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 07:38:06 UTC

J2000 position of star is 07:01:22.1 +16:40:16
Equinox of date position of star is 07:02:24.2 +16:38:40
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 957 seconds.
The 1-sigma cross-track error in the shadow position is 1257 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 0.9 sigma about the mid-time.
The median site spacing is 15.4 km RECON observability=1.0 and success probability=27.1%
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 1533
Tonasket 07:43:34 -56.4 Dark Down 28.0 96.5 Low 07:28:34 - 07:58:34 1518
Okanogan 07:43:39 -56.7 Dark Down 27.9 96.2 Low 07:28:39 - 07:58:39 1500
Brewster 07:43:42 -57.0 Dark Down 27.8 95.9 Low 07:28:42 - 07:58:42 1487
Manson/Chelan 07:43:44 -57.2 Dark Down 27.6 95.5 Low 07:28:44 - 07:58:44 1482
Entiat 07:43:46 -57.4 Dark Down 27.6 95.3 Low 07:28:46 - 07:58:46 1469
Wenatchee 07:43:49 -57.7 Dark Down 27.6 95.1 Low 07:28:49 - 07:58:49 1455
Ellensburg 07:43:53 -58.1 Dark Down 27.4 94.8 Low 07:28:53 - 07:58:53 1433
Yakima 07:43:57 -58.5 Dark Down 27.5 94.5 Low 07:28:57 - 07:58:57 1406
Toppenish/White Swan 07:43:59 -58.7 Dark Down 27.6 94.6 Low 07:28:59 - 07:58:59 1387
Goldendale 07:44:06 -59.2 Dark Down 27.4 94.0 Low 07:29:06 - 07:59:06 1360
The Dalles 07:44:08 -59.5 Dark Down 27.2 93.6 Low 07:29:08 - 07:59:08 1354
Pasco 07:43:57 -58.8 Dark Down 28.5 95.5 Low 07:28:57 - 07:58:57 1346
George/Umatilla 07:44:00 -59.1 Dark Down 28.4 95.1 Low 07:29:00 - 07:59:00 1329
PNWRO 07:43:58 -59.1 Dark Down 28.7 95.5 Low 07:28:58 - 07:58:58 1323
Maupin 07:44:12 -59.9 Dark Down 27.3 93.5 Low 07:29:12 - 07:59:12 1322
Madras/Culver 07:44:17 -60.4 Dark Down 27.3 93.2 Low 07:29:17 - 07:59:17 1285
Sisters 07:44:22 -60.8 Dark Down 27.0 92.7 Low 07:29:22 - 07:59:22 1273
Redmond 07:44:21 -60.8 Dark Down 27.3 93.0 Low 07:29:21 - 07:59:21 1261
Bend 07:44:23 -61.0 Dark Down 27.2 92.8 Low 07:29:23 - 07:59:23 1250
Oregon Observatory 07:44:26 -61.2 Dark Down 27.1 92.6 Low 07:29:26 - 07:59:26 1241
La Pine/Gilchrist 07:44:27 -61.4 Dark Down 27.1 92.5 Low 07:29:27 - 07:59:27 1228
North Lake 07:44:29 -61.8 Dark Down 27.5 92.7 Low 07:29:29 - 07:59:29 1181
Chiloquin 07:44:38 -62.5 Dark Down 26.9 91.7 Low 07:29:38 - 07:59:38 1157
Paisley 07:44:33 -62.4 Dark Down 27.8 92.6 Low 07:29:33 - 07:59:33 1131
Klamath Falls 07:44:41 -62.8 Dark Down 27.0 91.6 Low 07:29:41 - 07:59:41 1130
Tulelake 07:44:42 -63.1 Dark Down 27.2 91.6 Low 07:29:42 - 07:59:42 1102
Lakeview 07:44:38 -62.9 Dark Down 28.0 92.5 Low 07:29:38 - 07:59:38 1088
Cedarville 07:44:43 -63.5 Dark Down 28.2 92.3 Low 07:29:43 - 07:59:43 1035
Fall River/Burney 07:44:50 -64.0 Dark Down 27.3 91.2 Low 07:29:50 - 07:59:50 1032
Susanville 07:44:53 -64.7 Dark Down 27.9 91.4 Low 07:29:53 - 07:59:53 964
Greenville 07:44:56 -64.9 Dark Down 27.7 91.1 Low 07:29:56 - 07:59:56 952
Gimple 07:44:56 -64.9 Dark Down 27.8 91.1 Low 07:29:56 - 07:59:56 949
Quincy 07:44:58 -65.1 Dark Down 27.7 91.0 Low 07:29:58 - 07:59:58 936
Portola 07:44:58 -65.3 Dark Down 28.1 91.2 Low 07:29:58 - 07:59:58 913
Reno 07:44:58 -65.5 Dark Down 28.6 91.5 Low 07:29:58 - 07:59:58 874
Carson City 07:45:02 -65.9 Dark Down 28.6 91.3 Low 07:30:02 - 08:00:02 846
Gardnerville 07:45:03 -66.1 Dark Down 28.7 91.2 Low 07:30:03 - 08:00:03 825
Yerington 07:45:01 -66.1 Dark Down 29.1 91.6 Low 07:30:01 - 08:00:01 812
Hawthorne 07:45:03 -66.5 Dark Down 29.6 91.7 Low 07:30:03 - 08:00:03 761
Lee Vining 07:45:09 -67.1 Dark Down 29.2 91.1 Low 07:30:09 - 08:00:09 730
Tonopah 07:45:02 -66.8 Dark Down 30.7 92.3 Up 07:30:02 - 08:00:02 683
Bishop 07:45:12 -67.6 Dark Down 29.8 91.2 Low 07:30:12 - 08:00:12 661
Lone Pine 07:45:17 -68.4 Dark Down 30.1 91.0 Up 07:30:17 - 08:00:17 589
Beatty 07:45:10 -67.9 Dark Down 31.1 92.0 Up 07:30:10 - 08:00:10 575
CPSLO 07:45:35 -69.8 Dark Down 28.1 88.8 Low 07:30:35 - 08:00:35 560
Indian Springs 07:45:08 -68.1 Dark Down 32.0 92.4 Up 07:30:08 - 08:00:08 517
Niwot 07:43:53 -61.8 Dark Down 39.5 102.0 Up 07:28:53 - 07:58:53 505
Henderson 07:45:09 -68.5 Dark Down 32.6 92.5 Up 07:30:09 - 08:00:09 452
Searchlight/Boulder City 07:45:13 -69.0 Dark Down 32.7 92.2 Up 07:30:13 - 08:00:13 402
Wildwood 07:45:38 -70.9 Dark Down 29.7 89.3 Low 07:30:38 - 08:00:38 397
Laughlin/Bullhead City 07:45:14 -69.2 Dark Down 33.0 92.2 Up 07:30:14 - 08:00:14 366
Patrick 07:45:10 -68.8 Dark Down 33.5 92.8 Up 07:30:10 - 08:00:10 366
Kingman/Dolan Springs 07:45:12 -69.1 Dark Down 33.4 92.5 Up 07:30:12 - 08:00:12 353
Mohave Valley 07:45:17 -69.5 Dark Down 33.0 92.0 Up 07:30:17 - 08:00:17 343
DCO 07:45:09 -68.9 Dark Down 34.1 93.0 Up 07:30:09 - 08:00:09 318
Idyllwild 07:45:34 -71.0 Dark Down 31.3 90.1 Up 07:30:34 - 08:00:34 309
Lake Havasu City 07:45:18 -69.8 Dark Down 33.2 91.9 Up 07:30:18 - 08:00:18 301
Parker 07:45:21 -70.1 Dark Down 33.2 91.7 Up 07:30:21 - 08:00:21 270
Blythe 07:45:26 -70.7 Dark Down 33.0 91.2 Up 07:30:26 - 08:00:26 234
Calipatria 07:45:34 -71.4 Dark Down 32.3 90.4 Up 07:30:34 - 08:00:34 221
Yuma 07:45:33 -71.6 Dark Down 33.0 90.6 Up 07:30:33 - 08:00:33 156

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 2017/12/05 19:02:09 UT

Marc W. Buie, Southwest Research Institute

RECON