RECON: TNO occultation with 69987

Event between (69987) 98WA25 and star GA1120:01318576 with event index number of 1395992

Geocentric closest approach at 2024/11/07 10:39:57 UTC

J2000 position of star is 05:36:30.6 +22:28:53
Equinox of date position of star is 05:37:41.1 +22:29:32
Stellar brightness G=15.4, use SENSEUP=128
Star is 151 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 42.5 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 18.9 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 947 seconds.
The 1-sigma cross-track error in the shadow position is 3273 km.
The sky-plane scale is 30293.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 12.1 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 69987, (2024/11/07 10:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.0 +16:33:27  0.8 15.47 135
Alnath         05:27:51.9 +28:37:35  1.6  6.54 149
PPM 094621     05:40:56.8 +21:46:29  6.4  0.99 151
PPM 094553     05:37:56.0 +22:00:22  7.5  0.49 151
PPM 094543     05:37:31.0 +22:27:24  9.9  0.12 151
69987          05:38:00.7 +22:29:43 15.4       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 1.0 sigma about the mid-time.
The median site spacing is 22.4 km RECON observability=1.0 and success probability=8.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:39:37 -41.1 Dark Down 62.4 187.0 Up 10:24:37 - 10:54:37 -4149
Summerland 10:39:38 -41.4 Dark Down 62.8 186.5 Up 10:24:38 - 10:54:38 -4177
Penticton 10:39:38 -41.3 Dark Down 62.8 186.8 Up 10:24:38 - 10:54:38 -4184
Okanagan Falls 10:39:38 -41.4 Dark Down 63.0 186.8 Up 10:24:38 - 10:54:38 -4203
Oliver 10:39:38 -41.5 Dark Down 63.2 186.9 Up 10:24:38 - 10:54:38 -4219
Anarchist Mountain Observatory 10:39:38 -41.4 Dark Down 63.3 187.3 Up 10:24:38 - 10:54:38 -4237
Oroville 10:39:37 -41.5 Dark Down 63.4 187.2 Up 10:24:37 - 10:54:37 -4244
Tonasket 10:39:38 -41.6 Dark Down 63.6 187.2 Up 10:24:38 - 10:54:38 -4267
Okanogan 10:39:38 -41.9 Dark Down 64.0 187.0 Up 10:24:38 - 10:54:38 -4301
Brewster 10:39:39 -42.1 Dark Down 64.3 186.7 Up 10:24:39 - 10:54:39 -4327
Manson/Chelan 10:39:40 -42.4 Dark Down 64.5 185.9 Up 10:24:40 - 10:54:40 -4347
Entiat 10:39:41 -42.5 Dark Down 64.7 185.8 Up 10:24:41 - 10:54:41 -4369
Wenatchee 10:39:41 -42.7 Dark Down 65.0 185.7 Up 10:24:41 - 10:54:41 -4395
Ellensburg 10:39:42 -43.0 Dark Down 65.4 185.3 Up 10:24:42 - 10:54:42 -4436
Yakima 10:39:42 -43.2 Dark Down 65.8 185.3 Up 10:24:42 - 10:54:42 -4477
Toppenish/White Swan 10:39:42 -43.2 Dark Down 66.0 185.8 Up 10:24:42 - 10:54:42 -4500
Pasco 10:39:36 -42.5 Dark Down 66.0 188.6 Up 10:24:36 - 10:54:36 -4515
PNWRO 10:39:35 -42.4 Dark Down 66.3 189.2 Up 10:24:35 - 10:54:35 -4541
George/Umatilla 10:39:37 -42.7 Dark Down 66.4 188.2 Up 10:24:37 - 10:54:37 -4549
Goldendale 10:39:44 -43.7 Dark Down 66.6 184.9 Up 10:24:44 - 10:54:44 -4555
The Dalles 10:39:45 -44.0 Dark Down 66.8 184.1 Up 10:24:45 - 10:54:45 -4577
Maupin 10:39:44 -44.1 Dark Down 67.3 184.4 Up 10:24:44 - 10:54:44 -4620
Madras/Culver 10:39:45 -44.4 Dark Down 67.8 184.4 Up 10:24:45 - 10:54:45 -4676
Sisters 10:39:46 -44.8 Dark Down 68.2 183.4 Up 10:24:46 - 10:54:46 -4709
Redmond 10:39:45 -44.6 Dark Down 68.2 184.4 Up 10:24:45 - 10:54:45 -4712
Bend 10:39:46 -44.7 Dark Down 68.4 184.1 Up 10:24:46 - 10:54:46 -4734
Oregon Observatory 10:39:46 -44.9 Dark Down 68.6 183.8 Up 10:24:46 - 10:54:46 -4752
La Pine/Gilchrist 10:39:46 -45.0 Dark Down 68.8 183.7 Up 10:24:46 - 10:54:46 -4773
North Lake 10:39:44 -44.8 Dark Down 69.2 185.3 Up 10:24:44 - 10:54:44 -4820
Paisley 10:39:42 -44.7 Dark Down 69.7 186.4 Up 10:24:42 - 10:54:42 -4878
Chiloquin 10:39:48 -45.7 Dark Down 69.9 182.9 Up 10:24:48 - 10:54:48 -4887
Klamath Falls 10:39:48 -45.8 Dark Down 70.2 183.2 Up 10:24:48 - 10:54:48 -4923
Lakeview 10:39:41 -44.8 Dark Down 70.2 187.0 Up 10:24:41 - 10:54:41 -4932
Tulelake 10:39:46 -45.7 Dark Down 70.5 184.1 Up 10:24:46 - 10:54:46 -4952
Cedarville 10:39:41 -44.9 Dark Down 70.8 187.7 Up 10:24:41 - 10:54:41 -5001
Fall River/Burney 10:39:47 -45.9 Dark Down 71.4 184.5 Up 10:24:47 - 10:54:47 -5048
Susanville 10:39:43 -45.6 Dark Down 72.0 186.8 Up 10:24:43 - 10:54:43 -5117
Niwot 10:38:36 -34.4 Dark Down 67.0 225.2 Up 10:23:36 - 10:53:36 -5131
SwRI 10:38:37 -34.5 Dark Down 67.1 225.2 Up 10:23:37 - 10:53:37 -5143
Greenville 10:39:44 -45.9 Dark Down 72.3 186.0 Up 10:24:44 - 10:54:44 -5145
Gimple 10:39:44 -45.9 Dark Down 72.3 186.3 Up 10:24:44 - 10:54:44 -5146
Quincy 10:39:45 -46.0 Dark Down 72.5 186.1 Up 10:24:45 - 10:54:45 -5167
Portola 10:39:42 -45.7 Dark Down 72.5 187.6 Up 10:24:42 - 10:54:42 -5181
Reno 10:39:40 -45.3 Dark Down 72.7 189.7 Up 10:24:40 - 10:54:40 -5211
Carson City 10:39:39 -45.4 Dark Down 73.1 189.9 Up 10:24:39 - 10:54:39 -5250
Yerington 10:39:37 -45.0 Dark Down 73.2 192.0 Up 10:24:37 - 10:54:37 -5272
Gardnerville 10:39:39 -45.5 Dark Down 73.3 190.2 Up 10:24:39 - 10:54:39 -5276
Hawthorne 10:39:34 -44.8 Dark Down 73.5 194.0 Up 10:24:34 - 10:54:34 -5323
Tonopah 10:39:28 -43.8 Dark Down 73.7 198.9 Up 10:24:28 - 10:54:28 -5375
Lee Vining 10:39:37 -45.3 Dark Down 74.2 192.9 Up 10:24:37 - 10:54:37 -5382
Bishop 10:39:33 -44.9 Dark Down 74.6 195.8 Up 10:24:33 - 10:54:33 -5448
Beatty 10:39:26 -43.8 Dark Down 74.6 201.8 Up 10:24:26 - 10:54:26 -5500
Lone Pine 10:39:32 -44.8 Dark Down 75.3 197.8 Up 10:24:32 - 10:54:32 -5530
Indian Springs 10:39:21 -43.0 Dark Down 74.6 205.7 Up 10:24:21 - 10:54:21 -5536
Henderson 10:39:17 -42.6 Dark Down 74.8 208.8 Up 10:24:17 - 10:54:17 -5593
Searchlight/Boulder City 10:39:18 -42.6 Dark Down 75.3 210.1 Up 10:24:18 - 10:54:18 -5656
Patrick 10:39:12 -41.8 Dark Down 74.9 213.4 Up 10:24:12 - 10:54:12 -5661
CPSLO 10:39:44 -47.1 Dark Down 77.0 189.4 Up 10:24:44 - 10:54:44 -5663
Kingman/Dolan Springs 10:39:13 -42.0 Dark Down 75.2 213.3 Up 10:24:13 - 10:54:13 -5685
Laughlin/Bullhead City 10:39:16 -42.4 Dark Down 75.4 211.7 Up 10:24:16 - 10:54:16 -5688
DCO 10:39:10 -41.3 Dark Down 74.8 216.2 Up 10:24:10 - 10:54:10 -5693
Mohave Valley 10:39:16 -42.4 Dark Down 75.6 212.3 Up 10:24:16 - 10:54:16 -5717
Lake Havasu City 10:39:15 -42.3 Dark Down 75.9 214.0 Up 10:24:15 - 10:54:15 -5761
Parker 10:39:15 -42.3 Dark Down 76.1 214.9 Up 10:24:15 - 10:54:15 -5799
Wildwood 10:39:34 -45.8 Dark Down 77.8 199.1 Up 10:24:34 - 10:54:34 -5800
Idyllwild 10:39:25 -44.4 Dark Down 77.5 207.2 Up 10:24:25 - 10:54:25 -5843
Blythe 10:39:16 -42.7 Dark Down 76.7 215.1 Up 10:24:16 - 10:54:16 -5856
Calipatria 10:39:19 -43.5 Dark Down 77.6 213.0 Up 10:24:19 - 10:54:19 -5910
Yuma 10:39:15 -42.8 Dark Down 77.5 217.4 Up 10:24:15 - 10:54:15 -5957

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, (2024/11/07 10:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 15.47 135
Alnath         05:26:17.5 +28:36:23  1.6  6.54 149
PPM 094621     05:39:27.1 +21:45:46  6.4  0.99 151
PPM 094553     05:36:26.2 +21:59:33  7.5  0.49 151
PPM 094543     05:36:01.0 +22:26:34  9.9  0.12 151
69987          05:36:30.6 +22:28:53 15.4       151
Positions are for J2000

Event circumstances last updated at 2019/06/08 09:22:47 UT

Marc W. Buie, Southwest Research Institute

RECON