RECON: TNO occultation with 281371

Event between (281371) 08FC76 and star UC4-507-021728 with event index number of 216397

Geocentric closest approach at 2019/10/22 11:55:24 UTC

J2000 position of star is 06:15:14.5 +11:18:06
Equinox of date position of star is 06:16:15.3 +11:17:41
Stellar brightness R=14.8, use SENSEUP=128
Star is 40 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=20.3

[RECON map]
TNO is 11.7 AU from the Sun and 11.3 AU from the Earth.
The TNO is moving 10.5 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 52 seconds.
The 1-sigma cross-track error in the shadow position is 605 km.
The sky-plane scale is 8190.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 8.0 sec chord
Diameter=34.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 281371, (2019/10/22 11:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:14.7 +07:24:33  0.4  6.30  46
Alhena         06:38:51.4 +16:22:51  1.9  7.46  33
73 Ori         06:16:51.7 +12:32:35  5.4  1.26  39
PPM 122161     06:16:02.1 +11:38:41  8.0  0.36  40
PPM 122188     06:16:57.8 +11:11:34 10.0  0.18  40
281371         06:16:20.7 +11:17:38 14.8        40
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 11.3 km RECON observability=1.0 and success probability=35.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Manson/Chelan 11:50:26 -27.2 Dark Up 53.1 170.6 Up 11:45:35 - 11:55:17 -261
Entiat 11:50:28 -27.3 Dark Up 53.3 170.5 Up 11:45:37 - 11:55:19 -264
Wenatchee 11:50:30 -27.5 Dark Up 53.6 170.3 Up 11:45:39 - 11:55:21 -267
Ellensburg 11:50:34 -27.7 Dark Up 53.9 169.8 Up 11:45:43 - 11:55:25 -267
Oroville 11:50:15 -26.5 Dark Up 52.1 171.9 Up 11:45:24 - 11:55:06 -269
The Dalles 11:50:47 -28.4 Dark Up 55.2 168.5 Up 11:45:56 - 11:55:38 -276
Brewster 11:50:23 -27.0 Dark Up 52.9 171.2 Up 11:45:32 - 11:55:14 -277
Tonasket 11:50:17 -26.6 Dark Up 52.4 171.9 Up 11:45:26 - 11:55:08 -277
Okanogan 11:50:20 -26.8 Dark Up 52.7 171.6 Up 11:45:29 - 11:55:11 -280
Yakima 11:50:37 -27.8 Dark Up 54.3 169.7 Up 11:45:46 - 11:55:28 -281
Goldendale 11:50:44 -28.1 Dark Up 55.1 169.1 Up 11:45:53 - 11:55:35 -293
Sisters 11:50:59 -29.0 Dark Up 56.5 167.5 Up 11:46:08 - 11:55:50 -298
Maupin 11:50:50 -28.4 Dark Up 55.7 168.6 Up 11:45:59 - 11:55:41 -299
Toppenish/White Swan 11:50:38 -27.7 Dark Up 54.6 170.0 Up 11:45:47 - 11:55:29 -301
Madras/Culver 11:50:54 -28.6 Dark Up 56.2 168.3 Up 11:46:03 - 11:55:45 -317
Oregon Observatory 11:51:02 -29.0 Dark Up 56.9 167.6 Up 11:46:11 - 11:55:53 -322
Bend 11:51:00 -28.8 Dark Up 56.7 167.9 Up 11:46:09 - 11:55:51 -325
La Pine/Gilchrist 11:51:04 -29.1 Dark Up 57.1 167.4 Up 11:46:13 - 11:55:55 -326
Redmond 11:50:58 -28.7 Dark Up 56.5 168.2 Up 11:46:07 - 11:55:49 -327
Chiloquin 11:51:14 -29.5 Dark Up 58.1 166.5 Up 11:46:23 - 11:56:05 -343
Klamath Falls 11:51:16 -29.5 Dark Up 58.5 166.5 Up 11:46:25 - 11:56:07 -363
North Lake 11:51:05 -28.7 Dark Up 57.6 168.4 Up 11:46:14 - 11:55:56 -385
George/Umatilla 11:50:38 -27.1 Dark Up 55.1 171.6 Up 11:45:47 - 11:55:29 -389
Pasco 11:50:35 -26.9 Dark Up 54.8 172.1 Up 11:45:44 - 11:55:26 -391
Tulelake 11:51:18 -29.4 Dark Up 58.8 167.0 Up 11:46:27 - 11:56:09 -395
PNWRO 11:50:36 -26.8 Dark Up 55.1 172.4 Up 11:45:45 - 11:55:27 -416
Paisley 11:51:09 -28.6 Dark Up 58.2 168.9 Up 11:46:18 - 11:56:00 -433
Fall River/Burney 11:51:25 -29.5 Dark Up 59.7 166.8 Up 11:46:34 - 11:56:16 -437
Lakeview 11:51:12 -28.5 Dark Up 58.7 169.1 Up 11:46:21 - 11:56:03 -467
Cedarville 11:51:17 -28.5 Dark Up 59.4 169.3 Up 11:46:26 - 11:56:08 -507
Greenville 11:51:31 -29.3 Dark Up 60.6 167.4 Up 11:46:40 - 11:56:22 -507
Gimple 11:51:31 -29.2 Dark Up 60.7 167.6 Up 11:46:40 - 11:56:22 -513
Quincy 11:51:32 -29.3 Dark Up 60.8 167.4 Up 11:46:41 - 11:56:23 -516
Susanville 11:51:27 -29.0 Dark Up 60.4 168.1 Up 11:46:36 - 11:56:18 -518
Portola 11:51:31 -29.0 Dark Up 61.0 168.3 Up 11:46:40 - 11:56:22 -557
Reno 11:51:31 -28.5 Dark Up 61.4 169.5 Up 11:46:40 - 11:56:22 -617
Carson City 11:51:34 -28.6 Dark Up 61.8 169.4 Up 11:46:43 - 11:56:25 -634
Gardnerville 11:51:36 -28.6 Dark Up 62.0 169.4 Up 11:46:45 - 11:56:27 -648
Yerington 11:51:33 -28.1 Dark Up 62.0 170.7 Up 11:46:42 - 11:56:24 -690
CPSLO 11:52:10 -29.7 Dark Up 65.4 166.2 Up 11:47:19 - 11:57:01 -737
Lee Vining 11:51:42 -28.2 Dark Up 63.1 170.5 Up 11:46:51 - 11:56:33 -739
Hawthorne 11:51:35 -27.8 Dark Up 62.6 171.6 Up 11:46:44 - 11:56:26 -751
Bishop 11:51:44 -27.7 Dark Up 63.7 171.9 Up 11:46:53 - 11:56:35 -822
Tonopah 11:51:33 -26.7 Dark Up 63.1 174.5 Up 11:46:42 - 11:56:24 -880
Lone Pine 11:51:49 -27.5 Dark Up 64.5 172.5 Up 11:46:58 - 11:56:40 -883
Wildwood 11:52:12 -28.2 Dark Up 67.0 170.6 Up 11:47:21 - 11:57:03 -958
Beatty 11:51:41 -26.5 Dark Up 64.3 175.4 Up 11:46:50 - 11:56:32 -970
Indian Springs 11:51:39 -25.7 Dark Up 64.7 177.8 Up 11:46:48 - 11:56:30 -1070
Idyllwild 11:52:07 -26.7 Dark Up 67.5 175.2 Up 11:47:16 - 11:56:58 -1127
Henderson 11:51:40 -25.2 Dark Up 65.3 179.4 Up 11:46:49 - 11:56:31 -1150
Searchlight/Boulder City 11:51:45 -25.1 Dark Up 65.8 179.6 Up 11:46:54 - 11:56:36 -1184
Laughlin/Bullhead City 11:51:46 -24.9 Dark Up 66.1 180.5 Up 11:46:55 - 11:56:37 -1226
Mohave Valley 11:51:49 -24.9 Dark Up 66.4 180.5 Up 11:46:58 - 11:56:40 -1240
Calipatria 11:52:07 -25.7 Dark Up 68.2 178.2 Up 11:47:16 - 11:56:58 -1253
Kingman/Dolan Springs 11:51:43 -24.5 Dark Up 66.1 181.7 Up 11:46:52 - 11:56:34 -1266
Patrick 11:51:41 -24.3 Dark Up 65.9 182.1 Up 11:46:50 - 11:56:32 -1269
Lake Havasu City 11:51:50 -24.7 Dark Up 66.8 181.1 Up 11:46:59 - 11:56:41 -1280
Parker 11:51:53 -24.7 Dark Up 67.2 181.3 Up 11:47:02 - 11:56:44 -1301
Blythe 11:51:59 -24.9 Dark Up 67.7 180.6 Up 11:47:08 - 11:56:50 -1304
DCO 11:51:41 -23.7 Dark Up 66.2 183.8 Up 11:46:50 - 11:56:32 -1341
Yuma 11:52:07 -25.0 Dark Up 68.6 180.6 Up 11:47:16 - 11:56:58 -1348
Niwot 11:50:28 -17.5 AT Up 60.1 198.4 Up 11:45:37 - 11:55:19 -1669

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 281371, (2019/10/22 11:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.30  46
Alhena         06:37:42.8 +16:23:57  1.9  7.46  33
73 Ori         06:15:44.9 +12:33:03  5.4  1.26  39
PPM 122161     06:14:55.8 +11:39:08  8.0  0.36  40
PPM 122188     06:15:51.7 +11:12:03 10.0  0.18  40
281371         06:15:14.5 +11:18:06 14.8        40
Positions are for J2000

Event circumstances last updated at 2018/03/08 17:21:55 UT

Marc W. Buie, Southwest Research Institute

RECON