RECON: TNO occultation with 33128

Event between (33128) 98BU48 and star GA1000:03555311 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 11:56:14.3 +11:17:41
Stellar brightness G=9.8, use SENSEUP=2
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 +11:17:23  9.8       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 31.5 km RECON observability=0.2 and success probability=13.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 03:42:49 -5.0 CT Down 47.1 144.4 Up 03:27:49 - 03:57:49 1187
Oroville 03:42:49 -5.3 CT Down 47.6 144.1 Up 03:27:49 - 03:57:49 1133
Tonasket 03:42:49 -5.5 CT Down 47.8 144.0 Up 03:27:49 - 03:57:49 1112
Okanogan 03:42:50 -5.5 CT Down 48.0 143.6 Up 03:27:50 - 03:57:50 1079
Brewster 03:42:51 -5.6 CT Down 48.1 143.1 Up 03:27:51 - 03:57:51 1052
Manson/Chelan 03:42:53 -5.5 CT Down 48.2 142.5 Up 03:27:53 - 03:57:53 1028
Entiat 03:42:53 -5.5 CT Down 48.3 142.3 Up 03:27:53 - 03:57:53 1007
Wenatchee 03:42:54 -5.6 CT Down 48.5 142.0 Up 03:27:54 - 03:57:54 982
Ellensburg 03:42:55 -5.7 CT Down 48.7 141.4 Up 03:27:55 - 03:57:55 941
Yakima 03:42:55 -5.9 CT Down 49.0 141.1 Up 03:27:55 - 03:57:55 902
Pasco 03:42:50 -6.9 CT Down 49.9 142.8 Up 03:27:50 - 03:57:50 886
Toppenish/White Swan 03:42:54 -6.1 CT Down 49.2 141.1 Up 03:27:54 - 03:57:54 884
PNWRO 03:42:49 -7.1 CT Down 50.2 142.9 Up 03:27:49 - 03:57:49 865
George/Umatilla 03:42:51 -6.9 CT Down 50.0 142.2 Up 03:27:51 - 03:57:51 851
Goldendale 03:42:57 -6.1 CT Down 49.5 140.2 Up 03:27:57 - 03:57:57 826
The Dalles 03:42:58 -6.0 CT Down 49.5 139.5 Up 03:27:58 - 03:57:58 801
Maupin 03:42:58 -6.2 CT Down 49.9 139.3 Up 03:27:58 - 03:57:58 762
Madras/Culver 03:42:59 -6.5 CT Down 50.3 138.9 Up 03:27:59 - 03:57:59 708
Redmond 03:42:59 -6.6 CT Down 50.5 138.5 Up 03:27:59 - 03:57:59 673
Sisters 03:43:01 -6.3 CT Down 50.3 138.0 Up 03:28:01 - 03:58:01 671
Bend 03:43:00 -6.6 CT Down 50.6 138.1 Up 03:28:00 - 03:58:00 651
Oregon Observatory 03:43:01 -6.6 CT Down 50.7 137.8 Up 03:28:01 - 03:58:01 633
La Pine/Gilchrist 03:43:01 -6.7 CT Down 50.8 137.6 Up 03:28:01 - 03:58:01 612
North Lake 03:42:59 -7.3 CT Down 51.4 138.0 Up 03:27:59 - 03:57:59 576
Paisley 03:42:58 -7.8 CT Down 52.0 138.0 Up 03:27:58 - 03:57:58 526
Chiloquin 03:43:03 -7.0 CT Down 51.4 136.2 Up 03:28:03 - 03:58:03 499
Niwot 03:41:47 -18.6 Dark Down 60.0 160.6 Up 03:26:47 - 03:56:47 494
Lakeview 03:42:57 -8.1 CT Down 52.5 137.9 Up 03:27:57 - 03:57:57 478
Klamath Falls 03:43:03 -7.2 CT Down 51.7 136.0 Up 03:28:03 - 03:58:03 466
Tulelake 03:43:02 -7.5 CT Down 52.1 136.1 Up 03:28:02 - 03:58:02 442
Cedarville 03:42:57 -8.6 CT Down 53.0 137.5 Up 03:27:57 - 03:57:57 415
Fall River/Burney 03:43:02 -8.0 CT Down 52.8 135.4 Up 03:28:02 - 03:58:02 353
Susanville 03:42:59 -8.8 CT Down 53.6 135.9 Up 03:27:59 - 03:57:59 298
Gimple 03:43:00 -8.8 CT Down 53.7 135.3 Up 03:28:00 - 03:58:00 268
Greenville 03:43:01 -8.7 CT Down 53.6 135.2 Up 03:28:01 - 03:58:01 267
Quincy 03:43:01 -8.8 CT Down 53.8 135.0 Up 03:28:01 - 03:58:01 247
Portola 03:42:58 -9.2 CT Down 54.1 135.5 Up 03:27:58 - 03:57:58 240
Reno 03:42:56 -9.8 CT Down 54.7 136.2 Up 03:27:56 - 03:57:56 221
Carson City 03:42:56 -9.9 CT Down 54.9 135.8 Up 03:27:56 - 03:57:56 185
Yerington 03:42:53 -10.5 CT Down 55.4 136.5 Up 03:27:53 - 03:57:53 173
Gardnerville 03:42:55 -10.1 CT Down 55.1 135.7 Up 03:27:55 - 03:57:55 161
Hawthorne 03:42:50 -11.0 CT Down 56.0 136.8 Up 03:27:50 - 03:57:50 133
Tonopah 03:42:44 -12.2 AT Down 57.1 138.4 Up 03:27:44 - 03:57:44 104
Lee Vining 03:42:53 -11.0 CT Down 56.2 135.6 Up 03:27:53 - 03:57:53 69
Bishop 03:42:50 -11.8 CT Down 57.0 136.0 Up 03:27:50 - 03:57:50 18
Beatty 03:42:42 -13.1 AT Down 58.2 137.9 Up 03:27:42 - 03:57:42 -8
Indian Springs 03:42:36 -14.0 AT Down 59.0 139.2 Up 03:27:36 - 03:57:36 -26
Lone Pine 03:42:48 -12.4 AT Down 57.7 135.6 Up 03:27:48 - 03:57:48 -56
Henderson 03:42:33 -14.8 AT Down 59.8 139.8 Up 03:27:33 - 03:57:33 -70
Patrick 03:42:27 -15.8 AT Down 60.8 140.9 Up 03:27:27 - 03:57:27 -118
Searchlight/Boulder City 03:42:32 -15.1 AT Down 60.2 139.2 Up 03:27:32 - 03:57:32 -128
DCO 03:42:24 -16.5 AT Down 61.4 141.8 Up 03:27:24 - 03:57:24 -139
Kingman/Dolan Springs 03:42:28 -15.8 AT Down 60.9 140.3 Up 03:27:28 - 03:57:28 -144
Laughlin/Bullhead City 03:42:31 -15.5 AT Down 60.6 139.4 Up 03:27:31 - 03:57:31 -154
Mohave Valley 03:42:31 -15.6 AT Down 60.9 139.1 Up 03:27:31 - 03:57:31 -182
Lake Havasu City 03:42:29 -16.0 AT Down 61.3 139.1 Up 03:27:29 - 03:57:29 -219
CPSLO 03:43:01 -11.2 CT Down 57.1 130.4 Up 03:28:01 - 03:58:01 -224
Parker 03:42:29 -16.2 AT Down 61.6 138.7 Up 03:27:29 - 03:57:29 -255
Blythe 03:42:30 -16.3 AT Down 61.8 137.5 Up 03:27:30 - 03:57:30 -314
Wildwood 03:42:50 -13.2 AT Down 59.1 131.9 Up 03:27:50 - 03:57:50 -323
Idyllwild 03:42:41 -14.7 AT Down 60.5 134.3 Up 03:27:41 - 03:57:41 -334
Calipatria 03:42:35 -15.9 AT Down 61.6 135.4 Up 03:27:35 - 03:57:35 -380
Yuma 03:42:30 -16.7 AT Down 62.5 136.3 Up 03:27:30 - 03:57:30 -411

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  9.8       174
Positions are for J2000

Event circumstances last updated at 2018/06/11 23:04:31 UT

Marc W. Buie, Southwest Research Institute

RECON