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 04:37:53 UTC

J2000 position of star is 19:47:12.8 +67:19:15
Equinox of date position of star is 19:47:16.7 +67:21:57
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 28 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 19.5 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 04:38:22 -48.4 Dark Up 50.1 330.8 Up 04:35:30 - 04:41:14 5886
Yuma 04:38:52 -45.6 Dark Up 46.7 336.6 Up 04:36:00 - 04:41:44 5701
DCO 04:38:45 -45.7 Dark Up 48.4 335.1 Up 04:35:53 - 04:41:37 5691
Blythe 04:38:50 -45.3 Dark Up 47.6 336.2 Up 04:35:58 - 04:41:42 5664
Lake Havasu City 04:38:48 -45.1 Dark Up 48.3 335.7 Up 04:35:56 - 04:41:40 5644
Patrick 04:38:45 -45.1 Dark Up 49.0 335.2 Up 04:35:53 - 04:41:37 5632
Kingman/Dolan Springs 04:38:46 -45.0 Dark Up 48.8 335.3 Up 04:35:54 - 04:41:38 5630
Calipatria 04:38:53 -44.7 Dark Up 47.4 336.7 Up 04:36:01 - 04:41:45 5622
Mohave Valley 04:38:48 -44.8 Dark Up 48.7 335.6 Up 04:35:56 - 04:41:40 5610
Searchlight/Boulder City 04:38:47 -44.3 Dark Up 49.4 335.4 Up 04:35:55 - 04:41:39 5561
Henderson 04:38:46 -44.0 Dark Up 49.9 335.2 Up 04:35:54 - 04:41:38 5531
Idyllwild 04:38:53 -43.6 Dark Up 48.4 336.8 Up 04:36:01 - 04:41:45 5517
Indian Springs 04:38:46 -43.2 Dark Up 50.6 335.1 Up 04:35:54 - 04:41:38 5462
Beatty 04:38:47 -42.3 Dark Up 51.3 335.3 Up 04:35:55 - 04:41:39 5377
Lone Pine 04:38:49 -41.5 Dark Up 51.5 335.8 Up 04:35:57 - 04:41:41 5303
Tonopah 04:38:45 -41.5 Dark Up 52.5 334.8 Up 04:35:53 - 04:41:37 5294
Bishop 04:38:48 -40.9 Dark Up 52.3 335.5 Up 04:35:56 - 04:41:40 5248
Hawthorne 04:38:46 -40.3 Dark Up 53.4 335.0 Up 04:35:54 - 04:41:38 5180
Lee Vining 04:38:48 -40.2 Dark Up 53.0 335.4 Up 04:35:56 - 04:41:40 5173
Reno 04:38:45 -39.1 Dark Up 54.7 334.8 Up 04:35:53 - 04:41:37 5056
Quincy 04:38:46 -38.1 Dark Up 55.4 334.9 Up 04:35:54 - 04:41:38 4963
Susanville 04:38:44 -38.1 Dark Up 55.8 334.5 Up 04:35:52 - 04:41:36 4961
Gimple 04:38:45 -38.1 Dark Up 55.6 334.8 Up 04:35:53 - 04:41:37 4960
Greenville 04:38:45 -38.0 Dark Up 55.6 334.8 Up 04:35:53 - 04:41:37 4954
Cedarville 04:38:41 -38.0 Dark Up 56.6 333.6 Up 04:35:49 - 04:41:33 4942
Lakeview 04:38:40 -37.6 Dark Up 57.3 333.2 Up 04:35:48 - 04:41:32 4900
Fall River/Burney 04:38:44 -37.4 Dark Up 56.6 334.4 Up 04:35:52 - 04:41:36 4884
Paisley 04:38:39 -37.3 Dark Up 57.8 333.0 Up 04:35:47 - 04:41:31 4864
Tulelake 04:38:42 -36.9 Dark Up 57.4 333.8 Up 04:35:50 - 04:41:34 4838
North Lake 04:38:38 -36.8 Dark Up 58.4 332.7 Up 04:35:46 - 04:41:30 4815
Klamath Falls 04:38:42 -36.6 Dark Up 57.8 333.7 Up 04:35:50 - 04:41:34 4806
PNWRO 04:38:30 -36.8 Dark Up 60.1 329.8 Up 04:35:38 - 04:41:22 4803
Chiloquin 04:38:41 -36.4 Dark Up 58.1 333.5 Up 04:35:49 - 04:41:33 4785
George/Umatilla 04:38:30 -36.6 Dark Up 60.2 330.0 Up 04:35:38 - 04:41:22 4781
Bend 04:38:37 -36.2 Dark Up 59.3 332.2 Up 04:35:45 - 04:41:29 4751
Oregon Observatory 04:38:37 -36.2 Dark Up 59.1 332.4 Up 04:35:45 - 04:41:29 4751
Goldendale 04:38:33 -35.7 Dark Up 60.6 330.6 Up 04:35:41 - 04:41:25 4696
Toppenish/White Swan 04:38:30 -35.7 Dark Up 61.0 329.9 Up 04:35:38 - 04:41:22 4695
Yakima 04:38:30 -35.5 Dark Up 61.2 329.8 Up 04:35:38 - 04:41:22 4674
Wenatchee 04:38:28 -35.3 Dark Up 61.9 329.0 Up 04:35:36 - 04:41:20 4646
Brewster 04:38:26 -35.3 Dark Up 62.3 328.1 Up 04:35:34 - 04:41:18 4642
Okanogan 04:38:25 -35.3 Dark Up 62.4 327.8 Up 04:35:33 - 04:41:17 4640
Entiat 04:38:27 -35.2 Dark Up 62.0 328.7 Up 04:35:35 - 04:41:19 4639
Manson/Chelan 04:38:27 -35.2 Dark Up 62.2 328.4 Up 04:35:35 - 04:41:19 4632
Tonasket 04:38:24 -35.2 Dark Up 62.6 327.4 Up 04:35:32 - 04:41:16 4631
Oroville 04:38:23 -35.1 Dark Up 62.8 327.1 Up 04:35:31 - 04:41:15 4618
Ellensburg 04:38:29 -35.3 Dark Up 61.6 329.4 Up 04:35:37 - 04:41:21 -4654
The Dalles 04:38:33 -35.6 Dark Up 60.6 330.9 Up 04:35:41 - 04:41:25 -4685
Maupin 04:38:34 -35.8 Dark Up 60.2 331.2 Up 04:35:42 - 04:41:26 -4712
Sisters 04:38:37 -35.9 Dark Up 59.6 332.1 Up 04:35:45 - 04:41:29 -4723
Madras/Culver 04:38:35 -36.1 Dark Up 59.7 331.7 Up 04:35:43 - 04:41:27 -4736
Redmond 04:38:36 -36.2 Dark Up 59.4 332.0 Up 04:35:44 - 04:41:28 -4750
La Pine/Gilchrist 04:38:38 -36.2 Dark Up 59.0 332.6 Up 04:35:46 - 04:41:30 -4757
Pasco 04:38:29 -36.6 Dark Up 60.4 329.6 Up 04:35:37 - 04:41:21 -4777
Portola 04:38:45 -38.5 Dark Up 55.2 334.8 Up 04:35:53 - 04:41:37 -5001
Carson City 04:38:46 -39.2 Dark Up 54.4 335.0 Up 04:35:54 - 04:41:38 -5073
Gardnerville 04:38:46 -39.3 Dark Up 54.1 335.1 Up 04:35:54 - 04:41:38 -5087
Yerington 04:38:45 -39.7 Dark Up 54.0 334.9 Up 04:35:53 - 04:41:37 -5124
CPSLO 04:38:55 -40.0 Dark Up 51.1 337.3 Up 04:36:03 - 04:41:47 -5177
Wildwood 04:38:55 -42.0 Dark Up 49.3 337.2 Up 04:36:03 - 04:41:47 -5371
Laughlin/Bullhead City 04:38:47 -44.6 Dark Up 49.0 335.5 Up 04:35:55 - 04:41:39 -5597
Parker 04:38:48 -45.3 Dark Up 48.0 335.9 Up 04:35:56 - 04:41:40 -5661

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     19:44:18.6 +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 2017/12/05 19:00:02 UT

Marc W. Buie, Southwest Research Institute

RECON