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 08:55:39 UTC

J2000 position of star is 07:02:18.5 +21:26:54
Equinox of date position of star is 07:03:23.1 +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 280 seconds.
The 1-sigma cross-track error in the shadow position is 1153 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 3.2 sigma about the mid-time.
The median site spacing is 20.8 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:54:06 -58.1 Dark Down 50.5 238.9 Up 08:39:06 - 09:09:06 6128
Tonasket 08:54:05 -58.3 Dark Down 50.6 239.2 Up 08:39:05 - 09:09:05 6108
Okanogan 08:54:05 -58.6 Dark Down 50.8 239.3 Up 08:39:05 - 09:09:05 6076
Brewster 08:54:04 -58.9 Dark Down 51.1 239.4 Up 08:39:04 - 09:09:04 6047
Manson/Chelan 08:54:05 -59.2 Dark Down 51.4 239.2 Up 08:39:05 - 09:09:05 6021
Entiat 08:54:05 -59.4 Dark Down 51.6 239.3 Up 08:39:05 - 09:09:05 6000
Wenatchee 08:54:04 -59.7 Dark Down 51.8 239.5 Up 08:39:04 - 09:09:04 5975
Ellensburg 08:54:04 -60.1 Dark Down 52.1 239.7 Up 08:39:04 - 09:09:04 5933
Pasco 08:53:57 -60.5 Dark Down 51.6 242.1 Up 08:38:57 - 09:08:57 5902
Yakima 08:54:03 -60.5 Dark Down 52.3 240.1 Up 08:39:03 - 09:09:03 5897
PNWRO 08:53:57 -60.7 Dark Down 51.6 242.7 Up 08:38:57 - 09:08:57 5886
Toppenish/White Swan 08:54:01 -60.7 Dark Down 52.3 240.6 Up 08:39:01 - 09:09:01 5882
George/Umatilla 08:53:58 -60.9 Dark Down 51.9 242.3 Up 08:38:58 - 09:08:58 5867
Goldendale 08:54:02 -61.3 Dark Down 52.9 240.7 Up 08:39:02 - 09:09:02 5822
The Dalles 08:54:02 -61.6 Dark Down 53.2 240.5 Up 08:39:02 - 09:09:02 5793
Maupin 08:54:01 -62.0 Dark Down 53.3 241.1 Up 08:39:01 - 09:09:01 5758
Niwot 08:53:03 -59.4 Dark Up 44.0 261.5 Up 08:38:03 - 09:08:03 5744
Madras/Culver 08:53:59 -62.5 Dark Down 53.6 241.7 Up 08:38:59 - 09:08:59 5707
Redmond 08:53:58 -62.9 Dark Down 53.8 242.1 Up 08:38:58 - 09:08:58 5674
Sisters 08:54:00 -62.9 Dark Down 54.1 241.6 Up 08:39:00 - 09:09:00 5666
Bend 08:53:58 -63.1 Dark Down 54.0 242.2 Up 08:38:58 - 09:08:58 5651
Oregon Observatory 08:53:58 -63.3 Dark Down 54.2 242.2 Up 08:38:58 - 09:08:58 5631
La Pine/Gilchrist 08:53:58 -63.5 Dark Down 54.3 242.4 Up 08:38:58 - 09:08:58 5611
North Lake 08:53:55 -63.8 Dark Down 54.1 243.6 Up 08:38:55 - 09:08:55 5586
Paisley 08:53:53 -64.2 Dark Down 54.1 244.7 Up 08:38:53 - 09:08:53 5544
Lakeview 08:53:51 -64.6 Dark Down 54.2 245.6 Up 08:38:51 - 09:08:51 5502
Chiloquin 08:53:57 -64.6 Dark Down 55.1 243.4 Up 08:38:57 - 09:08:57 5499
Klamath Falls 08:53:55 -64.9 Dark Down 55.2 243.9 Up 08:38:55 - 09:08:55 5470
Tulelake 08:53:54 -65.1 Dark Down 55.1 244.6 Up 08:38:54 - 09:08:54 5452
Cedarville 08:53:49 -65.2 Dark Down 54.4 246.6 Up 08:38:49 - 09:08:49 5446
Fall River/Burney 08:53:51 -66.0 Dark Down 55.4 245.9 Up 08:38:51 - 09:08:51 5369
Susanville 08:53:48 -66.3 Dark Down 55.2 247.5 Up 08:38:48 - 09:08:48 5329
Gimple 08:53:48 -66.6 Dark Down 55.4 247.7 Up 08:38:48 - 09:08:48 5297
Greenville 08:53:47 -66.7 Dark Down 55.5 247.6 Up 08:38:47 - 09:08:47 5295
Portola 08:53:45 -66.8 Dark Down 55.3 248.5 Up 08:38:45 - 09:08:45 5276
Quincy 08:53:47 -66.9 Dark Down 55.5 247.8 Up 08:38:47 - 09:08:47 5276
Reno 08:53:42 -66.9 Dark Down 54.9 249.5 Up 08:38:42 - 09:08:42 5269
Carson City 08:53:42 -67.2 Dark Down 55.0 250.0 Up 08:38:42 - 09:08:42 5235
Yerington 08:53:39 -67.1 Dark Down 54.6 250.9 Up 08:38:39 - 09:08:39 5234
Gardnerville 08:53:41 -67.4 Dark Down 55.1 250.4 Up 08:38:41 - 09:08:41 5213
Hawthorne 08:53:36 -67.3 Dark Down 54.4 252.0 Up 08:38:36 - 09:08:36 5204
Tonopah 08:53:31 -67.2 Dark Up 53.5 253.9 Up 08:38:31 - 09:08:31 5200
Lee Vining 08:53:37 -68.0 Dark Down 54.9 252.3 Up 08:38:37 - 09:08:37 5137
Indian Springs 08:53:23 -67.7 Dark Up 52.7 257.2 Up 08:38:23 - 09:08:23 5103
Beatty 08:53:26 -67.9 Dark Up 53.4 255.8 Up 08:38:26 - 09:08:26 5102
Bishop 08:53:33 -68.3 Dark Up 54.5 253.8 Up 08:38:33 - 09:08:33 5100
Henderson 08:53:19 -67.7 Dark Up 52.3 258.4 Up 08:38:19 - 09:08:19 5072
Patrick 08:53:14 -67.6 Dark Up 51.5 260.0 Up 08:38:14 - 09:08:14 5046
DCO 08:53:12 -67.4 Dark Up 51.0 260.9 Up 08:38:12 - 09:08:12 5038
Lone Pine 08:53:30 -68.8 Dark Up 54.5 255.1 Up 08:38:30 - 09:08:30 5036
Searchlight/Boulder City 08:53:18 -68.1 Dark Up 52.3 259.2 Up 08:38:18 - 09:08:18 5019
Kingman/Dolan Springs 08:53:14 -67.9 Dark Up 51.7 260.2 Up 08:38:14 - 09:08:14 5019
Laughlin/Bullhead City 08:53:16 -68.2 Dark Up 52.1 259.8 Up 08:38:16 - 09:08:16 5001
Mohave Valley 08:53:15 -68.4 Dark Up 52.2 260.2 Up 08:38:15 - 09:08:15 4975
Lake Havasu City 08:53:14 -68.5 Dark Up 52.0 260.8 Up 08:38:14 - 09:08:14 4944
Parker 08:53:13 -68.7 Dark Up 52.1 261.3 Up 08:38:13 - 09:08:13 4911
Blythe 08:53:12 -69.3 Dark Up 52.4 261.8 Up 08:38:12 - 09:08:12 4850
CPSLO 08:53:35 -71.0 Dark Down 56.9 254.6 Up 08:38:35 - 09:08:35 4836
Idyllwild 08:53:19 -70.4 Dark Up 54.1 260.1 Up 08:38:19 - 09:08:19 4797
Wildwood 08:53:26 -71.1 Dark Up 55.5 258.1 Up 08:38:26 - 09:08:26 4776
Calipatria 08:53:14 -70.2 Dark Up 53.2 261.7 Up 08:38:14 - 09:08:14 4774
Yuma 08:53:10 -70.0 Dark Up 52.5 262.9 Up 08:38:10 - 09:08:10 4759

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 2018/01/09 17:46:36 UT

Marc W. Buie, Southwest Research Institute

RECON