RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-667-025977 with event index number of 155121

Geocentric closest approach at 2018/10/18 07:10:01 UTC

J2000 position of star is 04:31:16.8 +43:16:25
Equinox of date position of star is 04:32:32.9 +43:18:40
Stellar brightness R=13.9, use SENSEUP=64
Star is 119 degrees from the moon. Moon is 65% 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 14.1 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 692 seconds.
The 1-sigma cross-track error in the shadow position is 4398 km.
The sky-plane scale is 10731.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.4 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2018/10/18 07:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.1 +16:32:44  0.8 26.78 118
3Iot Aur       04:58:13.2 +33:11:39  2.7 11.29 125
59 Per         04:44:14.6 +43:23:57  5.2  2.12 121
PPM 047168     04:34:41.3 +43:04:12  7.1  0.45 120
PPM 047119     04:31:46.8 +43:20:26  9.6  0.15 119
248835         04:32:36.6 +43:18:46 13.9       120
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 1.3 sigma about the mid-time.
The median site spacing is 22.3 km RECON observability=1.0 and success probability=11.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:14:08 -50.2 Dark Up 54.2 78.9 Up 06:59:08 - 07:29:08 -443
Tonasket 07:14:09 -50.5 Dark Up 54.2 78.6 Up 06:59:09 - 07:29:09 -465
Okanogan 07:14:11 -50.8 Dark Up 54.0 78.1 Up 06:59:11 - 07:29:11 -492
Brewster 07:14:12 -51.0 Dark Up 53.8 77.6 Up 06:59:12 - 07:29:12 -511
Manson/Chelan 07:14:14 -51.2 Dark Up 53.6 77.1 Up 06:59:14 - 07:29:14 -517
Entiat 07:14:16 -51.4 Dark Up 53.5 76.8 Up 06:59:16 - 07:29:16 -536
Wenatchee 07:14:17 -51.6 Dark Up 53.3 76.4 Up 06:59:17 - 07:29:17 -557
Ellensburg 07:14:19 -52.0 Dark Up 53.1 75.8 Up 06:59:19 - 07:29:19 -588
Yakima 07:14:21 -52.4 Dark Up 53.0 75.2 Up 06:59:21 - 07:29:21 -626
Toppenish/White Swan 07:14:21 -52.6 Dark Up 53.1 75.1 Up 06:59:21 - 07:29:21 -653
Goldendale 07:14:25 -53.1 Dark Up 52.6 74.2 Up 06:59:25 - 07:29:25 -690
The Dalles 07:14:27 -53.2 Dark Up 52.3 73.7 Up 06:59:27 - 07:29:27 -697
Pasco 07:14:17 -52.9 Dark Up 53.9 75.5 Up 06:59:17 - 07:29:17 -711
George/Umatilla 07:14:19 -53.2 Dark Up 53.6 75.0 Up 06:59:19 - 07:29:19 -735
Maupin 07:14:28 -53.7 Dark Up 52.3 73.2 Up 06:59:28 - 07:29:28 -741
PNWRO 07:14:17 -53.2 Dark Up 54.0 75.3 Up 06:59:17 - 07:29:17 -743
Madras/Culver 07:14:30 -54.2 Dark Up 52.1 72.5 Up 06:59:30 - 07:29:30 -792
Sisters 07:14:33 -54.4 Dark Up 51.7 72.0 Up 06:59:33 - 07:29:33 -806
Redmond 07:14:31 -54.5 Dark Up 52.0 72.1 Up 06:59:31 - 07:29:31 -824
Bend 07:14:33 -54.7 Dark Up 51.8 71.8 Up 06:59:33 - 07:29:33 -839
Oregon Observatory 07:14:34 -54.8 Dark Up 51.7 71.5 Up 06:59:34 - 07:29:34 -851
La Pine/Gilchrist 07:14:35 -55.0 Dark Up 51.6 71.3 Up 06:59:35 - 07:29:35 -868
North Lake 07:14:34 -55.6 Dark Up 51.8 71.0 Up 06:59:34 - 07:29:34 -933
Chiloquin 07:14:40 -56.0 Dark Up 51.0 69.8 Up 06:59:40 - 07:29:40 -960
Klamath Falls 07:14:41 -56.4 Dark Up 50.9 69.5 Up 06:59:41 - 07:29:41 -996
Paisley 07:14:35 -56.2 Dark Up 51.9 70.4 Up 06:59:35 - 07:29:35 -1001
Tulelake 07:14:41 -56.7 Dark Up 51.0 69.2 Up 06:59:41 - 07:29:41 -1034
Lakeview 07:14:36 -56.7 Dark Up 51.9 69.9 Up 06:59:36 - 07:29:36 -1057
Fall River/Burney 07:14:44 -57.6 Dark Up 50.8 68.2 Up 06:59:44 - 07:29:44 -1125
Cedarville 07:14:38 -57.4 Dark Up 51.8 69.2 Up 06:59:38 - 07:29:38 -1128
Susanville 07:14:43 -58.3 Dark Up 51.0 67.7 Up 06:59:43 - 07:29:43 -1216
Greenville 07:14:45 -58.6 Dark Up 50.7 67.3 Up 06:59:45 - 07:29:45 -1231
Gimple 07:14:45 -58.6 Dark Up 50.8 67.4 Up 06:59:45 - 07:29:45 -1235
Quincy 07:14:46 -58.7 Dark Up 50.7 67.1 Up 06:59:46 - 07:29:46 -1251
Portola 07:14:44 -59.0 Dark Up 50.9 67.1 Up 06:59:44 - 07:29:44 -1283
Reno 07:14:43 -59.4 Dark Up 51.3 67.0 Up 06:59:43 - 07:29:43 -1335
Carson City 07:14:44 -59.7 Dark Up 51.2 66.6 Up 06:59:44 - 07:29:44 -1371
Gardnerville 07:14:44 -60.0 Dark Up 51.1 66.3 Up 06:59:44 - 07:29:44 -1397
Yerington 07:14:41 -60.0 Dark Up 51.5 66.5 Up 06:59:41 - 07:29:41 -1416
Hawthorne 07:14:41 -60.6 Dark Up 51.7 66.1 Up 06:59:41 - 07:29:41 -1483
Lee Vining 07:14:45 -61.0 Dark Up 51.2 65.3 Up 06:59:45 - 07:29:45 -1518
Tonopah 07:14:36 -61.2 Dark Up 52.5 65.8 Up 06:59:36 - 07:29:36 -1586
Bishop 07:14:43 -61.7 Dark Up 51.4 64.8 Up 06:59:43 - 07:29:43 -1607
Lone Pine 07:14:44 -62.5 Dark Up 51.3 64.0 Up 06:59:44 - 07:29:44 -1696
CPSLO 07:14:59 -63.2 Dark Up 48.9 62.2 Up 06:59:59 - 07:29:59 -1713
Beatty 07:14:38 -62.4 Dark Up 52.4 64.5 Up 06:59:38 - 07:29:38 -1718
Niwot 07:13:36 -58.9 Dark Down 61.8 71.0 Up 06:58:36 - 07:28:36 -1788
Indian Springs 07:14:34 -62.9 Dark Up 53.0 64.3 Up 06:59:34 - 07:29:34 -1794
Henderson 07:14:32 -63.5 Dark Up 53.3 63.7 Up 06:59:32 - 07:29:32 -1874
Wildwood 07:14:53 -64.9 Dark Up 49.8 61.2 Up 06:59:53 - 07:29:53 -1920
Searchlight/Boulder City 07:14:33 -64.1 Dark Up 53.1 63.1 Up 06:59:33 - 07:29:33 -1934
Laughlin/Bullhead City 07:14:32 -64.4 Dark Up 53.2 62.7 Up 06:59:32 - 07:29:32 -1977
Patrick 07:14:29 -64.2 Dark Up 53.8 63.1 Up 06:59:29 - 07:29:29 -1980
Kingman/Dolan Springs 07:14:30 -64.4 Dark Up 53.6 62.8 Up 06:59:30 - 07:29:30 -1995
Mohave Valley 07:14:33 -64.6 Dark Up 53.1 62.4 Up 06:59:33 - 07:29:33 -2005
Idyllwild 07:14:46 -65.6 Dark Up 51.0 61.0 Up 06:59:46 - 07:29:46 -2035
DCO 07:14:26 -64.5 Dark Up 54.2 62.8 Up 06:59:26 - 07:29:26 -2038
Lake Havasu City 07:14:33 -65.1 Dark Up 53.1 62.0 Up 06:59:33 - 07:29:33 -2055
Parker 07:14:34 -65.4 Dark Up 52.9 61.6 Up 06:59:34 - 07:29:34 -2091
Blythe 07:14:36 -65.9 Dark Up 52.5 60.9 Up 06:59:36 - 07:29:36 -2132
Calipatria 07:14:42 -66.3 Dark Up 51.5 60.4 Up 06:59:42 - 07:29:42 -2144
Yuma 07:14:38 -66.8 Dark Up 52.0 59.9 Up 06:59:38 - 07:29:38 -2223

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, (2018/10/18 07:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.78 118
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.29 125
59 Per         04:42:54.3 +43:21:54  5.2  2.12 121
PPM 047168     04:33:21.7 +43:01:54  7.1  0.45 120
PPM 047119     04:30:27.1 +43:18:04  9.6  0.15 119
248835         04:31:16.8 +43:16:25 13.9       119
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:00:13 UT

Marc W. Buie, Southwest Research Institute

RECON