RECON: TNO occultation with 10XE91

Event between 10XE91 and star GA0980:01202815 with event index number of 1038444

Geocentric closest approach at 2021/01/26 08:53:35 UTC

J2000 position of star is 06:00:38.2 +08:11:42
Equinox of date position of star is 06:01:40.5 +08:11:40
Stellar brightness G=13.5, use SENSEUP=32
Star is 18 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 39.9 AU from the Sun and 39.1 AU from the Earth.
The TNO is moving 20.1 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 102 seconds.
The 1-sigma cross-track error in the shadow position is 1586 km.
The sky-plane scale is 28387.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=276.7 km assuming a 5% albedo -- 13.8 sec chord
Diameter=113.0 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 10XE91, (2021/01/26 08:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.8 +07:24:33  0.4  1.57  20
Bellatrix      05:26:15.7 +06:22:01  1.6  9.00  25
PPM 149639     05:56:03.1 +05:51:47  6.4  2.73  21
PPM 149761     06:01:51.1 +08:17:37  8.4  0.10  18
PPM 149758     06:01:44.2 +08:13:31  9.5  0.03  18
10XE91         06:01:47.1 +08:11:40 13.5        18
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 14.8 km RECON observability=1.0 and success probability=18.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:52:08 -57.6 Dark Up 31.6 241.9 Up 08:43:08 - 09:01:08 -76
Summerland 08:52:09 -57.7 Dark Up 31.8 241.6 Up 08:43:09 - 09:01:09 -86
Penticton 08:52:07 -58.0 Dark Up 31.9 241.9 Up 08:43:07 - 09:01:07 -101
Okanagan Falls 08:52:06 -58.2 Dark Up 32.0 242.0 Up 08:43:06 - 09:01:06 -113
Oliver 08:52:06 -58.3 Dark Up 32.1 242.1 Up 08:43:06 - 09:01:06 -122
Anarchist Mountain Observatory 08:52:04 -58.4 Dark Up 32.0 242.4 Up 08:43:04 - 09:01:04 -128
Oroville 08:52:04 -58.5 Dark Up 32.1 242.4 Up 08:43:04 - 09:01:04 -134
Tonasket 08:52:03 -58.8 Dark Up 32.2 242.5 Up 08:43:03 - 09:01:03 -148
Okanogan 08:52:02 -59.1 Dark Up 32.5 242.5 Up 08:43:02 - 09:01:02 -172
Brewster 08:52:01 -59.4 Dark Up 32.7 242.5 Up 08:43:01 - 09:01:01 -192
Manson/Chelan 08:52:02 -59.7 Dark Up 33.0 242.3 Up 08:43:02 - 09:01:02 -213
Entiat 08:52:01 -59.9 Dark Up 33.2 242.3 Up 08:43:01 - 09:01:01 -228
Wenatchee 08:52:00 -60.2 Dark Up 33.4 242.4 Up 08:43:00 - 09:01:00 -246
Ellensburg 08:51:59 -60.6 Dark Up 33.7 242.4 Up 08:42:59 - 09:00:59 -277
Pasco 08:51:53 -61.0 Dark Up 33.2 244.1 Up 08:42:53 - 09:00:53 -293
Yakima 08:51:57 -61.0 Dark Up 33.9 242.6 Up 08:42:57 - 09:00:57 -303
PNWRO 08:51:51 -61.2 Dark Up 33.1 244.5 Up 08:42:51 - 09:00:51 -304
Toppenish/White Swan 08:51:56 -61.2 Dark Up 33.9 242.9 Up 08:42:56 - 09:00:56 -313
George/Umatilla 08:51:52 -61.4 Dark Up 33.4 244.1 Up 08:42:52 - 09:00:52 -319
Goldendale 08:51:55 -61.8 Dark Up 34.4 242.8 Up 08:42:55 - 09:00:55 -358
The Dalles 08:51:55 -62.1 Dark Up 34.7 242.6 Up 08:42:55 - 09:00:55 -381
Niwot 08:50:59 -59.9 Dark Up 25.6 258.6 Low 08:41:59 - 08:59:59 -395
SwRI 08:50:59 -60.1 Dark Up 25.7 258.6 Low 08:41:59 - 08:59:59 -404
Maupin 08:51:53 -62.5 Dark Up 34.9 243.0 Up 08:42:53 - 09:00:53 -406
Madras/Culver 08:51:51 -63.0 Dark Up 35.1 243.3 Up 08:42:51 - 09:00:51 -443
Redmond 08:51:50 -63.3 Dark Up 35.3 243.4 Up 08:42:50 - 09:00:50 -469
Sisters 08:51:51 -63.4 Dark Up 35.6 243.1 Up 08:42:51 - 09:00:51 -476
Bend 08:51:49 -63.6 Dark Up 35.5 243.4 Up 08:42:49 - 09:00:49 -486
Oregon Observatory 08:51:49 -63.8 Dark Up 35.7 243.4 Up 08:42:49 - 09:00:49 -501
La Pine/Gilchrist 08:51:48 -64.0 Dark Up 35.8 243.5 Up 08:42:48 - 09:00:48 -516
North Lake 08:51:45 -64.3 Dark Up 35.6 244.3 Up 08:42:45 - 09:00:45 -532
Paisley 08:51:42 -64.7 Dark Up 35.6 245.0 Up 08:42:42 - 09:00:42 -562
Lakeview 08:51:40 -65.1 Dark Up 35.7 245.5 Up 08:42:40 - 09:00:40 -593
Chiloquin 08:51:45 -65.1 Dark Up 36.6 243.9 Up 08:42:45 - 09:00:45 -602
Klamath Falls 08:51:43 -65.4 Dark Up 36.7 244.2 Up 08:42:43 - 09:00:43 -624
Cedarville 08:51:37 -65.7 Dark Up 35.9 246.1 Up 08:42:37 - 09:00:37 -635
Tulelake 08:51:42 -65.6 Dark Up 36.6 244.6 Up 08:42:42 - 09:00:42 -636
Fall River/Burney 08:51:38 -66.5 Dark Up 36.9 245.3 Up 08:42:38 - 09:00:38 -699
Susanville 08:51:34 -66.8 Dark Up 36.7 246.4 Up 08:42:34 - 09:00:34 -726
Gimple 08:51:33 -67.2 Dark Up 36.9 246.4 Up 08:42:33 - 09:00:33 -752
Greenville 08:51:34 -67.2 Dark Up 37.0 246.3 Up 08:42:34 - 09:00:34 -754
Portola 08:51:31 -67.3 Dark Up 36.8 247.0 Up 08:42:31 - 09:00:31 -766
Quincy 08:51:33 -67.4 Dark Up 37.1 246.5 Up 08:42:33 - 09:00:33 -768
Reno 08:51:28 -67.4 Dark Up 36.4 247.7 Up 08:42:28 - 09:00:28 -770
Yerington 08:51:25 -67.7 Dark Up 36.2 248.6 Up 08:42:25 - 09:00:25 -794
Carson City 08:51:27 -67.7 Dark Up 36.6 247.9 Up 08:42:27 - 09:00:27 -796
Gardnerville 08:51:26 -67.9 Dark Up 36.6 248.2 Up 08:42:26 - 09:00:26 -813
Hawthorne 08:51:22 -67.9 Dark Up 36.0 249.4 Up 08:42:22 - 09:00:22 -816
Tonopah 08:51:16 -67.7 Dark Up 35.1 250.8 Up 08:42:16 - 09:00:16 -816
Lee Vining 08:51:21 -68.6 Dark Up 36.5 249.3 Up 08:42:21 - 09:00:21 -870
Indian Springs 08:51:07 -68.2 Dark Up 34.4 252.9 Up 08:42:07 - 09:00:07 -890
Beatty 08:51:11 -68.5 Dark Up 35.1 251.9 Up 08:42:11 - 09:00:11 -892
Bishop 08:51:17 -68.8 Dark Up 36.2 250.3 Up 08:42:17 - 09:00:17 -897
Henderson 08:51:04 -68.3 Dark Up 34.1 253.8 Up 08:42:04 - 09:00:04 -914
Patrick 08:50:58 -68.2 Dark Up 33.4 255.0 Up 08:41:58 - 08:59:58 -934
DCO 08:50:55 -68.0 Dark Up 32.9 255.7 Up 08:41:55 - 08:59:55 -940
Lone Pine 08:51:13 -69.3 Dark Up 36.2 251.1 Up 08:42:13 - 09:00:13 -947
Kingman/Dolan Springs 08:50:58 -68.4 Dark Up 33.6 255.0 Up 08:41:58 - 08:59:58 -956
Searchlight/Boulder City 08:51:01 -68.7 Dark Up 34.2 254.2 Up 08:42:01 - 09:00:01 -956
Laughlin/Bullhead City 08:50:59 -68.8 Dark Up 34.0 254.7 Up 08:41:59 - 08:59:59 -971
Mohave Valley 08:50:58 -69.0 Dark Up 34.1 254.8 Up 08:41:58 - 08:59:58 -992
Lake Havasu City 08:50:56 -69.1 Dark Up 34.0 255.3 Up 08:41:56 - 08:59:56 -1017
Parker 08:50:55 -69.3 Dark Up 34.0 255.5 Up 08:41:55 - 08:59:55 -1044
Blythe 08:50:53 -69.9 Dark Up 34.4 255.6 Up 08:41:53 - 08:59:53 -1093
CPSLO 08:51:15 -71.5 Dark Up 38.6 250.0 Up 08:42:15 - 09:00:15 -1115
Idyllwild 08:50:59 -71.0 Dark Up 36.1 254.1 Up 08:41:59 - 08:59:59 -1138
Calipatria 08:50:54 -70.8 Dark Up 35.3 255.3 Up 08:41:54 - 08:59:54 -1156
Wildwood 08:51:05 -71.7 Dark Up 37.4 252.4 Up 08:42:05 - 09:00:05 -1158
Yuma 08:50:50 -70.6 Dark Up 34.7 256.2 Up 08:41:50 - 08:59:50 -1168

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, (2021/01/26 08:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  1.57  20
Bellatrix      05:25:07.8 +06:20:58  1.6  9.00  25
PPM 149639     05:54:55.4 +05:51:39  6.4  2.73  21
PPM 149761     06:00:42.3 +08:17:39  8.4  0.10  18
PPM 149758     06:00:35.3 +08:13:33  9.5  0.03  18
10XE91         06:00:38.2 +08:11:42 13.5        18
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:58:13 UT

Marc W. Buie, Southwest Research Institute

RECON