RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-667-025918 with event index number of 155122

Geocentric closest approach at 2018/10/20 07:44:05 UTC

J2000 position of star is 04:30:55.4 +43:16:45
Equinox of date position of star is 04:32:10.0 +43:18:57
Stellar brightness R=16.3, use SENSEUP=128
Star is 98 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 15.4 AU from the Sun and 14.8 AU from the Earth.
The TNO is moving 14.8 km/sec on the sky relative to the star, or, 5.0 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 3901 km.
The sky-plane scale is 10717.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.1 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2018/10/20 07:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.1 +16:32:44  0.8 26.79  94
3Iot Aur       04:58:13.3 +33:11:39  2.7 11.33 101
59 Per         04:44:14.6 +43:23:57  5.2  2.18 100
PPM 047168     04:34:41.3 +43:04:12  7.1  0.51  98
PPM 047119     04:31:46.8 +43:20:26  9.6  0.09  98
248835         04:32:15.1 +43:19:06 16.3        98
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 23.5 km RECON observability=1.0 and success probability=11.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:47:22 -51.4 Dark Up 61.0 85.3 Up 07:32:22 - 08:02:22 3476
Tonasket 07:47:23 -51.6 Dark Up 61.0 84.9 Up 07:32:23 - 08:02:23 3452
Okanogan 07:47:24 -52.0 Dark Up 60.8 84.2 Up 07:32:24 - 08:02:24 3423
Brewster 07:47:26 -52.3 Dark Up 60.7 83.6 Up 07:32:26 - 08:02:26 3402
Manson/Chelan 07:47:28 -52.5 Dark Up 60.4 83.0 Up 07:32:28 - 08:02:28 3392
Entiat 07:47:29 -52.7 Dark Up 60.4 82.6 Up 07:32:29 - 08:02:29 3372
Wenatchee 07:47:30 -52.9 Dark Up 60.3 82.1 Up 07:32:30 - 08:02:30 3349
Ellensburg 07:47:33 -53.4 Dark Up 60.1 81.2 Up 07:32:33 - 08:02:33 3315
Yakima 07:47:34 -53.8 Dark Up 60.0 80.5 Up 07:32:34 - 08:02:34 3274
Toppenish/White Swan 07:47:34 -54.0 Dark Up 60.1 80.3 Up 07:32:34 - 08:02:34 3247
Goldendale 07:47:38 -54.5 Dark Up 59.7 79.1 Up 07:32:38 - 08:02:38 3205
Pasco 07:47:29 -54.1 Dark Up 60.9 80.7 Up 07:32:29 - 08:02:29 3196
The Dalles 07:47:39 -54.8 Dark Up 59.4 78.6 Up 07:32:39 - 08:02:39 3194
George/Umatilla 07:47:31 -54.4 Dark Up 60.7 80.0 Up 07:32:31 - 08:02:31 3169
PNWRO 07:47:29 -54.3 Dark Up 61.0 80.4 Up 07:32:29 - 08:02:29 3164
Maupin 07:47:41 -55.2 Dark Up 59.4 77.9 Up 07:32:41 - 08:02:41 3149
Madras/Culver 07:47:42 -55.7 Dark Up 59.2 77.0 Up 07:32:42 - 08:02:42 3096
Sisters 07:47:45 -56.1 Dark Up 58.9 76.3 Up 07:32:45 - 08:02:45 3077
Redmond 07:47:44 -56.1 Dark Up 59.1 76.4 Up 07:32:44 - 08:02:44 3061
Bend 07:47:45 -56.3 Dark Up 59.0 76.0 Up 07:32:45 - 08:02:45 3044
Oregon Observatory 07:47:46 -56.5 Dark Up 58.8 75.7 Up 07:32:46 - 08:02:46 3031
La Pine/Gilchrist 07:47:47 -56.7 Dark Up 58.8 75.3 Up 07:32:47 - 08:02:47 3013
North Lake 07:47:45 -57.1 Dark Up 59.1 74.8 Up 07:32:45 - 08:02:45 2949
Chiloquin 07:47:52 -57.8 Dark Up 58.2 73.4 Up 07:32:52 - 08:02:52 2913
Paisley 07:47:46 -57.7 Dark Up 59.2 74.1 Up 07:32:46 - 08:02:46 2881
Klamath Falls 07:47:53 -58.1 Dark Up 58.2 72.9 Up 07:32:53 - 08:02:53 2876
Tulelake 07:47:52 -58.4 Dark Up 58.3 72.6 Up 07:32:52 - 08:02:52 2838
Lakeview 07:47:46 -58.2 Dark Up 59.2 73.3 Up 07:32:46 - 08:02:46 2823
Cedarville 07:47:48 -58.8 Dark Up 59.1 72.3 Up 07:32:48 - 08:02:48 2751
Fall River/Burney 07:47:55 -59.3 Dark Up 58.1 71.3 Up 07:32:55 - 08:02:55 2744
Susanville 07:47:53 -59.9 Dark Up 58.4 70.5 Up 07:32:53 - 08:02:53 2654
Greenville 07:47:55 -60.2 Dark Up 58.1 70.0 Up 07:32:55 - 08:02:55 2637
Gimple 07:47:55 -60.2 Dark Up 58.2 70.0 Up 07:32:55 - 08:02:55 2633
Quincy 07:47:56 -60.4 Dark Up 58.1 69.7 Up 07:32:56 - 08:02:56 2616
Portola 07:47:54 -60.5 Dark Up 58.3 69.6 Up 07:32:54 - 08:02:54 2586
Reno 07:47:52 -60.8 Dark Up 58.7 69.3 Up 07:32:52 - 08:02:52 2537
Carson City 07:47:53 -61.2 Dark Up 58.6 68.8 Up 07:32:53 - 08:02:53 2500
Gardnerville 07:47:53 -61.4 Dark Up 58.6 68.4 Up 07:32:53 - 08:02:53 2473
Yerington 07:47:50 -61.3 Dark Up 59.0 68.6 Up 07:32:50 - 08:02:50 2458
Hawthorne 07:47:49 -61.8 Dark Up 59.2 67.9 Up 07:32:49 - 08:02:49 2393
Lee Vining 07:47:53 -62.4 Dark Up 58.6 67.0 Up 07:32:53 - 08:02:53 2352
Tonopah 07:47:43 -62.1 Dark Up 60.0 67.3 Up 07:32:43 - 08:02:43 2298
Bishop 07:47:50 -62.9 Dark Up 58.9 66.2 Up 07:32:50 - 08:02:50 2266
Niwot 07:46:39 -57.3 Dark Up 69.3 72.1 Up 07:31:39 - 08:01:39 2188
Lone Pine 07:47:51 -63.6 Dark Up 58.8 65.0 Up 07:32:51 - 08:02:51 2176
Beatty 07:47:44 -63.2 Dark Up 59.9 65.5 Up 07:32:44 - 08:02:44 2163
CPSLO 07:48:06 -65.0 Dark Up 56.4 63.1 Up 07:33:06 - 08:03:06 2136
Indian Springs 07:47:39 -63.4 Dark Up 60.5 65.0 Up 07:32:39 - 08:02:39 2095
Henderson 07:47:37 -63.8 Dark Up 60.8 64.2 Up 07:32:37 - 08:02:37 2017
Searchlight/Boulder City 07:47:38 -64.3 Dark Up 60.6 63.2 Up 07:32:38 - 08:02:38 1956
Wildwood 07:47:59 -66.2 Dark Up 57.4 61.4 Up 07:32:59 - 08:02:59 1938
Patrick 07:47:32 -64.2 Dark Up 61.3 63.1 Up 07:32:32 - 08:02:32 1917
Laughlin/Bullhead City 07:47:36 -64.6 Dark Up 60.7 62.7 Up 07:32:36 - 08:02:36 1914
Kingman/Dolan Springs 07:47:34 -64.4 Dark Up 61.1 62.7 Up 07:32:34 - 08:02:34 1900
Mohave Valley 07:47:37 -64.8 Dark Up 60.6 62.3 Up 07:32:37 - 08:02:37 1885
DCO 07:47:29 -64.3 Dark Up 61.7 62.5 Up 07:32:29 - 08:02:29 1863
Lake Havasu City 07:47:36 -65.2 Dark Up 60.6 61.6 Up 07:32:36 - 08:02:36 1836
Idyllwild 07:47:50 -66.3 Dark Up 58.5 60.8 Up 07:32:50 - 08:02:50 1836
Parker 07:47:37 -65.5 Dark Up 60.4 61.1 Up 07:32:37 - 08:02:37 1798
Blythe 07:47:40 -66.1 Dark Up 60.0 60.3 Up 07:32:40 - 08:02:40 1754
Calipatria 07:47:45 -66.7 Dark Up 59.1 59.8 Up 07:32:45 - 08:02:45 1733
Yuma 07:47:42 -67.0 Dark Up 59.5 59.0 Up 07:32:42 - 08:02:42 1659

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, (2018/10/20 07:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.79  94
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.33 101
59 Per         04:42:54.3 +43:21:54  5.2  2.18 100
PPM 047168     04:33:21.7 +43:01:54  7.1  0.51  98
PPM 047119     04:30:27.1 +43:18:04  9.6  0.09  98
248835         04:30:55.4 +43:16:45 16.3        98
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:57:57 UT

Marc W. Buie, Southwest Research Institute

RECON