RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1280:01542791 with event index number of 239981

Geocentric closest approach at 2020/01/10 10:12:55 UTC

J2000 position of star is 04:42:15.5 +39:35:00
Equinox of date position of star is 04:43:32.8 +39:37:05
Stellar brightness G=13.3, use SENSEUP=32
Star is 34 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 16.3 AU from the Sun and 15.5 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 58 seconds.
The 1-sigma cross-track error in the shadow position is 1009 km.
The sky-plane scale is 11228.6 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.7 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2020/01/10 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.3 +16:32:53  0.8 23.12  35
3Iot Aur       04:58:18.1 +33:11:45  2.7  7.07  30
PPM 047304     04:45:36.5 +40:49:20  6.0  1.26  34
PPM 069614     04:45:55.8 +39:54:40  8.5  0.53  34
PPM 069583     04:42:33.6 +39:37:23 10.0  0.21  34
248835         04:43:38.0 +39:37:13 13.3        34
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 23.1 km RECON observability=1.0 and success probability=43.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 10:08:58 -53.0 Dark Up 40.0 287.1 Up 10:03:39 - 10:14:16 886
Penticton 10:08:57 -53.3 Dark Up 40.0 287.3 Up 10:03:39 - 10:14:16 844
Okanagan Falls 10:08:57 -53.4 Dark Up 40.0 287.4 Up 10:03:39 - 10:14:16 823
Southern Okanagan 10:08:57 -53.5 Dark Up 39.9 287.6 Up 10:03:39 - 10:14:16 806
Oroville 10:08:56 -53.6 Dark Up 39.8 287.9 Up 10:03:38 - 10:14:15 783
Tonasket 10:08:56 -53.7 Dark Up 39.7 288.0 Up 10:03:38 - 10:14:15 758
Okanogan 10:08:56 -54.0 Dark Up 39.7 288.2 Up 10:03:38 - 10:14:15 719
Brewster 10:08:56 -54.3 Dark Up 39.7 288.3 Up 10:03:38 - 10:14:15 686
Manson/Chelan 10:08:57 -54.6 Dark Up 39.9 288.3 Up 10:03:38 - 10:14:15 655
Entiat 10:08:57 -54.8 Dark Up 39.9 288.4 Up 10:03:38 - 10:14:15 631
Wenatchee 10:08:57 -55.0 Dark Up 39.9 288.6 Up 10:03:38 - 10:14:15 601
Ellensburg 10:08:57 -55.3 Dark Up 39.9 288.8 Up 10:03:39 - 10:14:16 552
Yakima 10:08:57 -55.6 Dark Up 39.8 289.1 Up 10:03:38 - 10:14:15 509
Pasco 10:08:53 -54.9 Dark Up 38.7 290.1 Up 10:03:34 - 10:14:11 507
Toppenish/White Swan 10:08:56 -55.6 Dark Up 39.6 289.3 Up 10:03:37 - 10:14:14 490
PNWRO 10:08:52 -54.9 Dark Up 38.5 290.4 Up 10:03:34 - 10:14:11 487
George/Umatilla 10:08:53 -55.2 Dark Up 38.7 290.2 Up 10:03:35 - 10:14:12 467
Goldendale 10:08:56 -56.2 Dark Up 39.7 289.5 Up 10:03:38 - 10:14:15 422
The Dalles 10:08:57 -56.5 Dark Up 39.8 289.5 Up 10:03:39 - 10:14:16 389
Maupin 10:08:57 -56.7 Dark Up 39.6 289.9 Up 10:03:38 - 10:14:15 347
Niwot 10:08:19 -47.9 Dark Up 27.0 300.4 Low 10:03:00 - 10:13:37 334
Madras/Culver 10:08:56 -57.0 Dark Up 39.5 290.3 Up 10:03:38 - 10:14:15 288
Redmond 10:08:56 -57.2 Dark Up 39.4 290.6 Up 10:03:38 - 10:14:15 249
Sisters 10:08:57 -57.4 Dark Up 39.7 290.3 Up 10:03:39 - 10:14:16 242
Bend 10:08:56 -57.4 Dark Up 39.4 290.7 Up 10:03:38 - 10:14:15 223
Oregon Observatory 10:08:57 -57.6 Dark Up 39.4 290.7 Up 10:03:38 - 10:14:15 202
La Pine/Gilchrist 10:08:57 -57.7 Dark Up 39.4 290.9 Up 10:03:38 - 10:14:15 179
North Lake 10:08:55 -57.6 Dark Up 38.8 291.5 Up 10:03:37 - 10:14:14 147
Paisley 10:08:54 -57.7 Dark Up 38.4 292.0 Up 10:03:35 - 10:14:12 97
Chiloquin 10:08:57 -58.6 Dark Up 39.2 291.5 Up 10:03:38 - 10:14:15 52
Lakeview 10:08:53 -57.8 Dark Up 38.1 292.5 Up 10:03:34 - 10:14:11 48
Klamath Falls 10:08:56 -58.7 Dark Up 39.0 291.8 Up 10:03:38 - 10:14:15 18
Tulelake 10:08:56 -58.6 Dark Up 38.7 292.2 Up 10:03:37 - 10:14:14 -4
Cedarville 10:08:52 -58.0 Dark Up 37.7 293.0 Up 10:03:33 - 10:14:10 -16
Fall River/Burney 10:08:55 -59.0 Dark Up 38.3 292.9 Up 10:03:37 - 10:14:14 -97
Susanville 10:08:53 -58.8 Dark Up 37.6 293.6 Up 10:03:34 - 10:14:11 -145
Gimple 10:08:53 -59.1 Dark Up 37.6 293.7 Up 10:03:35 - 10:14:12 -180
Greenville 10:08:53 -59.2 Dark Up 37.7 293.7 Up 10:03:35 - 10:14:12 -182
Quincy 10:08:53 -59.3 Dark Up 37.6 293.8 Up 10:03:35 - 10:14:12 -203
Portola 10:08:52 -59.0 Dark Up 37.2 294.1 Up 10:03:33 - 10:14:10 -204
Reno 10:08:50 -58.7 Dark Up 36.6 294.6 Up 10:03:32 - 10:14:09 -215
Carson City 10:08:50 -58.8 Dark Up 36.5 294.8 Up 10:03:31 - 10:14:08 -252
Yerington 10:08:48 -58.4 Dark Up 36.0 295.2 Up 10:03:30 - 10:14:07 -255
Gardnerville 10:08:50 -58.9 Dark Up 36.3 295.0 Up 10:03:31 - 10:14:08 -276
Hawthorne 10:08:47 -58.2 Dark Up 35.4 295.7 Up 10:03:28 - 10:14:05 -289
Tonopah 10:08:43 -57.4 Dark Up 34.2 296.5 Up 10:03:25 - 10:14:02 -296
Lee Vining 10:08:48 -58.8 Dark Up 35.5 295.9 Up 10:03:30 - 10:14:07 -361
Indian Springs 10:08:39 -56.7 Dark Up 32.4 297.9 Up 10:03:20 - 10:13:57 -401
Beatty 10:08:41 -57.4 Dark Up 33.4 297.4 Up 10:03:23 - 10:14:00 -401
Bishop 10:08:46 -58.5 Dark Up 34.7 296.5 Up 10:03:27 - 10:14:04 -402
Henderson 10:08:37 -56.3 Dark Up 31.7 298.5 Up 10:03:19 - 10:13:56 -433
Patrick 10:08:34 -55.6 Dark Up 30.6 299.2 Up 10:03:15 - 10:13:52 -459
DCO 10:08:32 -55.1 Dark Up 30.0 299.6 Low 10:03:14 - 10:13:51 -465
Lone Pine 10:08:45 -58.5 Dark Up 34.1 297.1 Up 10:03:26 - 10:14:03 -471
Kingman/Dolan Springs 10:08:34 -55.8 Dark Up 30.6 299.2 Up 10:03:16 - 10:13:53 -487
Searchlight/Boulder City 10:08:37 -56.4 Dark Up 31.4 298.8 Up 10:03:18 - 10:13:55 -489
Laughlin/Bullhead City 10:08:36 -56.2 Dark Up 31.0 299.1 Up 10:03:17 - 10:13:54 -507
Mohave Valley 10:08:36 -56.2 Dark Up 30.9 299.2 Up 10:03:17 - 10:13:54 -535
Lake Havasu City 10:08:35 -56.1 Dark Up 30.5 299.5 Up 10:03:16 - 10:13:53 -566
Parker 10:08:35 -56.2 Dark Up 30.3 299.7 Up 10:03:16 - 10:13:53 -601
Blythe 10:08:35 -56.5 Dark Up 30.2 299.9 Up 10:03:17 - 10:13:54 -664
CPSLO 10:08:52 -60.9 Dark Up 35.4 297.0 Up 10:03:33 - 10:14:10 -678
Idyllwild 10:08:41 -58.2 Dark Up 31.8 299.2 Up 10:03:23 - 10:14:00 -722
Wildwood 10:08:46 -59.6 Dark Up 33.4 298.4 Up 10:03:27 - 10:14:04 -744
Calipatria 10:08:37 -57.4 Dark Up 30.7 299.8 Up 10:03:19 - 10:13:56 -745
Yuma 10:08:35 -56.7 Dark Up 29.8 300.3 Low 10:03:17 - 10:13:54 -757

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 248835, (2020/01/10 10:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 23.12  35
3Iot Aur       04:56:59.6 +33:09:58  2.7  7.07  30
PPM 047304     04:44:13.0 +40:47:10  6.0  1.26  34
PPM 069614     04:44:33.0 +39:52:31  8.5  0.53  34
PPM 069583     04:41:11.2 +39:35:08 10.0  0.21  34
248835         04:42:15.5 +39:35:00 13.3        34
Positions are for J2000

Event circumstances last updated at 2018/10/08 19:41:08 UT

Marc W. Buie, Southwest Research Institute

RECON