RECON: TNO occultation with 24952

Event between (24952) 97QJ4 and star UC4-585-004621 with event index number of 311052

Geocentric closest approach at 2018/11/21 03:24:32 UTC

J2000 position of star is 02:02:37.8 +26:53:57
Equinox of date position of star is 02:03:42.1 +26:59:20
Stellar brightness R=16.4, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 31.2 AU from the Sun and 30.3 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 270 seconds.
The 1-sigma cross-track error in the shadow position is 4296 km.
The sky-plane scale is 21961.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 8.1 sec chord
Diameter=74.3 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 24952, (2018/11/21 03:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.4 +16:32:45  0.8 36.93  38
Hamal          02:08:14.5 +23:33:03  2.0  3.59  16
10 Ari         02:04:44.0 +26:01:33  6.1  0.99  19
PPM 091319     02:04:37.8 +27:34:20  8.4  0.62  20
PPM 091323     02:04:45.8 +27:10:30  8.6  0.30  20
24952          02:03:42.5 +26:59:22 16.4        20
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 3.3 sigma about the mid-time.
The median site spacing is 15.8 km RECON observability=1.0 and success probability=9.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 03:25:24 -31.4 Dark Up 52.7 113.5 Up 03:10:24 - 03:40:24 976
Penticton 03:25:26 -31.3 Dark Up 52.7 112.9 Up 03:10:26 - 03:40:26 960
Okanagan Falls 03:25:27 -31.3 Dark Up 52.8 112.6 Up 03:10:27 - 03:40:27 949
Southern Okanagan 03:25:28 -31.4 Dark Up 52.8 112.4 Up 03:10:28 - 03:40:28 937
Oroville 03:25:28 -31.5 Dark Up 53.0 112.3 Up 03:10:28 - 03:40:28 916
Tonasket 03:25:29 -31.5 Dark Up 53.1 112.0 Up 03:10:29 - 03:40:29 901
Okanogan 03:25:31 -31.4 Dark Up 53.1 111.4 Up 03:10:31 - 03:40:31 885
Manson/Chelan 03:25:34 -31.1 Dark Up 53.0 110.2 Up 03:10:34 - 03:40:34 878
Brewster 03:25:32 -31.3 Dark Up 53.1 110.9 Up 03:10:32 - 03:40:32 876
Entiat 03:25:35 -31.1 Dark Up 53.0 109.9 Up 03:10:35 - 03:40:35 867
Wenatchee 03:25:36 -31.0 Dark Up 53.0 109.5 Up 03:10:36 - 03:40:36 854
Ellensburg 03:25:38 -30.9 Dark Up 53.0 108.7 Up 03:10:38 - 03:40:38 837
Yakima 03:25:39 -30.9 Dark Up 53.1 108.2 Up 03:10:39 - 03:40:39 810
Toppenish/White Swan 03:25:40 -31.1 Dark Up 53.3 108.1 Up 03:10:40 - 03:40:40 788
The Dalles 03:25:40 -30.6 Dark Up 53.0 106.3 Up 03:10:40 - 03:40:40 778
Goldendale 03:25:40 -30.8 Dark Up 53.2 107.0 Up 03:10:40 - 03:40:40 773
Maupin 03:25:40 -30.6 Dark Up 53.2 105.9 Up 03:10:40 - 03:40:40 750
Sisters 03:25:40 -30.3 Dark Up 53.1 104.3 Up 03:10:40 - 03:40:40 737
Madras/Culver 03:25:40 -30.6 Dark Up 53.3 105.1 Up 03:10:40 - 03:40:40 725
Pasco 03:25:38 -32.0 Dark Up 54.2 109.2 Up 03:10:38 - 03:40:38 723
Oregon Observatory 03:25:40 -30.4 Dark Up 53.3 103.9 Up 03:10:40 - 03:40:40 715
Redmond 03:25:40 -30.6 Dark Up 53.4 104.6 Up 03:10:40 - 03:40:40 713
Bend 03:25:40 -30.5 Dark Up 53.3 104.2 Up 03:10:40 - 03:40:40 713
La Pine/Gilchrist 03:25:40 -30.4 Dark Up 53.3 103.6 Up 03:10:40 - 03:40:40 712
Chiloquin 03:25:40 -30.1 Dark Up 53.3 101.8 Up 03:10:40 - 03:40:40 711
George/Umatilla 03:25:40 -31.8 Dark Up 54.2 108.6 Up 03:10:40 - 03:40:40 710
Klamath Falls 03:25:40 -30.2 Dark Up 53.4 101.4 Up 03:10:40 - 03:40:40 702
PNWRO 03:25:39 -32.1 Dark Up 54.4 109.2 Up 03:10:39 - 03:40:39 696
North Lake 03:25:40 -30.8 Dark Up 53.8 103.5 Up 03:10:40 - 03:40:40 662
Paisley 03:25:40 -31.1 Dark Up 54.2 103.1 Up 03:10:40 - 03:40:40 627
Lakeview 03:25:40 -31.2 Dark Up 54.5 102.6 Up 03:10:40 - 03:40:40 607
Cedarville 03:25:40 -31.4 Dark Up 54.7 101.9 Up 03:10:40 - 03:40:40 592
Tulelake 03:25:59 -30.5 Dark Up 53.7 101.4 Up 03:10:59 - 03:40:59 533
Fall River/Burney 03:26:02 -30.5 Dark Up 54.0 100.2 Up 03:11:02 - 03:41:02 464
Susanville 03:26:03 -31.1 Dark Up 54.7 100.0 Up 03:11:03 - 03:41:03 382
Greenville 03:26:04 -30.9 Dark Up 54.5 99.4 Up 03:11:04 - 03:41:04 377
Gimple 03:26:04 -30.9 Dark Up 54.5 99.4 Up 03:11:04 - 03:41:04 372
Quincy 03:26:05 -30.9 Dark Up 54.5 99.1 Up 03:11:05 - 03:41:05 362
Portola 03:26:05 -31.2 Dark Up 54.9 99.3 Up 03:11:05 - 03:41:05 329
Reno 03:26:04 -31.7 Dark Up 55.4 99.5 Up 03:11:04 - 03:41:04 277
Carson City 03:26:05 -31.8 Dark Up 55.5 99.0 Up 03:11:05 - 03:41:05 249
Gardnerville 03:26:06 -31.8 Dark Up 55.6 98.7 Up 03:11:06 - 03:41:06 228
Yerington 03:26:05 -32.2 Dark Up 56.0 99.2 Up 03:11:05 - 03:41:05 203
Hawthorne 03:26:05 -32.7 Dark Up 56.5 98.9 Up 03:11:05 - 03:41:05 141
Lee Vining 03:26:08 -32.3 Dark Up 56.2 97.7 Up 03:11:08 - 03:41:08 123
Bishop 03:26:09 -32.8 Dark Up 56.9 97.4 Up 03:11:09 - 03:41:09 40
Tonopah 03:26:04 -33.8 Dark Up 57.7 99.4 Up 03:11:04 - 03:41:04 34
CPSLO 03:26:21 -31.0 Dark Up 55.3 92.8 Up 03:11:21 - 03:41:21 -5
Lone Pine 03:26:11 -33.1 Dark Up 57.2 96.5 Up 03:11:11 - 03:41:11 -36
Beatty 03:26:06 -34.1 Dark Up 58.2 97.9 Up 03:11:06 - 03:41:06 -80
Indian Springs 03:26:05 -35.0 Dark Up 59.1 98.2 Up 03:11:05 - 03:41:05 -161
Wildwood 03:26:21 -32.6 Dark Up 57.0 92.3 Up 03:11:21 - 03:41:21 -206
Henderson 03:26:05 -35.6 Dark Up 59.7 97.9 Up 03:11:05 - 03:41:05 -239
Searchlight/Boulder City 03:26:07 -35.6 Dark Up 59.9 96.9 Up 03:11:07 - 03:41:07 -289
Laughlin/Bullhead City 03:26:07 -35.9 Dark Up 60.2 96.7 Up 03:11:07 - 03:41:07 -331
Idyllwild 03:26:17 -34.1 Dark Up 58.6 92.8 Up 03:11:17 - 03:41:17 -335
Patrick 03:26:04 -36.5 Dark Up 60.7 97.6 Up 03:11:04 - 03:41:04 -347
Mohave Valley 03:26:08 -35.9 Dark Up 60.2 96.2 Up 03:11:08 - 03:41:08 -353
Kingman/Dolan Springs 03:26:05 -36.3 Dark Up 60.6 97.1 Up 03:11:05 - 03:41:05 -356
Niwot 03:25:25 -42.8 Dark Up 65.9 115.7 Up 03:10:25 - 03:40:25 -383
Lake Havasu City 03:26:08 -36.1 Dark Up 60.5 95.7 Up 03:11:08 - 03:41:08 -399
DCO 03:26:03 -37.0 Dark Up 61.3 97.6 Up 03:11:03 - 03:41:03 -409
Parker 03:26:09 -36.1 Dark Up 60.5 95.1 Up 03:11:09 - 03:41:09 -429
Calipatria 03:26:16 -35.1 Dark Up 59.6 92.6 Up 03:11:16 - 03:41:16 -448
Blythe 03:26:12 -35.9 Dark Up 60.3 94.0 Up 03:11:12 - 03:41:12 -457
Yuma 03:26:15 -35.8 Dark Up 60.4 92.4 Up 03:11:15 - 03:41:15 -532

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 24952, (2018/11/21 03:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 36.93  38
Hamal          02:07:10.7 +23:27:42  2.0  3.59  16
10 Ari         02:03:39.6 +25:56:09  6.1  0.99  19
PPM 091319     02:03:33.0 +27:28:55  8.4  0.62  20
PPM 091323     02:03:41.0 +27:05:06  8.6  0.30  20
24952          02:02:37.8 +26:53:57 16.4        19
Positions are for J2000

Event circumstances last updated at 2018/10/11 06:10:25 UT

Marc W. Buie, Southwest Research Institute

RECON