RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-653-026942 with event index number of 216335

Geocentric closest approach at 2019/10/26 03:57:59 UTC

J2000 position of star is 05:00:04.5 +40:34:34
Equinox of date position of star is 05:01:19.8 +40:36:07
Stellar brightness R=16.0, use SENSEUP=128
Star is 104 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 16.1 AU from the Sun and 15.4 AU from the Earth.
The TNO is moving 15.0 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 632 seconds.
The 1-sigma cross-track error in the shadow position is 4963 km.
The sky-plane scale is 11202.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.0 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2019/10/26 03:58UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.6 +16:32:52  0.8 24.63 115
3Iot Aur       04:58:17.2 +33:11:44  2.7  7.44 107
8Zet Aur       05:03:52.0 +41:06:10  3.8  0.68 104
PPM 047586     05:01:42.0 +40:21:33  8.1  0.25 104
PPM 047600     05:02:20.8 +40:40:10 11.0  0.18 104
248835         05:01:27.3 +40:36:16 16.0       104
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 1.4 sigma about the mid-time.
The median site spacing is 8.2 km RECON observability=0.4 and success probability=6.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:02:48 -32.1 Dark Down 24.1 55.1 Low 03:47:48 - 04:17:48 3226
Tonasket 04:02:49 -32.2 Dark Down 24.0 55.1 Low 03:47:49 - 04:17:49 3214
Manson/Chelan 04:02:53 -32.0 Dark Down 23.1 54.4 Low 03:47:53 - 04:17:53 3207
Okanogan 04:02:51 -32.2 Dark Down 23.7 54.8 Low 03:47:51 - 04:17:51 3204
Brewster 04:02:52 -32.2 Dark Down 23.4 54.6 Low 03:47:52 - 04:17:52 3200
Entiat 04:02:54 -32.0 Dark Down 22.9 54.2 Low 03:47:54 - 04:17:54 3199
Wenatchee 04:02:55 -32.1 Dark Down 22.7 54.1 Low 03:47:55 - 04:17:55 3191
Ellensburg 04:02:57 -32.0 Dark Down 22.4 53.8 Low 03:47:57 - 04:17:57 3181
Yakima 04:02:59 -32.2 Dark Down 22.1 53.7 Low 03:47:59 - 04:17:59 3161
Toppenish/White Swan 04:03:01 -32.3 Dark Down 22.1 53.7 Low 03:48:01 - 04:18:01 3141
The Dalles 04:03:04 -32.0 Dark Down 21.2 53.0 Low 03:48:04 - 04:18:04 3140
Goldendale 04:03:03 -32.2 Dark Down 21.5 53.3 Low 03:48:03 - 04:18:03 3133
Maupin 04:03:06 -32.2 Dark Down 21.0 53.0 Low 03:48:06 - 04:18:06 3112
Sisters 04:03:10 -32.1 Dark Down 20.2 52.5 Low 03:48:10 - 04:18:10 3090
Madras/Culver 04:03:09 -32.4 Dark Down 20.7 52.8 Low 03:48:09 - 04:18:09 3085
Pasco 04:03:02 -33.2 Dark Down 22.7 54.4 Low 03:48:02 - 04:18:02 3071
Redmond 04:03:10 -32.4 Dark Down 20.4 52.7 Low 03:48:10 - 04:18:10 3068
George/Umatilla 04:03:04 -33.2 Dark Down 22.4 54.2 Low 03:48:04 - 04:18:04 3064
Bend 04:03:12 -32.4 Dark Down 20.2 52.5 Low 03:48:12 - 04:18:12 3064
Oregon Observatory 04:03:12 -32.3 Dark Down 20.0 52.4 Low 03:48:12 - 04:18:12 3061
La Pine/Gilchrist 04:03:13 -32.4 Dark Down 19.9 52.3 Really Low 03:48:13 - 04:18:13 3053
PNWRO 04:03:03 -33.4 Dark Down 22.7 54.4 Low 03:48:03 - 04:18:03 3046
Chiloquin 04:03:18 -32.4 Dark Down 19.0 51.8 Really Low 03:48:18 - 04:18:18 3010
North Lake 04:03:16 -32.9 Dark Down 20.0 52.5 Really Low 03:48:16 - 04:18:16 2997
Klamath Falls 04:03:20 -32.5 Dark Down 18.8 51.8 Really Low 03:48:20 - 04:18:20 2987
Tulelake 04:03:21 -32.8 Dark Down 18.9 51.9 Really Low 03:48:21 - 04:18:21 2955
Paisley 04:03:19 -33.3 Dark Down 19.8 52.6 Really Low 03:48:19 - 04:18:19 2947
Lakeview 04:03:21 -33.6 Dark Down 19.7 52.5 Really Low 03:48:21 - 04:18:21 2908
Fall River/Burney 04:03:26 -33.1 Dark Down 18.3 51.7 Really Low 03:48:26 - 04:18:26 2899
Cedarville 04:03:24 -33.9 Dark Down 19.4 52.4 Really Low 03:48:24 - 04:18:24 2860
Greenville 04:03:30 -33.7 Dark Down 18.1 51.7 Really Low 03:48:30 - 04:18:30 2821
Susanville 04:03:29 -33.8 Dark Down 18.4 51.9 Really Low 03:48:29 - 04:18:29 2821
Gimple 04:03:30 -33.7 Dark Down 18.1 51.7 Really Low 03:48:30 - 04:18:30 2817
Quincy 04:03:31 -33.7 Dark Down 17.9 51.6 Really Low 03:48:31 - 04:18:31 2809
Portola 04:03:32 -34.1 Dark Down 18.2 51.8 Really Low 03:48:32 - 04:18:32 2775
Reno 04:03:34 -34.7 Dark Down 18.4 52.1 Really Low 03:48:34 - 04:18:34 2723
Carson City 04:03:35 -34.8 Dark Down 18.2 52.0 Really Low 03:48:35 - 04:18:35 2700
Gardnerville 04:03:37 -34.9 Dark Down 18.1 52.0 Really Low 03:48:37 - 04:18:37 2682
Yerington 04:03:37 -35.3 Dark Down 18.5 52.3 Really Low 03:48:37 - 04:18:37 2652
Hawthorne 04:03:39 -35.8 Dark Down 18.5 52.4 Really Low 03:48:39 - 04:18:39 2593
Lee Vining 04:03:41 -35.6 Dark Down 17.9 52.0 Really Low 03:48:41 - 04:18:41 2585
CPSLO 04:03:51 -34.9 Dark Down 15.3 50.7 Really Low 03:48:51 - 04:18:51 2506
Bishop 04:03:44 -36.3 Dark Down 18.0 52.2 Really Low 03:48:44 - 04:18:44 2506
Tonopah 04:03:42 -37.0 Dark Down 19.1 52.9 Really Low 03:48:42 - 04:18:42 2483
Lone Pine 04:03:48 -36.7 Dark Down 17.7 52.2 Really Low 03:48:48 - 04:18:48 2437
Beatty 04:03:47 -37.7 Dark Down 18.7 52.8 Really Low 03:48:47 - 04:18:47 2381
Wildwood 04:03:57 -36.8 Dark Down 15.8 51.4 Really Low 03:48:57 - 04:18:57 2304
Indian Springs 04:03:49 -38.6 Dark Down 19.2 53.2 Really Low 03:48:49 - 04:18:49 2296
Henderson 04:03:52 -39.3 Dark Down 19.4 53.3 Really Low 03:48:52 - 04:18:52 2220
Searchlight/Boulder City 04:03:54 -39.5 Dark Down 19.1 53.2 Really Low 03:48:54 - 04:18:54 2177
Idyllwild 04:04:00 -38.5 Dark Down 16.9 52.1 Really Low 03:49:00 - 04:19:00 2166
Laughlin/Bullhead City 04:03:55 -39.8 Dark Down 19.1 53.3 Really Low 03:48:55 - 04:18:55 2136
Mohave Valley 04:03:56 -39.9 Dark Down 19.0 53.2 Really Low 03:48:56 - 04:18:56 2117
Patrick 04:03:54 -40.3 Dark Down 19.7 53.6 Really Low 03:48:54 - 04:18:54 2111
Kingman/Dolan Springs 04:03:56 -40.2 Dark Down 19.5 53.5 Really Low 03:48:56 - 04:18:56 2107
Lake Havasu City 04:03:58 -40.2 Dark Down 18.9 53.2 Really Low 03:48:58 - 04:18:58 2074
Calipatria 04:04:03 -39.6 Dark Down 17.3 52.4 Really Low 03:49:03 - 04:19:03 2051
Parker 04:04:00 -40.3 Dark Down 18.7 53.1 Really Low 03:49:00 - 04:19:00 2048
DCO 04:03:56 -41.0 Dark Down 20.0 53.8 Low 03:48:56 - 04:18:56 2047
Blythe 04:04:01 -40.2 Dark Down 18.2 52.9 Really Low 03:49:01 - 04:19:01 2029
Yuma 04:04:05 -40.4 Dark Down 17.6 52.6 Really Low 03:49:05 - 04:19:05 1966
Niwot 04:03:32 -45.0 Dark Down 28.0 59.0 Low 03:48:32 - 04:18:32 1945

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 248835, (2019/10/26 03:58UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 24.63 115
3Iot Aur       04:56:59.6 +33:09:58  2.7  7.44 107
8Zet Aur       05:02:28.7 +41:04:33  3.8  0.68 104
PPM 047586     05:00:19.4 +40:19:52  8.1  0.25 104
PPM 047600     05:00:57.9 +40:38:30 11.0  0.18 104
248835         05:00:04.5 +40:34:34 16.0       104
Positions are for J2000

Event circumstances last updated at 2018/01/09 17:47:55 UT

Marc W. Buie, Southwest Research Institute

RECON