RECON: TNO occultation with 33128

Event between (33128) 98BU48 and star UC4-507-052412 with event index number of 187876

Geocentric closest approach at 2019/05/01 03:38:50 UTC

J2000 position of star is 11:55:17.5 +11:23:51
Equinox of date position of star is 11:56:12.8 +11:17:52
Stellar brightness R=10.7, use SENSEUP=4
Star is 174 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 35.4 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 16.7 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 267 seconds.
The 1-sigma cross-track error in the shadow position is 2006 km.
The sky-plane scale is 25186.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 15.0 sec chord
Diameter=102.6 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 33128, (2019/05/01 03:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:24.0 +11:52:19  1.3 26.17 153
Denebola       11:50:02.7 +14:27:50  2.1  3.52 171
6 Vir          11:56:02.6 +08:20:11  5.6  2.95 177
PPM 128637     11:55:06.7 +11:56:55  8.4  0.72 174
PPM 128662     11:56:48.5 +11:08:46  9.5  0.19 174
33128          11:56:17.1 +11:17:24 10.7       174
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 3.4 sigma about the mid-time.
The median site spacing is 35.9 km RECON observability=0.2 and success probability=10.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:41:27 -5.1 CT Down 47.5 143.7 Up 03:26:27 - 03:56:27 2641
Tonasket 03:41:27 -5.3 CT Down 47.6 143.5 Up 03:26:27 - 03:56:27 2620
Okanogan 03:41:29 -5.4 CT Down 47.9 143.1 Up 03:26:29 - 03:56:29 2587
Brewster 03:41:30 -5.4 CT Down 48.0 142.7 Up 03:26:30 - 03:56:30 2560
Manson/Chelan 03:41:31 -5.3 CT Down 48.0 142.1 Up 03:26:31 - 03:56:31 2536
Entiat 03:41:32 -5.3 CT Down 48.2 141.8 Up 03:26:32 - 03:56:32 2515
Wenatchee 03:41:32 -5.4 CT Down 48.3 141.5 Up 03:26:32 - 03:56:32 2490
Ellensburg 03:41:34 -5.5 CT Down 48.5 140.9 Up 03:26:34 - 03:56:34 2449
Yakima 03:41:35 -5.7 CT Down 48.9 140.6 Up 03:26:35 - 03:56:35 2410
Pasco 03:41:28 -6.7 CT Down 49.7 142.3 Up 03:26:28 - 03:56:28 2393
Toppenish/White Swan 03:41:34 -5.9 CT Down 49.1 140.7 Up 03:26:34 - 03:56:34 2391
PNWRO 03:41:28 -6.9 CT Down 50.0 142.4 Up 03:26:28 - 03:56:28 2372
George/Umatilla 03:41:30 -6.7 CT Down 49.9 141.7 Up 03:26:30 - 03:56:30 2359
Goldendale 03:41:36 -5.9 CT Down 49.3 139.7 Up 03:26:36 - 03:56:36 2334
The Dalles 03:41:37 -5.8 CT Down 49.3 139.1 Up 03:26:37 - 03:56:37 2308
Maupin 03:41:37 -6.0 CT Down 49.7 138.9 Up 03:26:37 - 03:56:37 2269
Madras/Culver 03:41:38 -6.3 CT Down 50.1 138.4 Up 03:26:38 - 03:56:38 2216
Redmond 03:41:38 -6.4 CT Down 50.3 138.0 Up 03:26:38 - 03:56:38 2181
Sisters 03:41:40 -6.1 CT Down 50.1 137.5 Up 03:26:40 - 03:56:40 2179
Bend 03:41:39 -6.4 CT Down 50.4 137.7 Up 03:26:39 - 03:56:39 2158
Oregon Observatory 03:41:39 -6.4 CT Down 50.5 137.4 Up 03:26:39 - 03:56:39 2140
La Pine/Gilchrist 03:41:40 -6.5 CT Down 50.6 137.1 Up 03:26:40 - 03:56:40 2119
North Lake 03:41:37 -7.1 CT Down 51.2 137.6 Up 03:26:37 - 03:56:37 2083
Paisley 03:41:36 -7.5 CT Down 51.8 137.6 Up 03:26:36 - 03:56:36 2033
Chiloquin 03:41:41 -6.8 CT Down 51.3 135.7 Up 03:26:41 - 03:56:41 2006
Niwot 03:40:25 -18.4 Dark Down 59.9 159.9 Up 03:25:25 - 03:55:25 1999
Lakeview 03:41:35 -7.9 CT Down 52.3 137.4 Up 03:26:35 - 03:56:35 1985
Klamath Falls 03:41:41 -7.0 CT Down 51.5 135.5 Up 03:26:41 - 03:56:41 1973
Tulelake 03:41:41 -7.3 CT Down 51.9 135.7 Up 03:26:41 - 03:56:41 1950
Cedarville 03:41:36 -8.3 CT Down 52.9 137.1 Up 03:26:36 - 03:56:36 1922
Fall River/Burney 03:41:41 -7.8 CT Down 52.6 135.0 Up 03:26:41 - 03:56:41 1860
Susanville 03:41:38 -8.6 CT Down 53.4 135.4 Up 03:26:38 - 03:56:38 1806
Gimple 03:41:39 -8.5 CT Down 53.5 134.8 Up 03:26:39 - 03:56:39 1775
Greenville 03:41:39 -8.5 CT Down 53.5 134.7 Up 03:26:39 - 03:56:39 1774
Quincy 03:41:39 -8.6 CT Down 53.6 134.5 Up 03:26:39 - 03:56:39 1754
Portola 03:41:37 -9.0 CT Down 53.9 135.1 Up 03:26:37 - 03:56:37 1747
Reno 03:41:34 -9.5 CT Down 54.5 135.7 Up 03:26:34 - 03:56:34 1728
Carson City 03:41:34 -9.7 CT Down 54.7 135.4 Up 03:26:34 - 03:56:34 1692
Yerington 03:41:31 -10.2 CT Down 55.2 136.1 Up 03:26:31 - 03:56:31 1680
Gardnerville 03:41:34 -9.9 CT Down 54.9 135.2 Up 03:26:34 - 03:56:34 1668
Hawthorne 03:41:29 -10.8 CT Down 55.8 136.3 Up 03:26:29 - 03:56:29 1640
Tonopah 03:41:23 -12.0 CT Down 56.9 137.9 Up 03:26:23 - 03:56:23 1611
Lee Vining 03:41:31 -10.8 CT Down 56.0 135.1 Up 03:26:31 - 03:56:31 1576
Bishop 03:41:28 -11.5 CT Down 56.8 135.5 Up 03:26:28 - 03:56:28 1524
Beatty 03:41:21 -12.9 AT Down 58.0 137.4 Up 03:26:21 - 03:56:21 1499
Indian Springs 03:41:15 -13.8 AT Down 58.8 138.7 Up 03:26:15 - 03:56:15 1481
Lone Pine 03:41:27 -12.1 AT Down 57.5 135.1 Up 03:26:27 - 03:56:27 1451
Henderson 03:41:12 -14.5 AT Down 59.6 139.2 Up 03:26:12 - 03:56:12 1436
Patrick 03:41:06 -15.6 AT Down 60.6 140.3 Up 03:26:06 - 03:56:06 1388
Searchlight/Boulder City 03:41:11 -14.9 AT Down 60.1 138.6 Up 03:26:11 - 03:56:11 1378
DCO 03:41:02 -16.2 AT Down 61.2 141.2 Up 03:26:02 - 03:56:02 1368
Kingman/Dolan Springs 03:41:06 -15.6 AT Down 60.7 139.7 Up 03:26:06 - 03:56:06 1362
Laughlin/Bullhead City 03:41:09 -15.2 AT Down 60.5 138.9 Up 03:26:09 - 03:56:09 1352
Mohave Valley 03:41:09 -15.4 AT Down 60.7 138.6 Up 03:26:09 - 03:56:09 1324
Lake Havasu City 03:41:08 -15.8 AT Down 61.1 138.5 Up 03:26:08 - 03:56:08 1287
CPSLO 03:41:39 -10.9 CT Down 56.9 130.0 Up 03:26:39 - 03:56:39 1283
Parker 03:41:09 -16.0 AT Down 61.4 138.1 Up 03:26:09 - 03:56:09 1251
Blythe 03:41:09 -16.0 AT Down 61.6 137.0 Up 03:26:09 - 03:56:09 1192
Wildwood 03:41:30 -13.0 AT Down 58.9 131.4 Up 03:26:30 - 03:56:30 1184
Idyllwild 03:41:20 -14.5 AT Down 60.3 133.7 Up 03:26:20 - 03:56:20 1173
Calipatria 03:41:14 -15.6 AT Down 61.4 134.8 Up 03:26:14 - 03:56:14 1127
Yuma 03:41:09 -16.5 AT Down 62.3 135.7 Up 03:26:09 - 03:56:09 1095

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 33128, (2019/05/01 03:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 26.17 153
Denebola       11:49:03.0 +14:34:17  2.1  3.52 171
6 Vir          11:55:03.1 +08:26:38  5.6  2.95 177
PPM 128637     11:54:07.1 +12:03:22  8.4  0.72 174
PPM 128662     11:55:49.0 +11:15:14  9.5  0.19 174
33128          11:55:17.5 +11:23:51 10.7       174
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:53:41 UT

Marc W. Buie, Southwest Research Institute

RECON