RECON: TNO occultation with 29981

Event between (29981) 99TD10 and star UC4-534-036907 with event index number of 155259

Geocentric closest approach at 2018/11/03 07:38:05 UTC

J2000 position of star is 07:01:22.1 +16:40:16
Equinox of date position of star is 07:02:22.3 +16:38:43
Stellar brightness R=13.0, use SENSEUP=32
Star is 61 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 30.2 AU from the Sun and 29.7 AU from the Earth.
The TNO is moving 9.3 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 790 seconds.
The 1-sigma cross-track error in the shadow position is 1202 km.
The sky-plane scale is 21550.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 11.8 sec chord
Diameter=44.8 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 29981, (2018/11/03 07:38UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.0 +27:58:45  1.1 15.22  52
Alhena         06:38:48.0 +16:22:54  1.9  5.68  67
PPM 123373     07:01:22.8 +15:30:27  6.4  1.16  61
PPM 123427     07:03:38.5 +16:38:44  7.6  0.28  61
29981          07:02:27.3 +16:38:35 13.0        61
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 1.1 sigma about the mid-time.
The median site spacing is 15.9 km RECON observability=1.0 and success probability=28.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:43:32 -56.1 Dark Down 27.9 96.6 Low 07:28:32 - 07:58:32 1527
Tonasket 07:43:34 -56.4 Dark Down 28.0 96.5 Low 07:28:34 - 07:58:34 1511
Okanogan 07:43:38 -56.7 Dark Down 27.9 96.2 Low 07:28:38 - 07:58:38 1493
Brewster 07:43:41 -57.0 Dark Down 27.8 95.9 Low 07:28:41 - 07:58:41 1480
Manson/Chelan 07:43:43 -57.2 Dark Down 27.6 95.5 Low 07:28:43 - 07:58:43 1475
Entiat 07:43:46 -57.4 Dark Down 27.6 95.3 Low 07:28:46 - 07:58:46 1462
Wenatchee 07:43:49 -57.7 Dark Down 27.5 95.1 Low 07:28:49 - 07:58:49 1448
Ellensburg 07:43:53 -58.1 Dark Down 27.4 94.8 Low 07:28:53 - 07:58:53 1426
Yakima 07:43:56 -58.5 Dark Down 27.5 94.5 Low 07:28:56 - 07:58:56 1399
Toppenish/White Swan 07:43:58 -58.7 Dark Down 27.6 94.6 Low 07:28:58 - 07:58:58 1380
Goldendale 07:44:04 -59.2 Dark Down 27.4 94.0 Low 07:29:04 - 07:59:04 1353
The Dalles 07:44:08 -59.5 Dark Down 27.2 93.6 Low 07:29:08 - 07:59:08 1347
Pasco 07:43:56 -58.8 Dark Down 28.5 95.5 Low 07:28:56 - 07:58:56 1339
George/Umatilla 07:44:00 -59.1 Dark Down 28.4 95.1 Low 07:29:00 - 07:59:00 1322
PNWRO 07:43:57 -59.1 Dark Down 28.7 95.5 Low 07:28:57 - 07:58:57 1317
Maupin 07:44:12 -59.9 Dark Down 27.3 93.5 Low 07:29:12 - 07:59:12 1315
Madras/Culver 07:44:17 -60.4 Dark Down 27.3 93.2 Low 07:29:17 - 07:59:17 1278
Sisters 07:44:21 -60.8 Dark Down 27.0 92.7 Low 07:29:21 - 07:59:21 1266
Redmond 07:44:20 -60.8 Dark Down 27.3 93.0 Low 07:29:20 - 07:59:20 1254
Bend 07:44:22 -61.0 Dark Down 27.2 92.8 Low 07:29:22 - 07:59:22 1243
Oregon Observatory 07:44:25 -61.2 Dark Down 27.1 92.6 Low 07:29:25 - 07:59:25 1234
La Pine/Gilchrist 07:44:27 -61.4 Dark Down 27.1 92.5 Low 07:29:27 - 07:59:27 1221
North Lake 07:44:28 -61.8 Dark Down 27.5 92.7 Low 07:29:28 - 07:59:28 1174
Chiloquin 07:44:38 -62.5 Dark Down 26.9 91.7 Low 07:29:38 - 07:59:38 1150
Paisley 07:44:33 -62.4 Dark Down 27.8 92.6 Low 07:29:33 - 07:59:33 1124
Klamath Falls 07:44:41 -62.8 Dark Down 27.0 91.6 Low 07:29:41 - 07:59:41 1123
Tulelake 07:44:42 -63.1 Dark Down 27.2 91.6 Low 07:29:42 - 07:59:42 1095
Lakeview 07:44:37 -62.9 Dark Down 28.0 92.5 Low 07:29:37 - 07:59:37 1082
Cedarville 07:44:42 -63.5 Dark Down 28.2 92.3 Low 07:29:42 - 07:59:42 1028
Fall River/Burney 07:44:49 -64.0 Dark Down 27.3 91.2 Low 07:29:49 - 07:59:49 1025
Susanville 07:44:52 -64.7 Dark Down 27.9 91.4 Low 07:29:52 - 07:59:52 957
Greenville 07:44:55 -64.9 Dark Down 27.7 91.1 Low 07:29:55 - 07:59:55 944
Gimple 07:44:55 -64.9 Dark Down 27.8 91.1 Low 07:29:55 - 07:59:55 942
Quincy 07:44:57 -65.1 Dark Down 27.7 91.0 Low 07:29:57 - 07:59:57 929
Portola 07:44:56 -65.3 Dark Down 28.1 91.2 Low 07:29:56 - 07:59:56 906
Reno 07:44:57 -65.5 Dark Down 28.6 91.5 Low 07:29:57 - 07:59:57 867
Carson City 07:45:00 -65.9 Dark Down 28.6 91.3 Low 07:30:00 - 08:00:00 838
Gardnerville 07:45:02 -66.1 Dark Down 28.7 91.2 Low 07:30:02 - 08:00:02 818
Yerington 07:44:59 -66.1 Dark Down 29.1 91.6 Low 07:29:59 - 07:59:59 805
Hawthorne 07:45:02 -66.5 Dark Down 29.5 91.7 Low 07:30:02 - 08:00:02 753
Lee Vining 07:45:09 -67.1 Dark Down 29.2 91.1 Low 07:30:09 - 08:00:09 723
Tonopah 07:45:01 -66.8 Dark Down 30.7 92.3 Up 07:30:01 - 08:00:01 676
Bishop 07:45:11 -67.6 Dark Down 29.8 91.2 Low 07:30:11 - 08:00:11 653
Lone Pine 07:45:16 -68.4 Dark Down 30.1 91.0 Up 07:30:16 - 08:00:16 582
Beatty 07:45:08 -67.9 Dark Down 31.1 91.9 Up 07:30:08 - 08:00:08 568
CPSLO 07:45:35 -69.8 Dark Down 28.1 88.8 Low 07:30:35 - 08:00:35 552
Indian Springs 07:45:07 -68.1 Dark Down 32.0 92.4 Up 07:30:07 - 08:00:07 509
Niwot 07:43:52 -61.8 Dark Down 39.5 102.0 Up 07:28:52 - 07:58:52 498
Henderson 07:45:08 -68.5 Dark Down 32.6 92.5 Up 07:30:08 - 08:00:08 444
Searchlight/Boulder City 07:45:12 -69.0 Dark Down 32.7 92.2 Up 07:30:12 - 08:00:12 394
Wildwood 07:45:38 -70.9 Dark Down 29.7 89.3 Low 07:30:38 - 08:00:38 389
Laughlin/Bullhead City 07:45:13 -69.2 Dark Down 32.9 92.2 Up 07:30:13 - 08:00:13 358
Patrick 07:45:09 -68.8 Dark Down 33.5 92.8 Up 07:30:09 - 08:00:09 358
Kingman/Dolan Springs 07:45:11 -69.1 Dark Down 33.4 92.5 Up 07:30:11 - 08:00:11 345
Mohave Valley 07:45:15 -69.5 Dark Down 33.0 92.0 Up 07:30:15 - 08:00:15 335
DCO 07:45:08 -68.9 Dark Down 34.1 93.0 Up 07:30:08 - 08:00:08 310
Idyllwild 07:45:33 -71.0 Dark Down 31.3 90.1 Up 07:30:33 - 08:00:33 302
Lake Havasu City 07:45:17 -69.8 Dark Down 33.2 91.9 Up 07:30:17 - 08:00:17 293
Parker 07:45:20 -70.1 Dark Down 33.2 91.7 Up 07:30:20 - 08:00:20 262
Blythe 07:45:25 -70.7 Dark Down 33.0 91.2 Up 07:30:25 - 08:00:25 226
Calipatria 07:45:33 -71.4 Dark Down 32.3 90.4 Up 07:30:33 - 08:00:33 212
Yuma 07:45:32 -71.6 Dark Down 33.0 90.6 Up 07:30:32 - 08:00:32 147

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 29981, (2018/11/03 07:38UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 15.22  52
Alhena         06:37:42.8 +16:23:57  1.9  5.68  67
PPM 123373     07:00:18.1 +15:32:06  6.4  1.16  61
PPM 123427     07:02:33.3 +16:40:27  7.6  0.28  61
29981          07:01:22.1 +16:40:16 13.0        61
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:05:20 UT

Marc W. Buie, Southwest Research Institute

RECON