RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-787-029954 with event index number of 155674

Geocentric closest approach at 2018/10/18 04:37:58 UTC

J2000 position of star is 19:47:12.8 +67:19:15
Equinox of date position of star is 19:47:16.5 +67:21:52
Stellar brightness R=16.2, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 12.0 AU from the Sun and 11.8 AU from the Earth.
The TNO is moving 37.5 km/sec on the sky relative to the star, or, 15.8 arcsec/hr.
The 1-sigma error in the time of the event is 29 seconds.
The 1-sigma cross-track error in the shadow position is 428 km.
The sky-plane scale is 8558.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.2 sec chord
Diameter=34.0 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2018/10/18 04:38UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:04.4 +45:20:54  1.3 23.17  64
Alderamin      21:19:01.6 +62:39:56  2.4 10.68  81
PPM 021724     19:44:16.5 +69:22:59  5.9  2.03  89
PPM 021745     19:46:05.0 +67:47:06  7.9  0.43  87
PPM 021764     19:47:32.8 +67:19:54  9.4  0.04  86
342842         19:47:16.9 +67:22:04 16.2        87
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 26.6 km RECON observability=1.0 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)
Niwot 04:38:26 -48.4 Dark Up 50.1 330.8 Up 04:35:34 - 04:41:19 5918
DCO 04:38:48 -45.7 Dark Up 48.4 335.1 Up 04:35:56 - 04:41:41 5726
Blythe 04:38:54 -45.3 Dark Up 47.6 336.2 Up 04:36:01 - 04:41:46 5699
Patrick 04:38:49 -45.1 Dark Up 49.0 335.2 Up 04:35:57 - 04:41:42 5667
Calipatria 04:38:56 -44.7 Dark Up 47.4 336.7 Up 04:36:04 - 04:41:49 5658
Mohave Valley 04:38:51 -44.8 Dark Up 48.7 335.6 Up 04:35:59 - 04:41:44 5645
Henderson 04:38:50 -44.0 Dark Up 49.9 335.2 Up 04:35:57 - 04:41:42 5566
Indian Springs 04:38:49 -43.2 Dark Up 50.6 335.1 Up 04:35:57 - 04:41:42 5498
Beatty 04:38:50 -42.3 Dark Up 51.3 335.2 Up 04:35:58 - 04:41:43 5412
Wildwood 04:38:59 -42.0 Dark Up 49.3 337.2 Up 04:36:06 - 04:41:51 5408
Lone Pine 04:38:53 -41.5 Dark Up 51.4 335.8 Up 04:36:00 - 04:41:45 5339
Tonopah 04:38:48 -41.5 Dark Up 52.5 334.8 Up 04:35:56 - 04:41:41 5331
Bishop 04:38:52 -41.0 Dark Up 52.3 335.5 Up 04:35:59 - 04:41:44 5284
Hawthorne 04:38:50 -40.3 Dark Up 53.4 335.0 Up 04:35:57 - 04:41:42 5216
Lee Vining 04:38:52 -40.2 Dark Up 53.0 335.4 Up 04:35:59 - 04:41:44 5209
Yerington 04:38:49 -39.8 Dark Up 54.0 334.9 Up 04:35:57 - 04:41:42 5160
Gardnerville 04:38:50 -39.4 Dark Up 54.1 335.1 Up 04:35:58 - 04:41:43 5124
Reno 04:38:49 -39.1 Dark Up 54.7 334.8 Up 04:35:57 - 04:41:42 5092
Portola 04:38:49 -38.5 Dark Up 55.2 334.8 Up 04:35:57 - 04:41:42 5037
Gimple 04:38:49 -38.1 Dark Up 55.6 334.8 Up 04:35:57 - 04:41:42 4996
Greenville 04:38:49 -38.0 Dark Up 55.6 334.8 Up 04:35:57 - 04:41:42 4990
Cedarville 04:38:45 -38.0 Dark Up 56.6 333.6 Up 04:35:52 - 04:41:37 4978
Fall River/Burney 04:38:48 -37.4 Dark Up 56.6 334.4 Up 04:35:55 - 04:41:40 4920
Tulelake 04:38:46 -37.0 Dark Up 57.4 333.8 Up 04:35:53 - 04:41:38 4873
George/Umatilla 04:38:34 -36.6 Dark Up 60.2 330.0 Up 04:35:41 - 04:41:26 4814
Redmond 04:38:40 -36.2 Dark Up 59.4 332.0 Up 04:35:48 - 04:41:33 4784
Madras/Culver 04:38:39 -36.1 Dark Up 59.7 331.7 Up 04:35:47 - 04:41:32 4770
The Dalles 04:38:37 -35.6 Dark Up 60.6 330.9 Up 04:35:45 - 04:41:30 4719
Yakima 04:38:34 -35.5 Dark Up 61.2 329.8 Up 04:35:41 - 04:41:26 4707
Ellensburg 04:38:33 -35.4 Dark Up 61.6 329.4 Up 04:35:41 - 04:41:26 4688
Wenatchee 04:38:32 -35.3 Dark Up 61.8 329.0 Up 04:35:40 - 04:41:25 4679
Brewster 04:38:30 -35.3 Dark Up 62.2 328.1 Up 04:35:37 - 04:41:22 4675
Okanogan 04:38:30 -35.3 Dark Up 62.4 327.8 Up 04:35:37 - 04:41:22 4672
Entiat 04:38:31 -35.2 Dark Up 62.0 328.7 Up 04:35:39 - 04:41:24 4672
Manson/Chelan 04:38:31 -35.2 Dark Up 62.2 328.4 Up 04:35:38 - 04:41:23 4665
Tonasket 04:38:28 -35.2 Dark Up 62.6 327.4 Up 04:35:36 - 04:41:21 4663
Oroville 04:38:28 -35.1 Dark Up 62.8 327.1 Up 04:35:35 - 04:41:20 4650
Toppenish/White Swan 04:38:34 -35.7 Dark Up 61.0 329.9 Up 04:35:42 - 04:41:27 -4728
Goldendale 04:38:36 -35.7 Dark Up 60.6 330.6 Up 04:35:43 - 04:41:28 -4730
Maupin 04:38:38 -35.9 Dark Up 60.2 331.2 Up 04:35:45 - 04:41:30 -4746
Sisters 04:38:40 -35.9 Dark Up 59.6 332.1 Up 04:35:48 - 04:41:33 -4758
Oregon Observatory 04:38:41 -36.2 Dark Up 59.1 332.4 Up 04:35:48 - 04:41:33 -4786
Bend 04:38:41 -36.2 Dark Up 59.3 332.2 Up 04:35:48 - 04:41:33 -4786
La Pine/Gilchrist 04:38:42 -36.2 Dark Up 59.0 332.6 Up 04:35:49 - 04:41:34 -4792
Pasco 04:38:33 -36.6 Dark Up 60.4 329.6 Up 04:35:40 - 04:41:25 -4810
Chiloquin 04:38:44 -36.4 Dark Up 58.1 333.5 Up 04:35:52 - 04:41:37 -4820
PNWRO 04:38:33 -36.8 Dark Up 60.1 329.8 Up 04:35:41 - 04:41:26 -4836
Klamath Falls 04:38:45 -36.6 Dark Up 57.8 333.7 Up 04:35:53 - 04:41:38 -4841
North Lake 04:38:42 -36.8 Dark Up 58.4 332.7 Up 04:35:49 - 04:41:34 -4851
Paisley 04:38:43 -37.3 Dark Up 57.8 333.0 Up 04:35:51 - 04:41:36 -4900
Lakeview 04:38:44 -37.6 Dark Up 57.3 333.2 Up 04:35:51 - 04:41:36 -4936
Susanville 04:38:48 -38.1 Dark Up 55.8 334.5 Up 04:35:55 - 04:41:40 -4997
Quincy 04:38:50 -38.1 Dark Up 55.4 334.9 Up 04:35:57 - 04:41:42 -4999
Carson City 04:38:50 -39.2 Dark Up 54.4 335.0 Up 04:35:57 - 04:41:42 -5110
CPSLO 04:38:59 -40.0 Dark Up 51.1 337.3 Up 04:36:07 - 04:41:52 -5214
Idyllwild 04:38:57 -43.6 Dark Up 48.4 336.8 Up 04:36:04 - 04:41:49 -5553
Searchlight/Boulder City 04:38:51 -44.3 Dark Up 49.4 335.4 Up 04:35:58 - 04:41:43 -5597
Laughlin/Bullhead City 04:38:51 -44.6 Dark Up 49.0 335.5 Up 04:35:58 - 04:41:43 -5632
Kingman/Dolan Springs 04:38:50 -45.0 Dark Up 48.8 335.3 Up 04:35:57 - 04:41:42 -5665
Lake Havasu City 04:38:51 -45.1 Dark Up 48.3 335.7 Up 04:35:59 - 04:41:44 -5679
Parker 04:38:52 -45.3 Dark Up 47.9 335.9 Up 04:36:00 - 04:41:45 -5696
Yuma 04:38:56 -45.6 Dark Up 46.7 336.6 Up 04:36:03 - 04:41:48 -5736

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, (2018/10/18 04:38UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 23.17  64
Alderamin      21:18:35.2 +62:35:09  2.4 10.68  81
PPM 021724     19:44:18.5 +69:20:14  5.9  2.03  89
PPM 021745     19:46:02.2 +67:44:18  7.9  0.43  87
PPM 021764     19:47:28.6 +67:17:04  9.4  0.04  86
342842         19:47:12.8 +67:19:15 16.2        86
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:04:26 UT

Marc W. Buie, Southwest Research Institute

RECON