RECON: TNO occultation with 15875

Event between (15875) 96TP66 and star UC4-591-018936 with event index number of 94686

Geocentric closest approach at 2017/12/13 11:58:30 UTC

J2000 position of star is 05:27:43.7 +28:00:37
Equinox of date position of star is 05:28:50.1 +28:01:25
Stellar brightness R=15.8, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 29.0 AU from the Sun and 28.0 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 1078 seconds.
The 1-sigma cross-track error in the shadow position is 1385 km.
The sky-plane scale is 20315.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 9.9 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 15875, (2017/12/13 11:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.2 +16:32:38  0.8 16.59 139
Alnath         05:27:25.7 +28:37:15  1.6  0.67 125
22 Aur         05:24:31.2 +28:57:07  6.4  1.33 126
PPM 094373     05:28:09.0 +27:37:26  8.4  0.43 126
PPM 094407     05:30:38.8 +27:51:23  9.5  0.43 125
15875          05:28:51.5 +28:01:26 15.8       125
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 0.8 sigma about the mid-time.
The median site spacing is 20.6 km RECON observability=1.0 and success probability=25.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:55:51 -36.1 Dark Up 40.1 268.1 Up 11:40:51 - 12:10:51 1544
Tonasket 11:55:51 -36.2 Dark Up 40.1 268.3 Up 11:40:51 - 12:10:51 1523
Okanogan 11:55:51 -36.3 Dark Up 40.2 268.5 Up 11:40:51 - 12:10:51 1489
Brewster 11:55:50 -36.5 Dark Up 40.4 268.6 Up 11:40:50 - 12:10:50 1459
Manson/Chelan 11:55:50 -36.7 Dark Up 40.6 268.5 Up 11:40:50 - 12:10:50 1430
Entiat 11:55:50 -36.8 Dark Up 40.7 268.6 Up 11:40:50 - 12:10:50 1408
Wenatchee 11:55:49 -36.9 Dark Up 40.8 268.8 Up 11:40:49 - 12:10:49 1382
Ellensburg 11:55:49 -37.1 Dark Up 40.9 269.0 Up 11:40:49 - 12:10:49 1338
Pasco 11:55:44 -36.2 Dark Up 40.0 270.6 Up 11:40:44 - 12:10:44 1310
Yakima 11:55:47 -37.1 Dark Up 40.9 269.3 Up 11:40:47 - 12:10:47 1300
PNWRO 11:55:43 -36.0 Dark Up 39.8 271.0 Up 11:40:43 - 12:10:43 1294
Toppenish/White Swan 11:55:47 -37.0 Dark Up 40.8 269.6 Up 11:40:47 - 12:10:47 1285
George/Umatilla 11:55:43 -36.3 Dark Up 40.1 270.7 Up 11:40:43 - 12:10:43 1273
Goldendale 11:55:46 -37.4 Dark Up 41.1 269.8 Up 11:40:46 - 12:10:46 1222
Niwot 11:55:08 -25.8 Dark Up 29.2 283.4 Low 11:40:08 - 12:10:08 1214
The Dalles 11:55:46 -37.6 Dark Up 41.4 269.7 Up 11:40:46 - 12:10:46 1191
Maupin 11:55:45 -37.6 Dark Up 41.3 270.1 Up 11:40:45 - 12:10:45 1155
Madras/Culver 11:55:43 -37.7 Dark Up 41.4 270.6 Up 11:40:43 - 12:10:43 1103
Redmond 11:55:43 -37.7 Dark Up 41.4 270.9 Up 11:40:43 - 12:10:43 1068
Sisters 11:55:43 -38.0 Dark Up 41.7 270.6 Up 11:40:43 - 12:10:43 1059
Bend 11:55:43 -37.8 Dark Up 41.5 271.0 Up 11:40:43 - 12:10:43 1044
Oregon Observatory 11:55:42 -37.9 Dark Up 41.6 271.0 Up 11:40:42 - 12:10:42 1024
La Pine/Gilchrist 11:55:42 -38.0 Dark Up 41.6 271.2 Up 11:40:42 - 12:10:42 1003
North Lake 11:55:40 -37.6 Dark Up 41.2 271.9 Up 11:40:40 - 12:10:40 979
Paisley 11:55:38 -37.4 Dark Up 40.9 272.7 Up 11:40:38 - 12:10:38 938
Lakeview 11:55:36 -37.2 Dark Up 40.7 273.2 Up 11:40:36 - 12:10:36 895
Chiloquin 11:55:40 -38.3 Dark Up 41.9 271.9 Up 11:40:40 - 12:10:40 887
Klamath Falls 11:55:39 -38.3 Dark Up 41.8 272.3 Up 11:40:39 - 12:10:39 856
Tulelake 11:55:38 -38.1 Dark Up 41.5 272.7 Up 11:40:38 - 12:10:38 839
Cedarville 11:55:34 -37.1 Dark Up 40.6 273.9 Up 11:40:34 - 12:10:34 838
Fall River/Burney 11:55:35 -38.0 Dark Up 41.4 273.5 Up 11:40:35 - 12:10:35 754
Susanville 11:55:32 -37.5 Dark Up 40.9 274.5 Up 11:40:32 - 12:10:32 716
Gimple 11:55:32 -37.7 Dark Up 41.0 274.7 Up 11:40:32 - 12:10:32 683
Greenville 11:55:32 -37.7 Dark Up 41.1 274.6 Up 11:40:32 - 12:10:32 681
Portola 11:55:31 -37.4 Dark Up 40.7 275.2 Up 11:40:31 - 12:10:31 664
Quincy 11:55:32 -37.7 Dark Up 41.0 274.8 Up 11:40:32 - 12:10:32 661
Reno 11:55:29 -36.9 Dark Up 40.1 275.8 Up 11:40:29 - 12:10:29 658
Yerington 11:55:26 -36.3 Dark Up 39.6 276.6 Up 11:40:26 - 12:10:26 626
Carson City 11:55:28 -36.8 Dark Up 40.1 276.1 Up 11:40:28 - 12:10:28 624
Gardnerville 11:55:27 -36.8 Dark Up 40.0 276.3 Up 11:40:27 - 12:10:27 602
Tonopah 11:55:21 -34.8 Dark Up 38.0 278.4 Up 11:40:21 - 12:10:21 600
Hawthorne 11:55:24 -35.9 Dark Up 39.1 277.2 Up 11:40:24 - 12:10:24 598
Lee Vining 11:55:24 -36.3 Dark Up 39.4 277.4 Up 11:40:24 - 12:10:24 527
Indian Springs 11:55:14 -33.5 Dark Up 36.5 280.2 Up 11:40:14 - 12:10:14 508
Beatty 11:55:17 -34.4 Dark Up 37.4 279.5 Up 11:40:17 - 12:10:17 503
Bishop 11:55:22 -35.7 Dark Up 38.8 278.3 Up 11:40:22 - 12:10:22 493
Henderson 11:55:12 -32.9 Dark Up 35.9 281.0 Up 11:40:12 - 12:10:12 481
Patrick 11:55:09 -31.9 Dark Up 34.9 281.9 Up 11:40:09 - 12:10:09 460
DCO 11:55:07 -31.3 Dark Up 34.3 282.5 Up 11:40:07 - 12:10:07 456
Kingman/Dolan Springs 11:55:09 -32.0 Dark Up 35.0 282.0 Up 11:40:09 - 12:10:09 432
Lone Pine 11:55:19 -35.4 Dark Up 38.4 279.1 Up 11:40:19 - 12:10:19 430
Searchlight/Boulder City 11:55:11 -32.8 Dark Up 35.7 281.4 Up 11:40:11 - 12:10:11 428
Laughlin/Bullhead City 11:55:10 -32.4 Dark Up 35.4 281.8 Up 11:40:10 - 12:10:10 411
Mohave Valley 11:55:09 -32.4 Dark Up 35.4 282.0 Up 11:40:09 - 12:10:09 385
Lake Havasu City 11:55:08 -32.2 Dark Up 35.1 282.3 Up 11:40:08 - 12:10:08 355
Parker 11:55:07 -32.1 Dark Up 35.0 282.6 Up 11:40:07 - 12:10:07 322
Blythe 11:55:07 -32.3 Dark Up 35.1 282.8 Up 11:40:07 - 12:10:07 260
CPSLO 11:55:22 -37.4 Dark Up 40.3 278.9 Up 11:40:22 - 12:10:22 215
Idyllwild 11:55:11 -34.0 Dark Up 36.8 281.8 Up 11:40:11 - 12:10:11 195
Calipatria 11:55:07 -33.0 Dark Up 35.8 282.8 Up 11:40:07 - 12:10:07 178
Yuma 11:55:05 -32.2 Dark Up 34.9 283.4 Up 11:40:05 - 12:10:05 168
Wildwood 11:55:15 -35.6 Dark Up 38.4 280.8 Up 11:40:15 - 12:10:15 165

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 15875, (2017/12/13 11:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 16.59 139
Alnath         05:26:17.5 +28:36:24  1.6  0.67 125
22 Aur         05:23:22.9 +28:56:10  6.4  1.33 126
PPM 094373     05:27:01.4 +27:36:35  8.4  0.43 126
PPM 094407     05:29:31.0 +27:50:36  9.5  0.43 125
15875          05:27:43.7 +28:00:37 15.8       125
Positions are for J2000

Event circumstances last updated at 2017/07/29 16:12:22 UT

Marc W. Buie, Southwest Research Institute

RECON