RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-768-053139 with event index number of 166142

Geocentric closest approach at 2018/11/25 06:40:33 UTC

J2000 position of star is 19:56:22.7 +63:34:41
Equinox of date position of star is 19:56:35.7 +63:37:36
Stellar brightness R=15.1, use SENSEUP=128
Star is 92 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 12.1 AU from the Sun and 12.0 AU from the Earth.
The TNO is moving 35.6 km/sec on the sky relative to the star, or, 14.8 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is 664 km.
The sky-plane scale is 8676.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.3 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2018/11/25 06:41UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:04.6 +45:20:55  1.3 19.37 104
Alderamin      21:19:01.7 +62:39:58  2.4  9.32  88
PPM 021877     19:58:42.6 +63:35:10  6.0  0.24  92
PPM 021868     19:58:09.7 +63:29:31  9.3  0.22  92
PPM 021858     19:56:52.8 +63:50:00 11.1  0.21  92
342842         19:56:36.4 +63:37:45 15.1        92
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 14.4 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)
Yuma 06:40:23 -74.4 Dark Up 20.6 333.6 Low 06:37:39 - 06:43:07 4022
Calipatria 06:40:25 -73.6 Dark Up 21.4 333.3 Low 06:37:41 - 06:43:09 3997
Blythe 06:40:21 -73.7 Dark Up 21.4 333.4 Low 06:37:37 - 06:43:05 3986
Parker 06:40:20 -73.5 Dark Up 21.8 333.4 Low 06:37:36 - 06:43:04 3968
Idyllwild 06:40:27 -72.5 Dark Up 22.3 332.9 Low 06:37:43 - 06:43:11 3959
Lake Havasu City 06:40:20 -73.2 Dark Up 22.1 333.3 Low 06:37:36 - 06:43:04 3953
DCO 06:40:16 -73.2 Dark Up 22.3 333.5 Low 06:37:32 - 06:43:00 3937
Mohave Valley 06:40:20 -72.8 Dark Up 22.6 333.2 Low 06:37:36 - 06:43:04 3934
Kingman/Dolan Springs 06:40:19 -72.8 Dark Up 22.7 333.3 Low 06:37:35 - 06:43:03 3926
Laughlin/Bullhead City 06:40:19 -72.5 Dark Up 22.8 333.1 Low 06:37:35 - 06:43:03 3923
Patrick 06:40:18 -72.7 Dark Up 22.8 333.3 Low 06:37:34 - 06:43:02 3918
Wildwood 06:40:30 -71.1 Dark Up 23.4 332.3 Low 06:37:46 - 06:43:14 3918
Searchlight/Boulder City 06:40:20 -72.1 Dark Up 23.2 333.0 Low 06:37:36 - 06:43:04 3907
Henderson 06:40:19 -71.6 Dark Up 23.8 332.8 Low 06:37:35 - 06:43:03 3881
Indian Springs 06:40:20 -70.9 Dark Up 24.5 332.6 Low 06:37:36 - 06:43:04 3850
CPSLO 06:40:33 -69.0 Dark Up 25.2 331.6 Low 06:37:49 - 06:43:17 3834
Beatty 06:40:22 -70.1 Dark Up 25.2 332.2 Low 06:37:38 - 06:43:06 3823
Lone Pine 06:40:25 -69.6 Dark Up 25.4 331.9 Low 06:37:41 - 06:43:09 3820
Bishop 06:40:25 -68.9 Dark Up 26.2 331.7 Low 06:37:41 - 06:43:09 3781
Tonopah 06:40:22 -69.0 Dark Up 26.4 331.8 Low 06:37:38 - 06:43:06 3764
Lee Vining 06:40:26 -68.1 Dark Up 27.0 331.3 Low 06:37:42 - 06:43:10 3742
Hawthorne 06:40:24 -67.9 Dark Up 27.3 331.3 Low 06:37:40 - 06:43:08 3723
Niwot 06:39:53 -70.6 Dark Up 24.0 335.0 Low 06:37:09 - 06:42:37 3708
Yerington 06:40:24 -67.3 Dark Up 27.9 331.1 Low 06:37:40 - 06:43:08 3692
Gardnerville 06:40:26 -67.0 Dark Up 28.1 330.9 Low 06:37:42 - 06:43:10 3685
Carson City 06:40:26 -66.8 Dark Up 28.3 330.8 Low 06:37:42 - 06:43:10 3673
Reno 06:40:25 -66.5 Dark Up 28.6 330.7 Low 06:37:41 - 06:43:09 3655
Portola 06:40:26 -66.0 Dark Up 29.1 330.5 Low 06:37:42 - 06:43:10 3631
Quincy 06:40:27 -65.6 Dark Up 29.4 330.3 Low 06:37:43 - 06:43:11 3616
Gimple 06:40:26 -65.5 Dark Up 29.6 330.3 Low 06:37:42 - 06:43:10 3608
Greenville 06:40:27 -65.5 Dark Up 29.6 330.3 Low 06:37:43 - 06:43:11 3606
Susanville 06:40:26 -65.4 Dark Up 29.7 330.3 Low 06:37:42 - 06:43:10 3597
Fall River/Burney 06:40:26 -64.6 Dark Up 30.5 329.9 Up 06:37:42 - 06:43:10 3552
Cedarville 06:40:23 -64.8 Dark Up 30.5 330.1 Up 06:37:39 - 06:43:07 3548
Lakeview 06:40:22 -64.2 Dark Up 31.1 329.8 Up 06:37:38 - 06:43:06 3510
Tulelake 06:40:25 -63.9 Dark Up 31.4 329.6 Up 06:37:41 - 06:43:09 3503
Klamath Falls 06:40:25 -63.5 Dark Up 31.7 329.4 Up 06:37:41 - 06:43:09 3483
Paisley 06:40:22 -63.7 Dark Up 31.6 329.6 Up 06:37:38 - 06:43:06 3479
Chiloquin 06:40:25 -63.2 Dark Up 32.0 329.3 Up 06:37:41 - 06:43:09 3464
North Lake 06:40:22 -63.2 Dark Up 32.3 329.3 Up 06:37:38 - 06:43:06 3443
La Pine/Gilchrist 06:40:23 -62.5 Dark Up 32.9 329.0 Up 06:37:39 - 06:43:07 3409
Oregon Observatory 06:40:22 -62.4 Dark Up 33.0 329.0 Up 06:37:38 - 06:43:06 3398
Bend 06:40:22 -62.3 Dark Up 33.1 328.9 Up 06:37:38 - 06:43:06 3391
Redmond 06:40:21 -62.2 Dark Up 33.2 328.9 Up 06:37:37 - 06:43:05 3381
Sisters 06:40:22 -62.0 Dark Up 33.4 328.8 Up 06:37:38 - 06:43:06 3373
Madras/Culver 06:40:20 -62.0 Dark Up 33.5 328.8 Up 06:37:36 - 06:43:04 3361
Maupin 06:40:19 -61.5 Dark Up 34.0 328.6 Up 06:37:35 - 06:43:03 3330
PNWRO 06:40:14 -61.7 Dark Up 33.9 329.0 Up 06:37:30 - 06:42:58 3314
George/Umatilla 06:40:15 -61.6 Dark Up 34.0 328.9 Up 06:37:31 - 06:42:59 3313
The Dalles 06:40:19 -61.2 Dark Up 34.4 328.5 Up 06:37:35 - 06:43:03 3304
Goldendale 06:40:18 -61.1 Dark Up 34.4 328.5 Up 06:37:34 - 06:43:02 3297
Pasco 06:40:14 -61.4 Dark Up 34.2 328.9 Up 06:37:30 - 06:42:58 3296
Toppenish/White Swan 06:40:16 -60.8 Dark Up 34.8 328.4 Up 06:37:32 - 06:43:00 3270
Yakima 06:40:16 -60.6 Dark Up 35.0 328.3 Up 06:37:32 - 06:43:00 3254
Ellensburg 06:40:16 -60.3 Dark Up 35.3 328.1 Up 06:37:32 - 06:43:00 3230
Wenatchee 06:40:15 -60.0 Dark Up 35.6 328.0 Up 06:37:31 - 06:42:59 3208
Entiat 06:40:14 -59.8 Dark Up 35.8 328.0 Up 06:37:30 - 06:42:58 3193
Manson/Chelan 06:40:14 -59.7 Dark Up 36.0 327.9 Up 06:37:30 - 06:42:58 3180
Brewster 06:40:13 -59.6 Dark Up 36.0 328.0 Up 06:37:29 - 06:42:57 3172
Okanogan 06:40:12 -59.4 Dark Up 36.2 327.9 Up 06:37:28 - 06:42:56 3158
Tonasket 06:40:11 -59.2 Dark Up 36.4 327.8 Up 06:37:27 - 06:42:55 3138
Oroville 06:40:11 -59.0 Dark Up 36.6 327.7 Up 06:37:27 - 06:42:55 3123

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, (2018/11/25 06:41UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 19.37 104
Alderamin      21:18:35.2 +62:35:09  2.4  9.32  88
PPM 021877     19:58:28.6 +63:32:03  6.0  0.24  92
PPM 021868     19:57:55.6 +63:26:24  9.3  0.22  92
PPM 021858     19:56:39.5 +63:46:55 11.1  0.21  92
342842         19:56:22.7 +63:34:41 15.1        92
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:03:46 UT

Marc W. Buie, Southwest Research Institute

RECON