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 11:56:10.9 +11:18:04
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 192 seconds.
The 1-sigma cross-track error in the shadow position is 1655 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 4.7 sigma about the mid-time.
The median site spacing is 35.9 km RECON observability=0.2 and success probability=12.4%
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 2644
Tonasket 03:41:27 -5.3 CT Down 47.6 143.5 Up 03:26:27 - 03:56:27 2623
Okanogan 03:41:28 -5.4 CT Down 47.9 143.1 Up 03:26:28 - 03:56:28 2590
Brewster 03:41:29 -5.4 CT Down 48.0 142.7 Up 03:26:29 - 03:56:29 2563
Manson/Chelan 03:41:30 -5.3 CT Down 48.0 142.0 Up 03:26:30 - 03:56:30 2539
Entiat 03:41:30 -5.3 CT Down 48.2 141.8 Up 03:26:30 - 03:56:30 2518
Wenatchee 03:41:31 -5.4 CT Down 48.3 141.5 Up 03:26:31 - 03:56:31 2493
Ellensburg 03:41:32 -5.5 CT Down 48.5 140.9 Up 03:26:32 - 03:56:32 2452
Yakima 03:41:32 -5.7 CT Down 48.9 140.6 Up 03:26:32 - 03:56:32 2413
Pasco 03:41:27 -6.7 CT Down 49.7 142.3 Up 03:26:27 - 03:56:27 2396
Toppenish/White Swan 03:41:32 -5.9 CT Down 49.1 140.7 Up 03:26:32 - 03:56:32 2394
PNWRO 03:41:26 -6.9 CT Down 50.0 142.4 Up 03:26:26 - 03:56:26 2376
George/Umatilla 03:41:28 -6.7 CT Down 49.9 141.7 Up 03:26:28 - 03:56:28 2362
Goldendale 03:41:34 -5.9 CT Down 49.3 139.7 Up 03:26:34 - 03:56:34 2337
The Dalles 03:41:36 -5.8 CT Down 49.3 139.1 Up 03:26:36 - 03:56:36 2311
Maupin 03:41:36 -6.0 CT Down 49.7 138.9 Up 03:26:36 - 03:56:36 2272
Madras/Culver 03:41:36 -6.3 CT Down 50.1 138.4 Up 03:26:36 - 03:56:36 2219
Redmond 03:41:37 -6.4 CT Down 50.3 138.0 Up 03:26:37 - 03:56:37 2184
Sisters 03:41:38 -6.1 CT Down 50.1 137.5 Up 03:26:38 - 03:56:38 2182
Bend 03:41:38 -6.4 CT Down 50.4 137.7 Up 03:26:38 - 03:56:38 2162
Oregon Observatory 03:41:38 -6.4 CT Down 50.5 137.4 Up 03:26:38 - 03:56:38 2144
La Pine/Gilchrist 03:41:38 -6.5 CT Down 50.6 137.1 Up 03:26:38 - 03:56:38 2123
North Lake 03:41:37 -7.1 CT Down 51.2 137.6 Up 03:26:37 - 03:56:37 2087
Paisley 03:41:35 -7.5 CT Down 51.8 137.6 Up 03:26:35 - 03:56:35 2037
Chiloquin 03:41:41 -6.8 CT Down 51.3 135.7 Up 03:26:41 - 03:56:41 2010
Niwot 03:40:24 -18.4 Dark Down 59.9 159.9 Up 03:25:24 - 03:55:24 2005
Lakeview 03:41:34 -7.9 CT Down 52.3 137.4 Up 03:26:34 - 03:56:34 1989
Klamath Falls 03:41:41 -7.0 CT Down 51.5 135.5 Up 03:26:41 - 03:56:41 1977
Tulelake 03:41:39 -7.3 CT Down 51.9 135.7 Up 03:26:39 - 03:56:39 1954
Cedarville 03:41:34 -8.3 CT Down 52.9 137.0 Up 03:26:34 - 03:56:34 1926
Fall River/Burney 03:41:40 -7.8 CT Down 52.6 135.0 Up 03:26:40 - 03:56:40 1864
Susanville 03:41:36 -8.5 CT Down 53.4 135.4 Up 03:26:36 - 03:56:36 1809
Gimple 03:41:38 -8.5 CT Down 53.5 134.8 Up 03:26:38 - 03:56:38 1779
Greenville 03:41:38 -8.5 CT Down 53.5 134.7 Up 03:26:38 - 03:56:38 1778
Quincy 03:41:38 -8.6 CT Down 53.6 134.5 Up 03:26:38 - 03:56:38 1758
Portola 03:41:36 -9.0 CT Down 53.9 135.0 Up 03:26:36 - 03:56:36 1751
Reno 03:41:33 -9.5 CT Down 54.5 135.7 Up 03:26:33 - 03:56:33 1732
Carson City 03:41:33 -9.7 CT Down 54.7 135.4 Up 03:26:33 - 03:56:33 1696
Yerington 03:41:30 -10.2 CT Down 55.2 136.0 Up 03:26:30 - 03:56:30 1684
Gardnerville 03:41:33 -9.9 CT Down 54.9 135.2 Up 03:26:33 - 03:56:33 1672
Hawthorne 03:41:28 -10.8 CT Down 55.8 136.3 Up 03:26:28 - 03:56:28 1644
Tonopah 03:41:21 -12.0 CT Down 56.9 137.9 Up 03:26:21 - 03:56:21 1615
Lee Vining 03:41:30 -10.7 CT Down 56.0 135.1 Up 03:26:30 - 03:56:30 1580
Bishop 03:41:27 -11.5 CT Down 56.8 135.5 Up 03:26:27 - 03:56:27 1528
Beatty 03:41:18 -12.9 AT Down 58.0 137.4 Up 03:26:18 - 03:56:18 1503
Indian Springs 03:41:14 -13.8 AT Down 58.8 138.7 Up 03:26:14 - 03:56:14 1485
Lone Pine 03:41:25 -12.1 AT Down 57.5 135.1 Up 03:26:25 - 03:56:25 1455
Henderson 03:41:10 -14.5 AT Down 59.6 139.2 Up 03:26:10 - 03:56:10 1440
Patrick 03:41:05 -15.6 AT Down 60.6 140.3 Up 03:26:05 - 03:56:05 1393
Searchlight/Boulder City 03:41:10 -14.9 AT Down 60.1 138.6 Up 03:26:10 - 03:56:10 1382
DCO 03:41:01 -16.2 AT Down 61.2 141.1 Up 03:26:01 - 03:56:01 1372
Kingman/Dolan Springs 03:41:06 -15.6 AT Down 60.7 139.7 Up 03:26:06 - 03:56:06 1367
Laughlin/Bullhead City 03:41:09 -15.2 AT Down 60.5 138.9 Up 03:26:09 - 03:56:09 1357
Mohave Valley 03:41:09 -15.4 AT Down 60.7 138.6 Up 03:26:09 - 03:56:09 1329
Lake Havasu City 03:41:07 -15.8 AT Down 61.1 138.5 Up 03:26:07 - 03:56:07 1291
CPSLO 03:41:38 -10.9 CT Down 56.9 130.0 Up 03:26:38 - 03:56:38 1287
Parker 03:41:07 -16.0 AT Down 61.4 138.1 Up 03:26:07 - 03:56:07 1255
Blythe 03:41:08 -16.0 AT Down 61.6 137.0 Up 03:26:08 - 03:56:08 1196
Wildwood 03:41:28 -13.0 AT Down 58.9 131.4 Up 03:26:28 - 03:56:28 1188
Idyllwild 03:41:18 -14.5 AT Down 60.3 133.7 Up 03:26:18 - 03:56:18 1177
Calipatria 03:41:13 -15.6 AT Down 61.4 134.8 Up 03:26:13 - 03:56:13 1131
Yuma 03:41:08 -16.5 AT Down 62.2 135.7 Up 03:26:08 - 03:56:08 1099

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 +11:15:13  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 2017/05/01 17:22:06 UT

Marc W. Buie, Southwest Research Institute

RECON