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 07:30:52 UTC

J2000 position of star is 04:30:55.4 +43:16:45
Equinox of date position of star is 04:32:12.2 +43:19:01
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 217 seconds.
The 1-sigma cross-track error in the shadow position is 1451 km.
The sky-plane scale is 10717.8 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 07:31UT)
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 4.2 sigma about the mid-time.
The median site spacing is 23.0 km RECON observability=1.0 and success probability=32.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:34:20 -51.4 Dark Up 58.9 83.2 Up 07:19:20 - 07:49:20 238
Tonasket 07:34:21 -51.6 Dark Up 58.8 82.8 Up 07:19:21 - 07:49:21 215
Okanogan 07:34:23 -51.9 Dark Up 58.7 82.2 Up 07:19:23 - 07:49:23 187
Brewster 07:34:24 -52.2 Dark Up 58.5 81.6 Up 07:19:24 - 07:49:24 166
Manson/Chelan 07:34:26 -52.4 Dark Up 58.3 81.1 Up 07:19:26 - 07:49:26 158
Entiat 07:34:27 -52.6 Dark Up 58.2 80.7 Up 07:19:27 - 07:49:27 139
Wenatchee 07:34:28 -52.9 Dark Up 58.1 80.2 Up 07:19:28 - 07:49:28 117
Ellensburg 07:34:31 -53.3 Dark Up 57.9 79.5 Up 07:19:31 - 07:49:31 84
Yakima 07:34:32 -53.7 Dark Up 57.8 78.8 Up 07:19:32 - 07:49:32 44
Toppenish/White Swan 07:34:32 -53.9 Dark Up 57.8 78.6 Up 07:19:32 - 07:49:32 17
Goldendale 07:34:36 -54.4 Dark Up 57.5 77.5 Up 07:19:36 - 07:49:36 -23
The Dalles 07:34:38 -54.6 Dark Up 57.2 77.0 Up 07:19:38 - 07:49:38 -32
Pasco 07:34:28 -54.1 Dark Up 58.7 79.0 Up 07:19:28 - 07:49:28 -37
George/Umatilla 07:34:30 -54.4 Dark Up 58.5 78.4 Up 07:19:30 - 07:49:30 -63
PNWRO 07:34:28 -54.3 Dark Up 58.8 78.7 Up 07:19:28 - 07:49:28 -69
Maupin 07:34:39 -55.0 Dark Up 57.1 76.4 Up 07:19:39 - 07:49:39 -77
Madras/Culver 07:34:41 -55.6 Dark Up 57.0 75.6 Up 07:19:41 - 07:49:41 -129
Sisters 07:34:44 -55.9 Dark Up 56.6 74.9 Up 07:19:44 - 07:49:44 -146
Redmond 07:34:42 -55.9 Dark Up 56.9 75.0 Up 07:19:42 - 07:49:42 -163
Bend 07:34:43 -56.1 Dark Up 56.7 74.7 Up 07:19:43 - 07:49:43 -179
Oregon Observatory 07:34:45 -56.3 Dark Up 56.6 74.4 Up 07:19:45 - 07:49:45 -191
La Pine/Gilchrist 07:34:45 -56.5 Dark Up 56.5 74.0 Up 07:19:45 - 07:49:45 -209
North Lake 07:34:44 -57.0 Dark Up 56.8 73.6 Up 07:19:44 - 07:49:44 -274
Chiloquin 07:34:50 -57.6 Dark Up 55.9 72.3 Up 07:19:50 - 07:49:50 -306
Paisley 07:34:45 -57.5 Dark Up 56.9 73.0 Up 07:19:45 - 07:49:45 -341
Klamath Falls 07:34:51 -57.9 Dark Up 55.9 71.9 Up 07:19:51 - 07:49:51 -342
Tulelake 07:34:51 -58.2 Dark Up 56.0 71.6 Up 07:19:51 - 07:49:51 -380
Lakeview 07:34:45 -58.1 Dark Up 56.9 72.3 Up 07:19:45 - 07:49:45 -398
Cedarville 07:34:47 -58.7 Dark Up 56.8 71.4 Up 07:19:47 - 07:49:47 -470
Fall River/Burney 07:34:53 -59.1 Dark Up 55.8 70.4 Up 07:19:53 - 07:49:53 -473
Susanville 07:34:52 -59.8 Dark Up 56.1 69.7 Up 07:19:52 - 07:49:52 -563
Greenville 07:34:54 -60.1 Dark Up 55.8 69.2 Up 07:19:54 - 07:49:54 -580
Gimple 07:34:54 -60.1 Dark Up 55.8 69.2 Up 07:19:54 - 07:49:54 -583
Quincy 07:34:55 -60.3 Dark Up 55.7 68.9 Up 07:19:55 - 07:49:55 -600
Portola 07:34:53 -60.4 Dark Up 56.0 68.9 Up 07:19:53 - 07:49:53 -631
Reno 07:34:51 -60.7 Dark Up 56.4 68.7 Up 07:19:51 - 07:49:51 -681
Carson City 07:34:52 -61.1 Dark Up 56.3 68.2 Up 07:19:52 - 07:49:52 -718
Gardnerville 07:34:52 -61.3 Dark Up 56.2 67.8 Up 07:19:52 - 07:49:52 -744
Yerington 07:34:50 -61.3 Dark Up 56.6 68.0 Up 07:19:50 - 07:49:50 -761
Hawthorne 07:34:49 -61.8 Dark Up 56.8 67.4 Up 07:19:49 - 07:49:49 -827
Lee Vining 07:34:52 -62.4 Dark Up 56.3 66.6 Up 07:19:52 - 07:49:52 -866
Tonopah 07:34:44 -62.3 Dark Up 57.7 67.0 Up 07:19:44 - 07:49:44 -926
Bishop 07:34:51 -63.0 Dark Up 56.6 65.9 Up 07:19:51 - 07:49:51 -953
Lone Pine 07:34:51 -63.7 Dark Up 56.5 64.8 Up 07:19:51 - 07:49:51 -1042
Beatty 07:34:45 -63.4 Dark Up 57.5 65.4 Up 07:19:45 - 07:49:45 -1060
CPSLO 07:35:06 -64.9 Dark Up 54.1 63.0 Up 07:20:06 - 07:50:06 -1073
Niwot 07:33:42 -58.4 Dark Up 67.0 72.0 Up 07:18:42 - 07:48:42 -1076
Indian Springs 07:34:40 -63.7 Dark Up 58.2 65.0 Up 07:19:40 - 07:49:40 -1131
Henderson 07:34:38 -64.2 Dark Up 58.4 64.2 Up 07:19:38 - 07:49:38 -1210
Searchlight/Boulder City 07:34:39 -64.8 Dark Up 58.2 63.4 Up 07:19:39 - 07:49:39 -1271
Wildwood 07:35:00 -66.2 Dark Up 55.0 61.5 Up 07:20:00 - 07:50:00 -1275
Patrick 07:34:34 -64.7 Dark Up 59.0 63.3 Up 07:19:34 - 07:49:34 -1313
Laughlin/Bullhead City 07:34:38 -65.0 Dark Up 58.3 62.9 Up 07:19:38 - 07:49:38 -1314
Kingman/Dolan Springs 07:34:36 -65.0 Dark Up 58.7 62.9 Up 07:19:36 - 07:49:36 -1329
Mohave Valley 07:34:39 -65.3 Dark Up 58.2 62.5 Up 07:19:39 - 07:49:39 -1342
DCO 07:34:31 -64.9 Dark Up 59.3 62.8 Up 07:19:31 - 07:49:31 -1368
Idyllwild 07:34:52 -66.6 Dark Up 56.2 61.0 Up 07:19:52 - 07:49:52 -1383
Lake Havasu City 07:34:38 -65.7 Dark Up 58.2 61.9 Up 07:19:38 - 07:49:38 -1392
Parker 07:34:39 -66.0 Dark Up 58.1 61.4 Up 07:19:39 - 07:49:39 -1429
Blythe 07:34:42 -66.6 Dark Up 57.6 60.7 Up 07:19:42 - 07:49:42 -1472
Calipatria 07:34:47 -67.2 Dark Up 56.7 60.2 Up 07:19:47 - 07:49:47 -1488
Yuma 07:34:44 -67.5 Dark Up 57.1 59.5 Up 07:19:44 - 07:49:44 -1565

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 07:31UT)
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 2018/02/11 17:05:16 UT

Marc W. Buie, Southwest Research Institute

RECON