RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1320:01948292 with event index number of 155122

Geocentric closest approach at 2018/10/20 07:31:50 UTC

J2000 position of star is 04:30:55.4 +43:16:45
Equinox of date position of star is 04:32:13.6 +43:19:04
Stellar brightness G=16.4, 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 234 seconds.
The 1-sigma cross-track error in the shadow position is 1564 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 07:32UT)
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 16.4        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 3.8 sigma about the mid-time.
The median site spacing is 26.0 km RECON observability=1.0 and success probability=29.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 07:35:16 -50.8 Dark Up 59.0 84.3 Up 07:20:16 - 07:50:16 35
Oroville 07:35:17 -51.4 Dark Up 59.0 83.3 Up 07:20:17 - 07:50:17 -27
Tonasket 07:35:18 -51.6 Dark Up 59.0 83.0 Up 07:20:18 - 07:50:18 -50
Okanogan 07:35:20 -52.0 Dark Up 58.8 82.3 Up 07:20:20 - 07:50:20 -79
Brewster 07:35:21 -52.2 Dark Up 58.7 81.8 Up 07:20:21 - 07:50:21 -99
Manson/Chelan 07:35:23 -52.4 Dark Up 58.4 81.2 Up 07:20:23 - 07:50:23 -108
Entiat 07:35:25 -52.6 Dark Up 58.3 80.8 Up 07:20:25 - 07:50:25 -127
Wenatchee 07:35:26 -52.9 Dark Up 58.2 80.4 Up 07:20:26 - 07:50:26 -149
Ellensburg 07:35:28 -53.3 Dark Up 58.0 79.6 Up 07:20:28 - 07:50:28 -182
Yakima 07:35:29 -53.7 Dark Up 57.9 78.9 Up 07:20:29 - 07:50:29 -221
Toppenish/White Swan 07:35:29 -53.9 Dark Up 58.0 78.7 Up 07:20:29 - 07:50:29 -248
Goldendale 07:35:33 -54.4 Dark Up 57.6 77.6 Up 07:20:33 - 07:50:33 -288
The Dalles 07:35:35 -54.6 Dark Up 57.3 77.1 Up 07:20:35 - 07:50:35 -298
Pasco 07:35:25 -54.1 Dark Up 58.8 79.1 Up 07:20:25 - 07:50:25 -302
George/Umatilla 07:35:27 -54.4 Dark Up 58.6 78.5 Up 07:20:27 - 07:50:27 -328
PNWRO 07:35:25 -54.3 Dark Up 58.9 78.9 Up 07:20:25 - 07:50:25 -335
Maupin 07:35:36 -55.1 Dark Up 57.3 76.5 Up 07:20:36 - 07:50:36 -343
Madras/Culver 07:35:38 -55.6 Dark Up 57.1 75.7 Up 07:20:38 - 07:50:38 -395
Sisters 07:35:41 -55.9 Dark Up 56.8 75.0 Up 07:20:41 - 07:50:41 -412
Redmond 07:35:40 -55.9 Dark Up 57.0 75.1 Up 07:20:40 - 07:50:40 -429
Bend 07:35:40 -56.1 Dark Up 56.9 74.8 Up 07:20:40 - 07:50:40 -445
Oregon Observatory 07:35:42 -56.3 Dark Up 56.7 74.5 Up 07:20:42 - 07:50:42 -457
La Pine/Gilchrist 07:35:43 -56.5 Dark Up 56.6 74.1 Up 07:20:43 - 07:50:43 -475
North Lake 07:35:42 -57.0 Dark Up 56.9 73.7 Up 07:20:42 - 07:50:42 -540
Chiloquin 07:35:47 -57.6 Dark Up 56.1 72.4 Up 07:20:47 - 07:50:47 -572
Paisley 07:35:42 -57.6 Dark Up 57.0 73.0 Up 07:20:42 - 07:50:42 -607
Klamath Falls 07:35:48 -57.9 Dark Up 56.0 72.0 Up 07:20:48 - 07:50:48 -609
Tulelake 07:35:48 -58.2 Dark Up 56.2 71.7 Up 07:20:48 - 07:50:48 -647
Lakeview 07:35:43 -58.1 Dark Up 57.0 72.4 Up 07:20:43 - 07:50:43 -665
Cedarville 07:35:44 -58.7 Dark Up 57.0 71.5 Up 07:20:44 - 07:50:44 -737
Fall River/Burney 07:35:50 -59.1 Dark Up 55.9 70.4 Up 07:20:50 - 07:50:50 -740
Susanville 07:35:49 -59.8 Dark Up 56.3 69.7 Up 07:20:49 - 07:50:49 -830
Greenville 07:35:51 -60.1 Dark Up 56.0 69.3 Up 07:20:51 - 07:50:51 -846
Gimple 07:35:51 -60.1 Dark Up 56.0 69.3 Up 07:20:51 - 07:50:51 -850
Quincy 07:35:52 -60.3 Dark Up 55.9 69.0 Up 07:20:52 - 07:50:52 -867
Portola 07:35:50 -60.4 Dark Up 56.2 68.9 Up 07:20:50 - 07:50:50 -897
Reno 07:35:48 -60.7 Dark Up 56.5 68.7 Up 07:20:48 - 07:50:48 -948
Carson City 07:35:49 -61.1 Dark Up 56.4 68.2 Up 07:20:49 - 07:50:49 -985
Gardnerville 07:35:50 -61.4 Dark Up 56.4 67.9 Up 07:20:50 - 07:50:50 -1011
Yerington 07:35:47 -61.3 Dark Up 56.8 68.1 Up 07:20:47 - 07:50:47 -1028
Hawthorne 07:35:46 -61.8 Dark Up 57.0 67.5 Up 07:20:46 - 07:50:46 -1094
Lee Vining 07:35:50 -62.4 Dark Up 56.4 66.6 Up 07:20:50 - 07:50:50 -1133
Tonopah 07:35:41 -62.3 Dark Up 57.8 67.0 Up 07:20:41 - 07:50:41 -1192
Bishop 07:35:48 -63.0 Dark Up 56.7 65.9 Up 07:20:48 - 07:50:48 -1220
Lone Pine 07:35:48 -63.7 Dark Up 56.7 64.9 Up 07:20:48 - 07:50:48 -1309
Beatty 07:35:42 -63.4 Dark Up 57.7 65.4 Up 07:20:42 - 07:50:42 -1326
Niwot 07:34:39 -58.3 Dark Up 67.1 72.0 Up 07:19:39 - 07:49:39 -1340
CPSLO 07:36:03 -64.9 Dark Up 54.2 63.0 Up 07:21:03 - 07:51:03 -1340
Indian Springs 07:35:37 -63.7 Dark Up 58.3 65.0 Up 07:20:37 - 07:50:37 -1397
Henderson 07:35:36 -64.2 Dark Up 58.6 64.2 Up 07:20:36 - 07:50:36 -1476
Searchlight/Boulder City 07:35:36 -64.8 Dark Up 58.4 63.4 Up 07:20:36 - 07:50:36 -1537
Wildwood 07:35:57 -66.2 Dark Up 55.2 61.5 Up 07:20:57 - 07:50:57 -1542
Patrick 07:35:32 -64.7 Dark Up 59.1 63.3 Up 07:20:32 - 07:50:32 -1579
Laughlin/Bullhead City 07:35:35 -65.0 Dark Up 58.5 62.9 Up 07:20:35 - 07:50:35 -1580
Kingman/Dolan Springs 07:35:33 -64.9 Dark Up 58.9 62.9 Up 07:20:33 - 07:50:33 -1595
Mohave Valley 07:35:36 -65.3 Dark Up 58.4 62.5 Up 07:20:36 - 07:50:36 -1608
DCO 07:35:29 -64.9 Dark Up 59.5 62.8 Up 07:20:29 - 07:50:29 -1634
Idyllwild 07:35:49 -66.6 Dark Up 56.3 61.0 Up 07:20:49 - 07:50:49 -1649
Lake Havasu City 07:35:36 -65.7 Dark Up 58.4 61.9 Up 07:20:36 - 07:50:36 -1657
Parker 07:35:36 -66.0 Dark Up 58.3 61.4 Up 07:20:36 - 07:50:36 -1695
Blythe 07:35:39 -66.6 Dark Up 57.8 60.7 Up 07:20:39 - 07:50:39 -1738
Calipatria 07:35:44 -67.1 Dark Up 56.9 60.1 Up 07:20:44 - 07:50:44 -1755
Yuma 07:35:41 -67.5 Dark Up 57.3 59.5 Up 07:20:41 - 07:50:41 -1831

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 07:32UT)
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 16.4        98
Positions are for J2000

Event circumstances last updated at 2018/06/07 20:35:38 UT

Marc W. Buie, Southwest Research Institute

RECON