Bend 02:00:11 -7.9 NT Up 31.5 137.6 Up 01:45:11 - 02:15:11 7946
Oregon Observatory 02:00:17 -7.8 NT Up 31.6 137.4 Up 01:45:17 - 02:15:17 7942
La Pine/Gilchrist 02:00:17 -7.7 NT Up 31.7 137.2 Up 01:45:17 - 02:15:17 7935
North Lake 02:00:17 -8.1 NT Up 32.4 137.7 Up 01:45:17 - 02:15:17 7898
Chiloquin 02:00:25 -7.4 NT Up 32.4 136.4 Up 01:45:25 - 02:15:25 7894
Klamath Falls 02:00:27 -7.4 NT Up 32.7 136.4 Up 01:45:27 - 02:15:27 7876
Paisley 02:00:19 -8.3 NT Up 32.9 137.8 Up 01:45:19 - 02:15:19 7863
Lakeview 02:00:20 -8.4 NT Up 33.4 137.8 Up 01:45:20 - 02:15:20 7834
Fall River/Burney 02:00:31 -7.6 NT Up 33.7 136.2 Up 01:45:31 - 02:15:31 7809
Cedarville 02:00:23 -8.5 NT Up 34.0 137.7 Up 01:45:23 - 02:15:23 7797
Susanville 02:00:32 -8.1 NT Up 34.6 136.7 Up 01:45:32 - 02:15:32 7756
Greenville 02:00:34 -7.9 NT Up 34.6 136.3 Up 01:45:34 - 02:15:34 7751
Gimple 02:00:34 -7.9 NT Up 34.7 136.4 Up 01:45:34 - 02:15:34 7749
Quincy 02:00:36 -7.9 NT Up 34.8 136.2 Up 01:45:36 - 02:15:36 7741
Portola 02:00:34 -8.2 NT Up 35.1 136.6 Up 01:45:34 - 02:15:34 7721
Reno 02:00:32 -8.7 NT Up 35.7 137.2 Up 01:45:32 - 02:15:32 7687
Carson City 02:00:34 -8.7 NT Up 35.9 137.0 Up 01:45:34 - 02:15:34 7668
Gardnerville 02:00:34 -8.7 NT Up 36.1 136.9 Up 01:45:34 - 02:15:34 7654
Yerington 02:00:32 -9.1 NT Up 36.4 137.6 Up 01:45:32 - 02:15:32 7638
Hawthorne 02:00:32 -9.5 NT Up 37.0 137.9 Up 01:45:32 - 02:15:32 7597
Lee Vining 02:00:38 -9.1 NT Up 37.2 137.1 Up 01:45:38 - 02:15:38 7582
Tonopah 02:00:27 -10.6 NT Up 38.1 139.2 Up 01:45:27 - 02:15:27 7527
Bishop 02:00:37 -9.6 NT Up 38.0 137.6 Up 01:45:37 - 02:15:37 7526
CPSLO 02:01:00 -7.7 NT Up 38.3 134.2 Up 01:46:00 - 02:16:00 7480
Beatty 02:00:31 -10.9 NT Up 39.2 139.1 Up 01:45:31 - 02:15:31 7446
Indian Springs 02:00:27 -11.7 NT Up 40.0 140.1 Up 01:45:27 - 02:15:27 7391
Wildwood 02:00:55 -9.3 NT Up 40.3 135.6 Up 01:45:55 - 02:15:55 7342
Henderson 02:00:27 -12.3 AT Up 40.8 140.6 Up 01:45:27 - 02:15:27 7336
Laughlin/Bullhead City 02:00:29 -12.6 AT Up 41.7 140.5 Up 01:45:29 - 02:15:29 7270
Patrick 02:00:24 -13.1 AT Up 41.9 141.5 Up 01:45:24 - 02:15:24 7260
Idyllwild 02:00:47 -10.8 NT Up 41.7 137.4 Up 01:45:47 - 02:15:47 7257
Kingman/Dolan Springs 02:00:26 -13.0 AT Up 41.9 141.1 Up 01:45:26 - 02:15:26 7254
Mohave Valley 02:00:30 -12.6 AT Up 41.9 140.4 Up 01:45:30 - 02:15:30 7253
Dunrhomin 01:59:16 -19.7 Dark Up 41.3 153.9 Up 01:44:16 - 02:14:16 7238
Lake Havasu City 02:00:31 -12.8 AT Up 42.4 140.5 Up 01:45:31 - 02:15:31 7220
Parker 02:00:35 -12.8 AT Up 42.6 140.3 Up 01:45:35 - 02:15:35 7197
Calipatria 02:00:43 -11.7 NT Up 42.8 138.3 Up 01:45:43 - 02:15:43 7176
Blythe 02:00:39 -12.5 AT Up 42.9 139.7 Up 01:45:39 - 02:15:39 7175
Yuma 02:00:41 -12.5 AT Up 43.6 139.1 Up 01:45:41 - 02:15:41 7117
George/Scottsdale 02:00:21 -14.8 AT Up 44.2 142.9 Up 01:45:21 - 02:15:21 7083

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 99OD4, (2021/10/16 02:00UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 28.65  16
Markab         23:04:45.8 +15:12:18  2.5 26.59  34
PPM 205735     21:54:10.5 -04:16:36  5.4  0.83  13
PPM 205749     21:54:45.6 -05:15:58  8.1  0.24  12
99OD4          21:55:15.1 -05:03:32 15.5        12
Positions are for J2000

Event circumstances last updated at 2021/09/20 23:55:49 UT

Marc W. Buie, Southwest Research Institute

RECON