RECON: TNO occultation with 10XE91

Event between 10XE91 and star GA0980:01228300 with event index number of 1038439

Geocentric closest approach at 2021/01/09 03:49:05 UTC

J2000 position of star is 06:01:54.8 +08:07:44
Equinox of date position of star is 06:02:57.1 +08:07:40
Stellar brightness G=15.2, use SENSEUP=128
Star is 143 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 39.9 AU from the Sun and 39.0 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is 1488 km.
The sky-plane scale is 28280.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=276.7 km assuming a 5% albedo -- 11.6 sec chord
Diameter=113.0 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 10XE91, (2021/01/09 03:49UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.6 +07:24:33  0.4  1.82 144
Bellatrix      05:26:15.6 +06:22:01  1.6  9.29 151
63 Ori         06:06:05.5 +05:25:01  6.4  2.81 142
PPM 149761     06:01:51.0 +08:17:37  8.4  0.34 143
PPM 149814     06:03:50.1 +08:00:58  8.7  0.22 143
10XE91         06:03:03.4 +08:07:39 15.2       143
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 5.0 sigma about the mid-time.
The median site spacing is 22.5 km RECON observability=1.0 and success probability=28.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:51:30 -33.8 Dark Down 35.0 124.3 Up 03:43:37 - 03:59:23 -2
Summerland 03:51:31 -33.5 Dark Down 34.9 124.0 Up 03:43:38 - 03:59:24 -6
Penticton 03:51:31 -33.7 Dark Down 35.1 124.0 Up 03:43:38 - 03:59:24 -34
Okanagan Falls 03:51:31 -33.7 Dark Down 35.2 123.8 Up 03:43:38 - 03:59:24 -50
Oliver 03:51:32 -33.7 Dark Down 35.3 123.8 Up 03:43:39 - 03:59:25 -65
Anarchist Mountain Observatory 03:51:32 -33.9 Dark Down 35.5 123.9 Up 03:43:39 - 03:59:25 -80
Oroville 03:51:32 -33.8 Dark Down 35.5 123.7 Up 03:43:39 - 03:59:25 -86
Tonasket 03:51:32 -33.9 Dark Down 35.7 123.6 Up 03:43:39 - 03:59:25 -107
Okanogan 03:51:33 -33.8 Dark Down 35.8 123.3 Up 03:43:40 - 03:59:26 -137
Brewster 03:51:34 -33.7 Dark Down 35.8 122.9 Up 03:43:41 - 03:59:27 -161
Manson/Chelan 03:51:35 -33.4 Dark Down 35.7 122.4 Up 03:43:42 - 03:59:28 -180
Entiat 03:51:36 -33.4 Dark Down 35.8 122.2 Up 03:43:43 - 03:59:29 -200
Wenatchee 03:51:37 -33.4 Dark Down 35.9 121.9 Up 03:43:44 - 03:59:30 -223
Ellensburg 03:51:38 -33.2 Dark Down 36.0 121.5 Up 03:43:45 - 03:59:31 -261
Yakima 03:51:39 -33.2 Dark Down 36.2 121.2 Up 03:43:46 - 03:59:32 -298
Toppenish/White Swan 03:51:39 -33.4 Dark Down 36.4 121.2 Up 03:43:46 - 03:59:32 -317
Pasco 03:51:36 -34.2 Dark Down 37.2 122.4 Up 03:43:43 - 03:59:29 -328
PNWRO 03:51:36 -34.4 Dark Down 37.5 122.5 Up 03:43:43 - 03:59:29 -350
George/Umatilla 03:51:37 -34.1 Dark Down 37.2 122.0 Up 03:43:44 - 03:59:30 -359
Goldendale 03:51:41 -33.1 Dark Down 36.4 120.5 Up 03:43:48 - 03:59:34 -368
The Dalles 03:51:42 -32.8 Dark Down 36.3 120.0 Up 03:43:49 - 03:59:35 -389
Maupin 03:51:42 -32.9 Dark Down 36.6 119.8 Up 03:43:49 - 03:59:35 -428
Madras/Culver 03:51:43 -32.9 Dark Down 36.8 119.4 Up 03:43:50 - 03:59:36 -479
Sisters 03:51:45 -32.6 Dark Down 36.7 118.8 Up 03:43:52 - 03:59:38 -510
Redmond 03:51:44 -32.9 Dark Down 37.0 119.1 Up 03:43:51 - 03:59:37 -512
Bend 03:51:45 -32.8 Dark Down 37.0 118.9 Up 03:43:52 - 03:59:38 -533
Oregon Observatory 03:51:46 -32.7 Dark Down 37.0 118.6 Up 03:43:53 - 03:59:39 -549
La Pine/Gilchrist 03:51:46 -32.6 Dark Down 37.1 118.4 Up 03:43:53 - 03:59:39 -568
North Lake 03:51:45 -33.1 Dark Down 37.7 118.7 Up 03:43:52 - 03:59:38 -609
Paisley 03:51:45 -33.3 Dark Down 38.2 118.7 Up 03:43:52 - 03:59:38 -661
Chiloquin 03:51:49 -32.4 Dark Down 37.4 117.4 Up 03:43:56 - 03:59:42 -674
Klamath Falls 03:51:49 -32.4 Dark Down 37.6 117.2 Up 03:43:56 - 03:59:42 -706
Lakeview 03:51:46 -33.5 Dark Down 38.5 118.5 Up 03:43:53 - 03:59:39 -710
Tulelake 03:51:49 -32.6 Dark Down 37.9 117.3 Up 03:43:56 - 03:59:42 -732
Cedarville 03:51:46 -33.6 Dark Down 39.0 118.2 Up 03:43:53 - 03:59:39 -773
Fall River/Burney 03:51:50 -32.7 Dark Down 38.4 116.8 Up 03:43:57 - 03:59:43 -820
Niwot 03:51:06 -44.9 Dark Down 48.9 133.2 Up 03:43:13 - 03:58:59 -866
SwRI 03:51:06 -44.8 Dark Down 48.9 133.0 Up 03:43:13 - 03:58:59 -877
Susanville 03:51:49 -33.2 Dark Down 39.2 117.0 Up 03:43:56 - 03:59:42 -881
Greenville 03:51:51 -33.0 Dark Down 39.1 116.5 Up 03:43:58 - 03:59:44 -908
Gimple 03:51:50 -33.1 Dark Down 39.1 116.6 Up 03:43:57 - 03:59:43 -908
Quincy 03:51:51 -33.0 Dark Down 39.2 116.4 Up 03:43:58 - 03:59:44 -928
Portola 03:51:50 -33.3 Dark Down 39.6 116.7 Up 03:43:57 - 03:59:43 -940
Reno 03:51:48 -33.8 Dark Down 40.1 117.1 Up 03:43:55 - 03:59:41 -965
Carson City 03:51:49 -33.8 Dark Down 40.3 116.9 Up 03:43:56 - 03:59:42 -1001
Yerington 03:51:47 -34.3 Dark Down 40.8 117.3 Up 03:43:54 - 03:59:40 -1019
Gardnerville 03:51:49 -33.9 Dark Down 40.4 116.7 Up 03:43:56 - 03:59:42 -1025
Hawthorne 03:51:47 -34.7 Dark Down 41.4 117.5 Up 03:43:54 - 03:59:40 -1065
Tonopah 03:51:43 -35.8 Dark Down 42.6 118.4 Up 03:43:50 - 03:59:36 -1109
Lee Vining 03:51:49 -34.3 Dark Down 41.3 116.6 Up 03:43:56 - 03:59:42 -1121
Bishop 03:51:48 -34.9 Dark Down 42.1 116.8 Up 03:43:55 - 03:59:41 -1180
Beatty 03:51:44 -36.1 Dark Down 43.5 117.9 Up 03:43:51 - 03:59:37 -1224
Indian Springs 03:51:41 -37.0 Dark Down 44.4 118.7 Up 03:43:48 - 03:59:34 -1254
Lone Pine 03:51:48 -35.1 Dark Down 42.7 116.4 Up 03:43:55 - 03:59:41 -1256
Henderson 03:51:40 -37.5 Dark Down 45.1 118.9 Up 03:43:47 - 03:59:33 -1307
Searchlight/Boulder City 03:51:40 -37.6 Dark Down 45.4 118.4 Up 03:43:47 - 03:59:33 -1365
Patrick 03:51:37 -38.4 Dark Down 46.2 119.4 Up 03:43:44 - 03:59:30 -1367
CPSLO 03:51:56 -32.9 Dark Down 41.3 113.1 Up 03:44:03 - 03:59:49 -1390
Kingman/Dolan Springs 03:51:38 -38.2 Dark Down 46.2 119.0 Up 03:43:45 - 03:59:31 -1390
Laughlin/Bullhead City 03:51:39 -37.8 Dark Down 45.8 118.5 Up 03:43:46 - 03:59:32 -1394
DCO 03:51:35 -39.0 Dark Down 46.9 119.8 Up 03:43:42 - 03:59:28 -1396
Mohave Valley 03:51:39 -37.8 Dark Down 46.0 118.2 Up 03:43:46 - 03:59:32 -1422
Lake Havasu City 03:51:39 -38.0 Dark Down 46.3 118.1 Up 03:43:46 - 03:59:32 -1462
Parker 03:51:39 -38.0 Dark Down 46.5 117.8 Up 03:43:46 - 03:59:32 -1498
Wildwood 03:51:52 -34.5 Dark Down 43.4 113.9 Up 03:43:59 - 03:59:45 -1511
Idyllwild 03:51:47 -36.0 Dark Down 44.9 115.2 Up 03:43:54 - 03:59:40 -1545
Blythe 03:51:41 -37.7 Dark Down 46.5 117.0 Up 03:43:48 - 03:59:34 -1553
Calipatria 03:51:44 -36.9 Dark Down 46.1 115.7 Up 03:43:51 - 03:59:37 -1606
Yuma 03:51:42 -37.7 Dark Down 46.9 116.1 Up 03:43:49 - 03:59:35 -1648

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 10XE91, (2021/01/09 03:49UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  1.82 144
Bellatrix      05:25:07.8 +06:20:58  1.6  9.29 151
63 Ori         06:04:58.1 +05:25:12  6.4  2.81 142
PPM 149761     06:00:42.3 +08:17:39  8.4  0.34 143
PPM 149814     06:02:41.5 +08:01:04  8.7  0.22 143
10XE91         06:01:54.8 +08:07:44 15.2       143
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:57:19 UT

Marc W. Buie, Southwest Research Institute

RECON