RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-792-033060 with event index number of 100772

Geocentric closest approach at 2018/01/05 08:05:44 UTC

J2000 position of star is 20:31:36.7 +68:21:58
Equinox of date position of star is 20:31:43.8 +68:25:32
Stellar brightness R=15.9, use SENSEUP=128
Star is 97 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=20.3

[RECON map]
TNO is 11.4 AU from the Sun and 11.3 AU from the Earth.
The TNO is moving 31.4 km/sec on the sky relative to the star, or, 13.8 arcsec/hr.
The 1-sigma error in the time of the event is 22 seconds.
The 1-sigma cross-track error in the shadow position is 864 km.
The sky-plane scale is 8199.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.6 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2018/01/05 08:06UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:02.8 +45:20:43  1.3 23.12 119
Alderamin      21:19:00.5 +62:39:44  2.4  7.54 104
PPM 022104     20:20:10.3 +68:56:17  5.5  1.17  96
PPM 022190     20:27:25.8 +68:49:39  8.0  0.56  96
PPM 022233     20:31:49.1 +68:36:39  9.9  0.18  97
342842         20:31:44.1 +68:25:40 15.9        97
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 5.0 sigma about the mid-time.
The median site spacing is 12.9 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
CPSLO 08:04:51 -77.3 Dark Up 15.0 351.6 Really Low 08:02:32 - 08:07:10 5882
Wildwood 08:04:46 -78.5 Dark Up 13.6 352.4 Really Low 08:02:27 - 08:07:05 5872
Idyllwild 08:04:40 -78.5 Dark Up 13.0 353.1 Really Low 08:02:21 - 08:06:59 5834
Calipatria 08:04:37 -78.8 Dark Up 12.3 353.5 Really Low 08:02:18 - 08:06:56 5815
Yuma 08:04:35 -78.9 Dark Up 11.8 353.9 Really Low 08:02:16 - 08:06:54 5800
Lone Pine 08:04:44 -75.9 Dark Up 16.0 352.5 Really Low 08:02:25 - 08:07:03 5781
Blythe 08:04:35 -78.1 Dark Up 12.7 353.8 Really Low 08:02:16 - 08:06:54 5775
Bishop 08:04:45 -75.2 Dark Up 16.8 352.3 Really Low 08:02:26 - 08:07:04 5763
Lee Vining 08:04:47 -74.6 Dark Up 17.5 352.1 Really Low 08:02:28 - 08:07:06 5759
Parker 08:04:34 -77.5 Dark Up 13.2 353.9 Really Low 08:02:15 - 08:06:53 5751
Lake Havasu City 08:04:34 -77.2 Dark Up 13.6 353.9 Really Low 08:02:15 - 08:06:53 5742
Mohave Valley 08:04:35 -76.9 Dark Up 14.0 353.8 Really Low 08:02:16 - 08:06:54 5738
Beatty 08:04:40 -75.5 Dark Up 16.2 353.0 Really Low 08:02:21 - 08:06:59 5738
Gardnerville 08:04:47 -73.7 Dark Up 18.5 351.8 Really Low 08:02:28 - 08:07:06 5736
Searchlight/Boulder City 08:04:35 -76.4 Dark Up 14.6 353.7 Really Low 08:02:16 - 08:06:54 5732
Laughlin/Bullhead City 08:04:35 -76.6 Dark Up 14.3 353.8 Really Low 08:02:16 - 08:06:54 5730
Carson City 08:04:47 -73.4 Dark Up 18.8 351.7 Really Low 08:02:28 - 08:07:06 5728
Hawthorne 08:04:45 -74.0 Dark Up 18.0 352.2 Really Low 08:02:26 - 08:07:04 5727
Quincy 08:04:50 -72.6 Dark Up 19.6 351.3 Really Low 08:02:31 - 08:07:09 5722
Yerington 08:04:47 -73.6 Dark Up 18.5 352.0 Really Low 08:02:28 - 08:07:06 5721
Indian Springs 08:04:37 -75.6 Dark Up 15.8 353.4 Really Low 08:02:18 - 08:06:56 5719
Portola 08:04:50 -72.8 Dark Up 19.5 351.5 Really Low 08:02:31 - 08:07:09 5717
Henderson 08:04:36 -75.9 Dark Up 15.2 353.6 Really Low 08:02:17 - 08:06:55 5716
Kingman/Dolan Springs 08:04:33 -76.4 Dark Up 14.2 354.0 Really Low 08:02:14 - 08:06:52 5715
Reno 08:04:47 -73.1 Dark Up 19.1 351.7 Really Low 08:02:28 - 08:07:06 5714
Greenville 08:04:51 -72.4 Dark Up 19.8 351.3 Really Low 08:02:32 - 08:07:10 5713
Gimple 08:04:50 -72.4 Dark Up 19.8 351.3 Really Low 08:02:31 - 08:07:09 5712
Tonopah 08:04:41 -74.4 Dark Up 17.4 352.7 Really Low 08:02:22 - 08:07:00 5710
Patrick 08:04:33 -76.2 Dark Up 14.4 354.1 Really Low 08:02:14 - 08:06:52 5702
Susanville 08:04:50 -72.2 Dark Up 20.1 351.4 Low 08:02:31 - 08:07:09 5697
DCO 08:04:31 -76.2 Dark Up 14.1 354.3 Really Low 08:02:12 - 08:06:50 5689
Fall River/Burney 08:04:52 -71.5 Dark Up 20.8 351.1 Low 08:02:33 - 08:07:11 5684
Tulelake 08:04:52 -70.6 Dark Up 21.7 351.0 Low 08:02:33 - 08:07:11 5647
Klamath Falls 08:04:52 -70.3 Dark Up 22.0 350.8 Low 08:02:33 - 08:07:11 5641
Cedarville 08:04:49 -71.1 Dark Up 21.1 351.5 Low 08:02:30 - 08:07:08 5641
Chiloquin 08:04:53 -70.0 Dark Up 22.3 350.8 Low 08:02:34 - 08:07:12 5627
Lakeview 08:04:49 -70.4 Dark Up 21.8 351.4 Low 08:02:30 - 08:07:08 5616
Paisley 08:04:49 -69.9 Dark Up 22.3 351.3 Low 08:02:30 - 08:07:08 5597
North Lake 08:04:50 -69.3 Dark Up 22.9 351.1 Low 08:02:31 - 08:07:09 5579
La Pine/Gilchrist 08:04:52 -68.9 Dark Up 23.4 350.8 Low 08:02:33 - 08:07:11 5569
Oregon Observatory 08:04:52 -68.7 Dark Up 23.6 350.9 Low 08:02:33 - 08:07:11 5559
Bend 08:04:51 -68.5 Dark Up 23.8 350.9 Low 08:02:32 - 08:07:10 5548
Sisters 08:04:52 -68.3 Dark Up 24.0 350.8 Low 08:02:33 - 08:07:11 5541
Redmond 08:04:51 -68.3 Dark Up 23.9 350.9 Low 08:02:32 - 08:07:10 5535
Madras/Culver 08:04:50 -67.9 Dark Up 24.3 350.9 Low 08:02:31 - 08:07:09 5517
Maupin 08:04:50 -67.4 Dark Up 24.8 350.9 Low 08:02:31 - 08:07:09 5489
The Dalles 08:04:51 -67.0 Dark Up 25.3 350.8 Low 08:02:32 - 08:07:10 5470
Goldendale 08:04:50 -66.8 Dark Up 25.4 351.0 Low 08:02:31 - 08:07:09 5453
George/Umatilla 08:04:47 -66.7 Dark Up 25.4 351.5 Low 08:02:28 - 08:07:06 5420
Toppenish/White Swan 08:04:48 -66.2 Dark Up 25.9 351.1 Low 08:02:29 - 08:07:07 5417
Yakima 08:04:49 -66.0 Dark Up 26.2 351.0 Low 08:02:30 - 08:07:08 5409
PNWRO 08:04:45 -66.6 Dark Up 25.4 351.7 Low 08:02:26 - 08:07:04 5407
Pasco 08:04:46 -66.3 Dark Up 25.7 351.6 Low 08:02:27 - 08:07:05 5398
Ellensburg 08:04:49 -65.6 Dark Up 26.6 351.0 Low 08:02:30 - 08:07:08 5388
Wenatchee 08:04:49 -65.2 Dark Up 27.0 351.0 Low 08:02:30 - 08:07:08 5362
Entiat 08:04:48 -64.9 Dark Up 27.2 351.0 Low 08:02:29 - 08:07:07 5346
Manson/Chelan 08:04:48 -64.7 Dark Up 27.4 351.1 Low 08:02:29 - 08:07:07 5334
Brewster 08:04:47 -64.5 Dark Up 27.6 351.2 Low 08:02:28 - 08:07:06 5316
Okanogan 08:04:47 -64.2 Dark Up 27.8 351.2 Low 08:02:28 - 08:07:06 5297
Tonasket 08:04:47 -63.9 Dark Up 28.1 351.3 Low 08:02:28 - 08:07:06 5276
Oroville 08:04:47 -63.7 Dark Up 28.4 351.3 Low 08:02:28 - 08:07:06 5263
Niwot 08:04:11 -68.6 Dark Up 18.6 357.2 Really Low 08:01:52 - 08:06:30 5245

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 342842, (2018/01/05 08:06UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 23.12 119
Alderamin      21:18:35.2 +62:35:09  2.4  7.54 104
PPM 022104     20:20:06.0 +68:52:50  5.5  1.17  96
PPM 022190     20:27:20.1 +68:46:02  8.0  0.56  96
PPM 022233     20:31:42.1 +68:32:57  9.9  0.18  97
342842         20:31:36.7 +68:21:58 15.9        97
Positions are for J2000

Event circumstances last updated at 2017/05/17 17:58:57 UT

Marc W. Buie, Southwest Research Institute

RECON