RECON: TNO occultation with 69987

Event between (69987) 98WA25 and star GA1120:01056667 with event index number of 361517

Geocentric closest approach at 2020/10/09 09:03:42 UTC

J2000 position of star is 05:15:09.7 +22:08:22
Equinox of date position of star is 05:16:23.9 +22:09:41
Stellar brightness G=15.2, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=26.4

[RECON map]
TNO is 42.4 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 9.2 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 942 seconds.
The 1-sigma cross-track error in the shadow position is 2883 km.
The sky-plane scale is 30452.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=229.1 km assuming a 5% albedo -- 6.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 69987, (2020/10/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.9 +16:32:58  0.8 10.83  30
Alnath         05:27:36.4 +28:37:23  1.6  6.94  17
108 Tau        05:16:42.7 +22:18:24  6.2  0.16  19
PPM 094196     05:16:00.8 +22:15:51 10.6  0.14  20
69987          05:16:24.6 +22:09:42 15.2        19
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 1.0 sigma about the mid-time.
The median site spacing is 23.0 km RECON observability=1.0 and success probability=10.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 09:07:27 -42.9 Dark Up 46.4 114.1 Up 08:52:27 - 09:22:27 -2999
Victoria 09:08:30 -45.6 Dark Up 44.7 108.6 Up 08:53:30 - 09:23:30 -3029
Kelowna 09:07:27 -43.3 Dark Up 46.5 113.6 Up 08:52:27 - 09:22:27 -3031
Peachland 09:07:27 -43.5 Dark Up 46.4 113.2 Up 08:52:27 - 09:22:27 -3035
Summerland 09:07:27 -43.6 Dark Up 46.5 113.1 Up 08:52:27 - 09:22:27 -3050
Penticton 09:07:27 -43.6 Dark Up 46.6 113.2 Up 08:52:27 - 09:22:27 -3058
Oliver 09:07:27 -43.9 Dark Up 46.7 112.8 Up 08:52:27 - 09:22:27 -3090
Anarchist Mountain Observatory 09:07:27 -44.0 Dark Up 46.9 112.9 Up 08:52:27 - 09:22:27 -3109
Tonasket 09:07:27 -44.3 Dark Up 47.0 112.5 Up 08:52:27 - 09:22:27 -3136
Okanogan 09:07:27 -44.7 Dark Up 47.0 112.0 Up 08:52:27 - 09:22:27 -3165
Brewster 09:07:27 -45.0 Dark Up 47.0 111.5 Up 08:52:27 - 09:22:27 -3187
Manson/Chelan 09:07:27 -45.3 Dark Up 46.8 110.9 Up 08:52:27 - 09:22:27 -3200
Entiat 09:07:27 -45.5 Dark Up 46.8 110.6 Up 08:52:27 - 09:22:27 -3219
Wenatchee 09:07:27 -45.7 Dark Up 46.9 110.3 Up 08:52:27 - 09:22:27 -3242
Yakima 09:08:29 -46.4 Dark Up 47.2 109.5 Up 08:53:29 - 09:23:29 -3265
Ellensburg 09:07:27 -46.2 Dark Up 46.9 109.7 Up 08:52:27 - 09:22:27 -3277
Toppenish/White Swan 09:08:28 -46.6 Dark Up 47.3 109.4 Up 08:53:28 - 09:23:28 -3288
Goldendale 09:08:35 -47.2 Dark Up 47.3 108.5 Up 08:53:35 - 09:23:35 -3325
The Dalles 09:08:39 -47.5 Dark Up 47.1 107.9 Up 08:53:39 - 09:23:39 -3335
Pasco 09:07:27 -46.3 Dark Up 48.0 110.3 Up 08:52:27 - 09:22:27 -3373
Maupin 09:08:41 -47.8 Dark Up 47.3 107.6 Up 08:53:41 - 09:23:41 -3374
PNWRO 09:07:27 -46.5 Dark Up 48.3 110.3 Up 08:52:27 - 09:22:27 -3400
Sisters 09:08:51 -48.8 Dark Up 47.3 106.3 Up 08:53:51 - 09:23:51 -3438
Redmond 09:08:48 -48.6 Dark Up 47.5 106.6 Up 08:53:48 - 09:23:48 -3451
Bend 09:08:49 -48.9 Dark Up 47.5 106.2 Up 08:53:49 - 09:23:49 -3466
Oregon Observatory 09:08:51 -49.1 Dark Up 47.5 105.9 Up 08:53:51 - 09:23:51 -3478
La Pine/Gilchrist 09:08:54 -49.3 Dark Up 47.5 105.7 Up 08:53:54 - 09:23:54 -3494
North Lake 09:08:52 -49.4 Dark Up 48.0 105.8 Up 08:53:52 - 09:23:52 -3550
Paisley 09:08:54 -49.8 Dark Up 48.4 105.5 Up 08:53:54 - 09:23:54 -3609
Klamath Falls 09:09:05 -50.6 Dark Up 47.7 103.9 Up 08:54:05 - 09:24:05 -3617
Lakeview 09:08:56 -50.1 Dark Up 48.7 105.1 Up 08:53:56 - 09:23:56 -3660
Cedarville 09:09:00 -50.6 Dark Up 49.0 104.6 Up 08:54:00 - 09:24:00 -3725
Fall River/Burney 09:09:10 -51.5 Dark Up 48.3 103.0 Up 08:54:10 - 09:24:10 -3735
Susanville 09:09:09 -51.7 Dark Up 48.9 102.9 Up 08:54:09 - 09:24:09 -3814
Greenville 09:09:14 -52.1 Dark Up 48.8 102.4 Up 08:54:14 - 09:24:14 -3831
Gimple 09:09:14 -52.0 Dark Up 48.9 102.5 Up 08:54:14 - 09:24:14 -3833
Quincy 09:09:14 -52.2 Dark Up 48.9 102.2 Up 08:54:14 - 09:24:14 -3850
Portola 09:09:12 -52.1 Dark Up 49.2 102.4 Up 08:54:12 - 09:24:12 -3875
Reno 09:09:10 -52.1 Dark Up 49.8 102.7 Up 08:54:10 - 09:24:10 -3918
Carson City 09:09:11 -52.4 Dark Up 49.9 102.3 Up 08:54:11 - 09:24:11 -3952
Gardnerville 09:09:14 -52.5 Dark Up 50.0 102.0 Up 08:54:14 - 09:24:14 -3977
Yerington 09:09:09 -52.2 Dark Up 50.4 102.6 Up 08:54:09 - 09:24:09 -3989
Hawthorne 09:09:07 -52.4 Dark Up 50.9 102.4 Up 08:54:07 - 09:24:07 -4048
Lee Vining 09:09:14 -53.0 Dark Up 50.6 101.4 Up 08:54:14 - 09:24:14 -4087
Tonopah 09:09:01 -52.0 Dark Up 52.1 103.0 Up 08:54:01 - 09:24:01 -4132
Bishop 09:09:13 -53.2 Dark Up 51.3 101.3 Up 08:54:13 - 09:24:13 -4165
Niwot 09:07:25 -44.1 Dark Up 59.8 117.9 Up 08:52:25 - 09:22:25 -4245
SwRI 09:07:25 -44.2 Dark Up 59.8 117.6 Up 08:52:25 - 09:22:25 -4253
Beatty 09:09:03 -52.7 Dark Up 52.7 102.0 Up 08:54:03 - 09:24:03 -4257
CPSLO 09:09:39 -55.8 Dark Up 49.9 97.2 Up 08:54:39 - 09:24:39 -4296
Indian Springs 09:08:59 -52.4 Dark Up 53.6 102.4 Up 08:53:59 - 09:23:59 -4319
Henderson 09:08:55 -52.4 Dark Up 54.2 102.3 Up 08:53:55 - 09:23:55 -4391
Searchlight/Boulder City 09:09:01 -52.7 Dark Up 54.4 101.5 Up 08:54:01 - 09:24:01 -4449
Wildwood 09:09:32 -55.7 Dark Up 51.7 97.1 Up 08:54:32 - 09:24:32 -4476
Patrick 09:08:51 -52.2 Dark Up 55.2 102.3 Up 08:53:51 - 09:23:51 -4484
Laughlin/Bullhead City 09:08:58 -52.7 Dark Up 54.7 101.4 Up 08:53:58 - 09:23:58 -4488
Kingman/Dolan Springs 09:08:54 -52.4 Dark Up 55.1 101.8 Up 08:53:54 - 09:23:54 -4500
Mohave Valley 09:08:59 -52.9 Dark Up 54.8 101.0 Up 08:53:59 - 09:23:59 -4515
DCO 09:08:49 -52.0 Dark Up 55.8 102.5 Up 08:53:49 - 09:23:49 -4534
Lake Havasu City 09:08:59 -53.1 Dark Up 55.1 100.7 Up 08:53:59 - 09:23:59 -4562
Idyllwild 09:09:20 -54.9 Dark Up 53.3 97.9 Up 08:54:20 - 09:24:20 -4567
Parker 09:09:02 -53.3 Dark Up 55.2 100.2 Up 08:54:02 - 09:24:02 -4598
Blythe 09:09:06 -53.8 Dark Up 55.0 99.3 Up 08:54:06 - 09:24:06 -4641
Calipatria 09:09:17 -54.7 Dark Up 54.4 97.9 Up 08:54:17 - 09:24:17 -4663
George/Scottsdale 09:08:47 -52.1 Dark Up 57.2 101.5 Up 08:53:47 - 09:23:47 -4709
Yuma 09:09:09 -54.4 Dark Up 55.1 97.9 Up 08:54:09 - 09:24:09 -4732

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 69987, (2020/10/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 10.83  30
Alnath         05:26:17.5 +28:36:23  1.6  6.94  17
108 Tau        05:15:27.6 +22:17:05  6.2  0.16  19
PPM 094196     05:14:45.8 +22:14:30 10.6  0.14  20
69987          05:15:09.7 +22:08:22 15.2        19
Positions are for J2000

Event circumstances last updated at 2020/07/30 22:28:24 UT

Marc W. Buie, Southwest Research Institute

RECON