RECON: TNO occultation with 11SO277

Event between 11SO277 and star GA0940:00208446 with event index number of 361657

Geocentric closest approach at 2020/10/13 04:51:03 UTC

J2000 position of star is 02:26:48.6 +04:14:20
Equinox of date position of star is 02:27:47.7 +04:19:22
Stellar brightness G=16.1, use SENSEUP=128
Star is 115 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 30.5 AU from the Sun and 29.6 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 1608 km.
The sky-plane scale is 21436.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=156.3 km assuming a 5% albedo -- 6.6 sec chord
Diameter=63.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 

Star training set for 11SO277, (2020/10/13 04:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.9 +16:32:58  0.8 33.96  81
68Omi Cet      02:20:23.9 -02:53:03  2.0  7.45 119
78Nu Cet       02:36:58.1 +05:40:58  4.9  2.63 112
PPM 145651     02:31:13.2 +04:41:46  8.2  0.91 114
PPM 145618     02:29:42.8 +04:18:56 10.0  0.45 114
PPM 145580     02:26:46.8 +04:01:21 10.7  0.42 115
11SO277        02:27:53.7 +04:19:53 16.1       114
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 10.1 km RECON observability=1.0 and success probability=17.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 04:52:14 -34.8 Dark Down 21.5 110.1 Low 04:42:03 - 05:02:25 1604
Kelowna 04:52:13 -35.0 Dark Down 21.7 110.4 Low 04:42:02 - 05:02:24 1600
Penticton 04:52:14 -35.1 Dark Down 21.7 110.2 Low 04:42:03 - 05:02:25 1587
Okanagan Falls 04:52:14 -35.2 Dark Down 21.8 110.1 Low 04:42:03 - 05:02:25 1580
Oliver 04:52:14 -35.3 Dark Down 21.8 110.0 Low 04:42:03 - 05:02:25 1573
Anarchist Mountain Observatory 04:52:14 -35.5 Dark Down 22.0 110.1 Low 04:42:03 - 05:02:25 1563
Oroville 04:52:14 -35.5 Dark Down 22.0 110.0 Low 04:42:03 - 05:02:25 1561
Tonasket 04:52:14 -35.6 Dark Down 22.1 109.9 Low 04:42:03 - 05:02:25 1552
Okanogan 04:52:14 -35.7 Dark Down 22.1 109.7 Low 04:42:03 - 05:02:25 1543
Manson/Chelan 04:52:14 -35.7 Dark Down 21.9 109.0 Low 04:42:03 - 05:02:25 1538
Brewster 04:52:14 -35.8 Dark Down 22.1 109.4 Low 04:42:03 - 05:02:25 1537
Entiat 04:52:14 -35.7 Dark Down 21.9 108.9 Low 04:42:03 - 05:02:25 1533
Wenatchee 04:52:14 -35.8 Dark Down 22.0 108.7 Low 04:42:03 - 05:02:25 1527
Ellensburg 04:52:14 -35.9 Dark Down 21.9 108.4 Low 04:42:03 - 05:02:25 1520
Yakima 04:52:14 -36.1 Dark Down 22.1 108.2 Low 04:42:03 - 05:02:25 1510
The Dalles 04:52:14 -36.3 Dark Down 21.9 107.3 Low 04:42:03 - 05:02:25 1504
Toppenish/White Swan 04:52:14 -36.3 Dark Down 22.2 108.2 Low 04:42:03 - 05:02:25 1501
Goldendale 04:52:14 -36.4 Dark Down 22.1 107.7 Low 04:42:03 - 05:02:25 1499
Maupin 04:52:14 -36.5 Dark Down 22.1 107.2 Low 04:42:03 - 05:02:25 1494
Madras/Culver 04:52:14 -36.8 Dark Down 22.3 107.0 Low 04:42:03 - 05:02:25 1488
Pasco 04:52:14 -37.1 Dark Down 23.1 109.2 Low 04:42:03 - 05:02:25 1466
George/Umatilla 04:52:14 -37.2 Dark Down 23.1 108.9 Low 04:42:03 - 05:02:25 1463
PNWRO 04:52:14 -37.4 Dark Down 23.3 109.3 Low 04:42:03 - 05:02:25 1453
Sisters 04:52:39 -36.7 Dark Down 22.1 106.6 Low 04:42:28 - 05:02:50 1376
Redmond 04:52:38 -37.0 Dark Down 22.4 106.9 Low 04:42:27 - 05:02:49 1368
Bend 04:52:39 -37.0 Dark Down 22.4 106.7 Low 04:42:28 - 05:02:50 1359
Oregon Observatory 04:52:40 -37.0 Dark Down 22.3 106.5 Low 04:42:29 - 05:02:51 1353
La Pine/Gilchrist 04:52:41 -37.1 Dark Down 22.4 106.4 Low 04:42:30 - 05:02:52 1343
North Lake 04:52:42 -37.7 Dark Down 22.9 106.7 Low 04:42:31 - 05:02:53 1309
Chiloquin 04:52:46 -37.4 Dark Down 22.4 105.7 Low 04:42:35 - 05:02:57 1291
Paisley 04:52:44 -38.2 Dark Down 23.3 106.8 Low 04:42:33 - 05:02:55 1273
Klamath Falls 04:52:47 -37.6 Dark Down 22.6 105.6 Low 04:42:36 - 05:02:58 1270
Tulelake 04:52:48 -37.9 Dark Down 22.9 105.8 Low 04:42:37 - 05:02:59 1250
Lakeview 04:52:45 -38.6 Dark Down 23.6 106.7 Low 04:42:34 - 05:02:56 1241
Cedarville 04:52:48 -39.0 Dark Down 23.9 106.6 Low 04:42:37 - 05:02:59 1201
Fall River/Burney 04:52:51 -38.4 Dark Down 23.2 105.5 Low 04:42:40 - 05:03:02 1198
Susanville 04:52:52 -39.2 Dark Down 23.9 105.7 Low 04:42:41 - 05:03:03 1147
Greenville 04:52:54 -39.1 Dark Down 23.8 105.4 Low 04:42:43 - 05:03:05 1137
Gimple 04:52:54 -39.2 Dark Down 23.8 105.5 Low 04:42:43 - 05:03:05 1135
Quincy 04:52:55 -39.2 Dark Down 23.8 105.3 Low 04:42:44 - 05:03:06 1125
Portola 04:52:55 -39.6 Dark Down 24.2 105.6 Low 04:42:44 - 05:03:06 1108
Reno 04:52:55 -40.2 Dark Down 24.8 106.0 Low 04:42:44 - 05:03:06 1079
Carson City 04:52:56 -40.4 Dark Down 24.9 105.8 Low 04:42:45 - 05:03:07 1058
Gardnerville 04:52:57 -40.5 Dark Down 25.0 105.8 Low 04:42:46 - 05:03:08 1042
Yerington 04:52:56 -40.9 Dark Down 25.4 106.2 Low 04:42:45 - 05:03:07 1033
Hawthorne 04:52:56 -41.5 Dark Down 25.9 106.4 Low 04:42:45 - 05:03:07 993
Lee Vining 04:52:59 -41.4 Dark Down 25.7 105.8 Low 04:42:48 - 05:03:10 969
Tonopah 04:52:56 -42.7 Dark Down 27.1 107.2 Low 04:42:45 - 05:03:07 934
Bishop 04:53:00 -42.2 Dark Down 26.5 106.0 Low 04:42:49 - 05:03:11 916
Lone Pine 04:53:03 -42.8 Dark Down 26.9 105.9 Low 04:42:52 - 05:03:14 860
Beatty 04:52:59 -43.6 Dark Down 27.8 107.0 Low 04:42:48 - 05:03:10 851
CPSLO 04:53:12 -41.5 Dark Down 25.3 103.5 Low 04:43:01 - 05:03:23 832
Niwot 04:52:14 -48.9 Dark Down 34.9 118.0 Up 04:42:03 - 05:02:25 821
Indian Springs 04:52:59 -44.5 Dark Down 28.8 107.6 Low 04:42:48 - 05:03:10 805
Henderson 04:52:59 -45.2 Dark Down 29.5 107.8 Low 04:42:48 - 05:03:10 754
Searchlight/Boulder City 04:53:01 -45.6 Dark Down 29.7 107.6 Low 04:42:50 - 05:03:12 714
Wildwood 04:53:13 -43.5 Dark Down 27.2 104.3 Low 04:43:02 - 05:03:24 706
Laughlin/Bullhead City 04:53:02 -46.0 Dark Down 30.1 107.6 Up 04:42:51 - 05:03:13 686
Patrick 04:52:59 -46.3 Dark Down 30.5 108.3 Up 04:42:48 - 05:03:10 685
Kingman/Dolan Springs 04:53:00 -46.3 Dark Down 30.4 108.0 Up 04:42:49 - 05:03:11 675
Mohave Valley 04:53:03 -46.1 Dark Down 30.1 107.5 Up 04:42:52 - 05:03:14 667
DCO 04:52:59 -47.0 Dark Down 31.2 108.6 Up 04:42:48 - 05:03:10 647
Idyllwild 04:53:10 -45.1 Dark Down 28.8 105.4 Low 04:42:59 - 05:03:21 638
Lake Havasu City 04:53:03 -46.5 Dark Down 30.5 107.5 Up 04:42:52 - 05:03:14 634
Parker 04:53:05 -46.7 Dark Down 30.6 107.3 Up 04:42:54 - 05:03:16 609
Blythe 04:53:07 -46.7 Dark Down 30.5 106.8 Up 04:42:56 - 05:03:18 580
Calipatria 04:53:10 -46.2 Dark Down 29.9 105.9 Low 04:42:59 - 05:03:21 568
Yuma 04:53:10 -47.1 Dark Down 30.8 106.2 Up 04:42:59 - 05:03:21 516

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 11SO277, (2020/10/13 04:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 33.96  81
68Omi Cet      02:19:20.8 -02:58:44  2.0  7.45 119
78Nu Cet       02:35:52.4 +05:35:35  4.9  2.63 112
PPM 145651     02:30:07.9 +04:36:16  8.2  0.91 114
PPM 145618     02:28:37.6 +04:13:25 10.0  0.45 114
PPM 145580     02:25:41.7 +03:55:47 10.7  0.42 115
11SO277        02:26:48.6 +04:14:20 16.1       115
Positions are for J2000

Event circumstances last updated at 2018/11/05 21:27:33 UT

Marc W. Buie, Southwest Research Institute

RECON