RECON: TNO occultation with 33340

Event between (33340) 98VG44 and star UC4-558-037524 with event index number of 177569

Geocentric closest approach at 2019/01/28 08:55:38 UTC

J2000 position of star is 07:02:18.5 +21:26:54
Equinox of date position of star is 07:03:19.7 +21:25:21
Stellar brightness R=15.0, use SENSEUP=128
Star is 120 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 29.5 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 1118 km.
The sky-plane scale is 20744.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 13.9 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 33340, (2019/01/28 08:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.9 +27:58:43  1.1 11.76 110
Alhena         06:38:48.8 +16:22:53  1.9  7.70 125
44 Gem         07:06:27.2 +22:36:26  5.9  1.38 119
PPM 096947     07:04:18.8 +21:08:44  8.5  0.34 119
PPM 096937     07:03:53.1 +21:43:17 10.1  0.32 120
33340          07:03:26.8 +21:25:10 15.0       119
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 3.8 sigma about the mid-time.
The median site spacing is 20.8 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:54:05 -58.1 Dark Down 50.5 238.9 Up 08:39:05 - 09:09:05 6135
Tonasket 08:54:04 -58.3 Dark Down 50.6 239.2 Up 08:39:04 - 09:09:04 6115
Okanogan 08:54:04 -58.6 Dark Down 50.9 239.3 Up 08:39:04 - 09:09:04 6083
Brewster 08:54:03 -58.9 Dark Down 51.1 239.4 Up 08:39:03 - 09:09:03 6054
Manson/Chelan 08:54:04 -59.2 Dark Down 51.4 239.2 Up 08:39:04 - 09:09:04 6028
Entiat 08:54:03 -59.4 Dark Down 51.6 239.3 Up 08:39:03 - 09:09:03 6007
Wenatchee 08:54:03 -59.7 Dark Down 51.8 239.5 Up 08:39:03 - 09:09:03 5982
Ellensburg 08:54:03 -60.1 Dark Down 52.1 239.7 Up 08:39:03 - 09:09:03 5940
Pasco 08:53:57 -60.5 Dark Down 51.6 242.1 Up 08:38:57 - 09:08:57 5909
Yakima 08:54:01 -60.5 Dark Down 52.3 240.1 Up 08:39:01 - 09:09:01 5904
PNWRO 08:53:55 -60.7 Dark Down 51.6 242.7 Up 08:38:55 - 09:08:55 5893
Toppenish/White Swan 08:54:01 -60.7 Dark Down 52.3 240.5 Up 08:39:01 - 09:09:01 5889
George/Umatilla 08:53:57 -60.9 Dark Down 51.9 242.3 Up 08:38:57 - 09:08:57 5874
Goldendale 08:54:00 -61.3 Dark Down 52.9 240.7 Up 08:39:00 - 09:09:00 5829
The Dalles 08:54:01 -61.6 Dark Down 53.2 240.5 Up 08:39:01 - 09:09:01 5800
Maupin 08:53:59 -62.0 Dark Down 53.3 241.1 Up 08:38:59 - 09:08:59 5765
Niwot 08:53:03 -59.4 Dark Up 44.0 261.5 Up 08:38:03 - 09:08:03 5754
Madras/Culver 08:53:58 -62.5 Dark Down 53.6 241.7 Up 08:38:58 - 09:08:58 5715
Redmond 08:53:57 -62.9 Dark Down 53.8 242.1 Up 08:38:57 - 09:08:57 5681
Sisters 08:53:59 -62.9 Dark Down 54.1 241.6 Up 08:38:59 - 09:08:59 5673
Bend 08:53:57 -63.1 Dark Down 54.0 242.2 Up 08:38:57 - 09:08:57 5658
Oregon Observatory 08:53:57 -63.3 Dark Down 54.2 242.2 Up 08:38:57 - 09:08:57 5639
La Pine/Gilchrist 08:53:56 -63.5 Dark Down 54.3 242.4 Up 08:38:56 - 09:08:56 5619
North Lake 08:53:54 -63.8 Dark Down 54.1 243.6 Up 08:38:54 - 09:08:54 5594
Paisley 08:53:51 -64.2 Dark Down 54.1 244.7 Up 08:38:51 - 09:08:51 5552
Lakeview 08:53:50 -64.6 Dark Down 54.2 245.6 Up 08:38:50 - 09:08:50 5510
Chiloquin 08:53:55 -64.6 Dark Down 55.1 243.4 Up 08:38:55 - 09:08:55 5507
Klamath Falls 08:53:54 -64.9 Dark Down 55.2 243.9 Up 08:38:54 - 09:08:54 5477
Tulelake 08:53:53 -65.1 Dark Down 55.1 244.6 Up 08:38:53 - 09:08:53 5460
Cedarville 08:53:49 -65.2 Dark Down 54.4 246.6 Up 08:38:49 - 09:08:49 5454
Fall River/Burney 08:53:50 -66.0 Dark Down 55.4 245.9 Up 08:38:50 - 09:08:50 5377
Susanville 08:53:46 -66.3 Dark Down 55.2 247.5 Up 08:38:46 - 09:08:46 5337
Gimple 08:53:46 -66.7 Dark Down 55.4 247.6 Up 08:38:46 - 09:08:46 5305
Greenville 08:53:47 -66.7 Dark Down 55.5 247.6 Up 08:38:47 - 09:08:47 5303
Portola 08:53:45 -66.8 Dark Down 55.3 248.5 Up 08:38:45 - 09:08:45 5285
Quincy 08:53:46 -66.9 Dark Down 55.5 247.8 Up 08:38:46 - 09:08:46 5284
Reno 08:53:42 -66.9 Dark Down 54.9 249.5 Up 08:38:42 - 09:08:42 5277
Carson City 08:53:40 -67.2 Dark Down 55.0 250.0 Up 08:38:40 - 09:08:40 5244
Yerington 08:53:39 -67.1 Dark Down 54.6 250.9 Up 08:38:39 - 09:08:39 5243
Gardnerville 08:53:40 -67.4 Dark Down 55.1 250.4 Up 08:38:40 - 09:08:40 5222
Hawthorne 08:53:35 -67.3 Dark Down 54.4 252.0 Up 08:38:35 - 09:08:35 5213
Tonopah 08:53:30 -67.2 Dark Up 53.5 253.9 Up 08:38:30 - 09:08:30 5209
Lee Vining 08:53:36 -68.0 Dark Down 54.9 252.3 Up 08:38:36 - 09:08:36 5146
Indian Springs 08:53:21 -67.7 Dark Up 52.7 257.2 Up 08:38:21 - 09:08:21 5112
Beatty 08:53:26 -67.9 Dark Up 53.4 255.8 Up 08:38:26 - 09:08:26 5111
Bishop 08:53:32 -68.3 Dark Up 54.6 253.8 Up 08:38:32 - 09:08:32 5109
Henderson 08:53:18 -67.7 Dark Up 52.3 258.4 Up 08:38:18 - 09:08:18 5081
Patrick 08:53:14 -67.6 Dark Up 51.5 260.0 Up 08:38:14 - 09:08:14 5055
DCO 08:53:10 -67.4 Dark Up 51.0 260.9 Up 08:38:10 - 09:08:10 5047
Lone Pine 08:53:29 -68.8 Dark Up 54.5 255.1 Up 08:38:29 - 09:08:29 5045
Searchlight/Boulder City 08:53:17 -68.1 Dark Up 52.3 259.2 Up 08:38:17 - 09:08:17 5028
Kingman/Dolan Springs 08:53:14 -67.9 Dark Up 51.7 260.2 Up 08:38:14 - 09:08:14 5028
Laughlin/Bullhead City 08:53:15 -68.2 Dark Up 52.1 259.8 Up 08:38:15 - 09:08:15 5010
Mohave Valley 08:53:14 -68.4 Dark Up 52.2 260.2 Up 08:38:14 - 09:08:14 4984
Lake Havasu City 08:53:12 -68.5 Dark Up 52.0 260.8 Up 08:38:12 - 09:08:12 4953
Parker 08:53:11 -68.7 Dark Up 52.1 261.3 Up 08:38:11 - 09:08:11 4919
Blythe 08:53:11 -69.3 Dark Up 52.4 261.8 Up 08:38:11 - 09:08:11 4859
CPSLO 08:53:34 -71.0 Dark Down 56.9 254.6 Up 08:38:34 - 09:08:34 4844
Idyllwild 08:53:17 -70.4 Dark Up 54.1 260.1 Up 08:38:17 - 09:08:17 4807
Wildwood 08:53:25 -71.1 Dark Up 55.5 258.1 Up 08:38:25 - 09:08:25 4785
Calipatria 08:53:13 -70.2 Dark Up 53.2 261.7 Up 08:38:13 - 09:08:13 4783
Yuma 08:53:09 -70.0 Dark Up 52.5 262.9 Up 08:38:09 - 09:08:09 4768

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 33340, (2019/01/28 08:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 11.76 110
Alhena         06:37:42.8 +16:23:57  1.9  7.70 125
44 Gem         07:05:18.4 +22:38:15  5.9  1.38 119
PPM 096947     07:03:10.6 +21:10:29  8.5  0.34 119
PPM 096937     07:02:44.6 +21:45:02 10.1  0.32 120
33340          07:02:18.5 +21:26:54 15.0       120
Positions are for J2000

Event circumstances last updated at 2017/02/01 18:26:36 UT

Marc W. Buie, Southwest Research Institute

RECON