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 08:55:14 UTC

J2000 position of star is 07:02:18.5 +21:26:54
Equinox of date position of star is 07:03:23.4 +21:25:16
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 212 seconds.
The 1-sigma cross-track error in the shadow position is 1106 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 08:55UT)
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 4.2 sigma about the mid-time.
The median site spacing is 20.7 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 08:53:43 -58.1 Dark Down 50.5 238.8 Up 08:38:43 - 09:08:43 6039
Tonasket 08:53:42 -58.3 Dark Down 50.6 239.0 Up 08:38:42 - 09:08:42 6019
Okanogan 08:53:41 -58.7 Dark Down 50.9 239.2 Up 08:38:41 - 09:08:41 5987
Brewster 08:53:41 -59.0 Dark Down 51.2 239.3 Up 08:38:41 - 09:08:41 5959
Manson/Chelan 08:53:42 -59.2 Dark Down 51.5 239.1 Up 08:38:42 - 09:08:42 5932
Entiat 08:53:40 -59.5 Dark Down 51.6 239.2 Up 08:38:40 - 09:08:40 5911
Wenatchee 08:53:41 -59.7 Dark Down 51.8 239.4 Up 08:38:41 - 09:08:41 5886
Ellensburg 08:53:39 -60.2 Dark Down 52.2 239.6 Up 08:38:39 - 09:08:39 5844
Pasco 08:53:34 -60.5 Dark Down 51.7 242.0 Up 08:38:34 - 09:08:34 5813
Yakima 08:53:39 -60.5 Dark Down 52.4 240.0 Up 08:38:39 - 09:08:39 5808
PNWRO 08:53:32 -60.7 Dark Down 51.7 242.5 Up 08:38:32 - 09:08:32 5797
Toppenish/White Swan 08:53:38 -60.7 Dark Down 52.4 240.4 Up 08:38:38 - 09:08:38 5793
George/Umatilla 08:53:33 -60.9 Dark Down 52.0 242.1 Up 08:38:33 - 09:08:33 5778
Goldendale 08:53:38 -61.3 Dark Down 52.9 240.6 Up 08:38:38 - 09:08:38 5733
The Dalles 08:53:38 -61.6 Dark Down 53.3 240.4 Up 08:38:38 - 09:08:38 5704
Maupin 08:53:36 -62.0 Dark Down 53.4 241.0 Up 08:38:36 - 09:08:36 5669
Niwot 08:52:40 -59.4 Dark Up 44.1 261.4 Up 08:37:40 - 09:07:40 5654
Madras/Culver 08:53:35 -62.5 Dark Down 53.7 241.6 Up 08:38:35 - 09:08:35 5618
Redmond 08:53:35 -62.9 Dark Down 53.9 242.0 Up 08:38:35 - 09:08:35 5585
Sisters 08:53:35 -63.0 Dark Down 54.1 241.5 Up 08:38:35 - 09:08:35 5577
Bend 08:53:34 -63.1 Dark Down 54.1 242.1 Up 08:38:34 - 09:08:34 5562
Oregon Observatory 08:53:34 -63.3 Dark Down 54.2 242.1 Up 08:38:34 - 09:08:34 5542
La Pine/Gilchrist 08:53:33 -63.5 Dark Down 54.4 242.3 Up 08:38:33 - 09:08:33 5522
North Lake 08:53:31 -63.8 Dark Down 54.2 243.5 Up 08:38:31 - 09:08:31 5497
Paisley 08:53:29 -64.2 Dark Down 54.2 244.6 Up 08:38:29 - 09:08:29 5455
Lakeview 08:53:27 -64.6 Dark Down 54.3 245.5 Up 08:38:27 - 09:08:27 5413
Chiloquin 08:53:33 -64.7 Dark Down 55.1 243.3 Up 08:38:33 - 09:08:33 5410
Klamath Falls 08:53:31 -65.0 Dark Down 55.2 243.8 Up 08:38:31 - 09:08:31 5380
Tulelake 08:53:30 -65.1 Dark Down 55.1 244.5 Up 08:38:30 - 09:08:30 5363
Cedarville 08:53:25 -65.2 Dark Down 54.5 246.5 Up 08:38:25 - 09:08:25 5357
Fall River/Burney 08:53:28 -66.0 Dark Down 55.5 245.8 Up 08:38:28 - 09:08:28 5280
Susanville 08:53:23 -66.4 Dark Down 55.2 247.4 Up 08:38:23 - 09:08:23 5240
Gimple 08:53:23 -66.7 Dark Down 55.5 247.5 Up 08:38:23 - 09:08:23 5208
Greenville 08:53:24 -66.7 Dark Down 55.5 247.5 Up 08:38:24 - 09:08:24 5206
Portola 08:53:21 -66.9 Dark Down 55.3 248.4 Up 08:38:21 - 09:08:21 5187
Quincy 08:53:23 -66.9 Dark Down 55.6 247.7 Up 08:38:23 - 09:08:23 5187
Reno 08:53:19 -66.9 Dark Down 55.0 249.4 Up 08:38:19 - 09:08:19 5179
Carson City 08:53:18 -67.2 Dark Down 55.1 249.9 Up 08:38:18 - 09:08:18 5146
Yerington 08:53:15 -67.2 Dark Down 54.7 250.8 Up 08:38:15 - 09:08:15 5145
Gardnerville 08:53:17 -67.4 Dark Down 55.1 250.3 Up 08:38:17 - 09:08:17 5124
Hawthorne 08:53:13 -67.4 Dark Down 54.4 251.9 Up 08:38:13 - 09:08:13 5115
Tonopah 08:53:07 -67.2 Dark Up 53.5 253.9 Up 08:38:07 - 09:08:07 5110
Lee Vining 08:53:13 -68.1 Dark Down 55.0 252.2 Up 08:38:13 - 09:08:13 5048
Indian Springs 08:52:58 -67.7 Dark Up 52.8 257.1 Up 08:37:58 - 09:07:58 5013
Beatty 08:53:03 -68.0 Dark Up 53.5 255.8 Up 08:38:03 - 09:08:03 5013
Bishop 08:53:09 -68.3 Dark Up 54.6 253.7 Up 08:38:09 - 09:08:09 5011
Henderson 08:52:56 -67.8 Dark Up 52.3 258.3 Up 08:37:56 - 09:07:56 4983
Patrick 08:52:51 -67.6 Dark Up 51.6 260.0 Up 08:37:51 - 09:07:51 4956
DCO 08:52:48 -67.5 Dark Up 51.1 260.9 Up 08:37:48 - 09:07:48 4948
Lone Pine 08:53:06 -68.8 Dark Up 54.6 255.0 Up 08:38:06 - 09:08:06 4947
Searchlight/Boulder City 08:52:54 -68.2 Dark Up 52.4 259.1 Up 08:37:54 - 09:07:54 4929
Kingman/Dolan Springs 08:52:51 -67.9 Dark Up 51.8 260.1 Up 08:37:51 - 09:07:51 4929
Laughlin/Bullhead City 08:52:52 -68.2 Dark Up 52.2 259.7 Up 08:37:52 - 09:07:52 4911
Mohave Valley 08:52:52 -68.4 Dark Up 52.2 260.1 Up 08:37:52 - 09:07:52 4885
Lake Havasu City 08:52:49 -68.6 Dark Up 52.1 260.8 Up 08:37:49 - 09:07:49 4854
Parker 08:52:49 -68.8 Dark Up 52.1 261.2 Up 08:37:49 - 09:07:49 4821
Blythe 08:52:48 -69.3 Dark Up 52.5 261.7 Up 08:37:48 - 09:07:48 4761
CPSLO 08:53:12 -71.0 Dark Down 56.9 254.5 Up 08:38:12 - 09:08:12 4747
Idyllwild 08:52:55 -70.5 Dark Up 54.2 260.0 Up 08:37:55 - 09:07:55 4708
Wildwood 08:53:02 -71.1 Dark Up 55.6 258.0 Up 08:38:02 - 09:08:02 4687
Calipatria 08:52:50 -70.2 Dark Up 53.3 261.7 Up 08:37:50 - 09:07:50 4684
Yuma 08:52:46 -70.0 Dark Up 52.6 262.9 Up 08:37:46 - 09:07:46 4669

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 08:55UT)
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 2018/02/14 17:19:11 UT

Marc W. Buie, Southwest Research Institute

RECON