RECON: TNO occultation with 03QX111

Event between 03QX111 and star GA0900:00112242 with event index number of 1548981

Geocentric closest approach at 2020/10/31 05:26:03 UTC

J2000 position of star is 01:18:34.3 +01:16:21
Equinox of date position of star is 01:19:34.2 +01:22:28
Stellar brightness G=14.4, use SENSEUP=128
Star is 16 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 41.5 AU from the Sun and 40.5 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 165 seconds.
The 1-sigma cross-track error in the shadow position is 2133 km.
The sky-plane scale is 29406.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=244.4 km assuming a 5% albedo -- 10.3 sec chord
Diameter=99.8 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 03QX111, (2020/10/31 05:26UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:47.8 -29:30:41  1.2 45.66  61
68Omi Cet      02:20:24.0 -02:53:02  2.0 15.77  12
42 Cet         01:20:52.3 -00:24:00  6.5  1.81  16
PPM 144455     01:18:46.8 +01:15:40  8.2  0.25  16
03QX111        01:19:38.6 +01:22:54 14.4        15
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 15.1 km RECON observability=1.0 and success probability=13.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 05:25:43 -45.0 Dark Up 39.1 157.0 Up 05:11:26 - 05:40:00 3172
Summerland 05:25:44 -45.0 Dark Up 39.3 156.6 Up 05:11:27 - 05:40:01 3161
Penticton 05:25:44 -45.1 Dark Up 39.4 156.7 Up 05:11:27 - 05:40:01 3155
Okanagan Falls 05:25:44 -45.2 Dark Up 39.6 156.6 Up 05:11:27 - 05:40:01 3144
Oliver 05:25:45 -45.4 Dark Up 39.7 156.6 Up 05:11:28 - 05:40:02 3133
Anarchist Mountain Observatory 05:25:44 -45.6 Dark Up 39.9 156.8 Up 05:11:27 - 05:40:01 3118
Oroville 05:25:45 -45.6 Dark Up 40.0 156.7 Up 05:11:28 - 05:40:02 3115
Tonasket 05:25:45 -45.7 Dark Up 40.2 156.6 Up 05:11:28 - 05:40:02 3101
Okanogan 05:25:47 -45.9 Dark Up 40.5 156.3 Up 05:11:30 - 05:40:04 3084
Brewster 05:25:48 -45.9 Dark Up 40.7 156.0 Up 05:11:31 - 05:40:05 3072
Manson/Chelan 05:25:49 -45.9 Dark Up 40.8 155.4 Up 05:11:32 - 05:40:06 3068
Entiat 05:25:50 -46.0 Dark Up 40.9 155.3 Up 05:11:33 - 05:40:07 3056
Wenatchee 05:25:51 -46.1 Dark Up 41.1 155.1 Up 05:11:34 - 05:40:08 3043
Ellensburg 05:25:52 -46.2 Dark Up 41.4 154.6 Up 05:11:35 - 05:40:09 3022
Yakima 05:25:53 -46.4 Dark Up 41.8 154.5 Up 05:11:36 - 05:40:10 2997
Toppenish/White Swan 05:25:53 -46.7 Dark Up 42.1 154.6 Up 05:11:36 - 05:40:10 2978
Goldendale 05:25:55 -46.7 Dark Up 42.4 153.8 Up 05:11:38 - 05:40:12 2953
The Dalles 05:25:57 -46.7 Dark Up 42.5 153.3 Up 05:11:40 - 05:40:14 2948
Pasco 05:25:50 -47.4 Dark Up 42.5 156.2 Up 05:11:33 - 05:40:07 2937
George/Umatilla 05:25:51 -47.5 Dark Up 42.8 155.8 Up 05:11:34 - 05:40:08 2921
Maupin 05:25:58 -47.0 Dark Up 42.9 153.2 Up 05:11:41 - 05:40:15 2918
PNWRO 05:25:49 -47.7 Dark Up 42.8 156.4 Up 05:11:32 - 05:40:06 2915
Madras/Culver 05:25:59 -47.3 Dark Up 43.4 153.0 Up 05:11:42 - 05:40:16 2883
Sisters 05:26:01 -47.2 Dark Up 43.6 152.2 Up 05:11:44 - 05:40:18 2873
Redmond 05:26:00 -47.4 Dark Up 43.7 152.7 Up 05:11:43 - 05:40:17 2860
Bend 05:26:01 -47.5 Dark Up 43.9 152.5 Up 05:11:44 - 05:40:18 2850
Oregon Observatory 05:26:02 -47.5 Dark Up 44.0 152.2 Up 05:11:45 - 05:40:19 2841
La Pine/Gilchrist 05:26:02 -47.6 Dark Up 44.1 152.1 Up 05:11:45 - 05:40:19 2829
North Lake 05:26:01 -48.2 Dark Up 44.7 152.7 Up 05:11:44 - 05:40:18 2783
Chiloquin 05:26:06 -47.9 Dark Up 45.0 151.1 Up 05:11:49 - 05:40:23 2763
Klamath Falls 05:26:06 -48.2 Dark Up 45.3 151.0 Up 05:11:49 - 05:40:23 2737
Paisley 05:26:02 -48.7 Dark Up 45.3 152.9 Up 05:11:45 - 05:40:19 2735
Tulelake 05:26:06 -48.5 Dark Up 45.7 151.3 Up 05:11:49 - 05:40:23 2709
Lakeview 05:26:02 -49.1 Dark Up 45.8 152.9 Up 05:11:45 - 05:40:19 2694
Cedarville 05:26:03 -49.5 Dark Up 46.5 152.8 Up 05:11:46 - 05:40:20 2643
Fall River/Burney 05:26:08 -49.0 Dark Up 46.5 151.0 Up 05:11:51 - 05:40:25 2643
Susanville 05:26:07 -49.8 Dark Up 47.3 151.6 Up 05:11:50 - 05:40:24 2576
Greenville 05:26:08 -49.8 Dark Up 47.4 151.1 Up 05:11:51 - 05:40:25 2565
Gimple 05:26:08 -49.8 Dark Up 47.5 151.2 Up 05:11:51 - 05:40:25 2562
Quincy 05:26:09 -49.9 Dark Up 47.6 151.0 Up 05:11:52 - 05:40:26 2550
Portola 05:26:08 -50.2 Dark Up 47.9 151.6 Up 05:11:51 - 05:40:25 2527
Reno 05:26:06 -50.8 Dark Up 48.4 152.4 Up 05:11:49 - 05:40:23 2488
Carson City 05:26:07 -51.0 Dark Up 48.7 152.2 Up 05:11:50 - 05:40:24 2461
Gardnerville 05:26:07 -51.2 Dark Up 48.9 152.1 Up 05:11:50 - 05:40:24 2441
Yerington 05:26:05 -51.5 Dark Up 49.1 153.0 Up 05:11:48 - 05:40:22 2428
Hawthorne 05:26:05 -52.1 Dark Up 49.7 153.5 Up 05:11:48 - 05:40:22 2377
Lee Vining 05:26:07 -52.1 Dark Up 50.0 152.5 Up 05:11:50 - 05:40:24 2349
Tonopah 05:26:01 -53.3 Dark Up 50.6 155.3 Up 05:11:44 - 05:40:18 2299
Bishop 05:26:06 -52.9 Dark Up 50.8 153.2 Up 05:11:49 - 05:40:23 2281
Lone Pine 05:26:07 -53.5 Dark Up 51.6 153.3 Up 05:11:50 - 05:40:24 2212
Beatty 05:26:02 -54.2 Dark Up 51.8 155.4 Up 05:11:45 - 05:40:19 2196
CPSLO 05:26:18 -52.2 Dark Up 51.8 148.7 Up 05:12:01 - 05:40:35 2189
Indian Springs 05:25:59 -55.1 Dark Up 52.4 156.9 Up 05:11:42 - 05:40:16 2137
Niwot 05:25:17 -58.9 Dark Up 51.0 174.4 Up 05:11:00 - 05:39:34 2100
SwRI 05:25:18 -58.9 Dark Up 51.1 174.3 Up 05:11:01 - 05:39:35 2094
Henderson 05:25:57 -55.9 Dark Up 53.2 157.7 Up 05:11:40 - 05:40:14 2073
Wildwood 05:26:13 -54.3 Dark Up 53.7 151.0 Up 05:11:56 - 05:40:30 2028
Searchlight/Boulder City 05:25:58 -56.2 Dark Up 53.7 157.5 Up 05:11:41 - 05:40:15 2024
Laughlin/Bullhead City 05:25:57 -56.6 Dark Up 54.1 157.9 Up 05:11:40 - 05:40:14 1989
Patrick 05:25:54 -57.0 Dark Up 54.1 159.2 Up 05:11:37 - 05:40:11 1987
Kingman/Dolan Springs 05:25:55 -57.0 Dark Up 54.2 158.8 Up 05:11:38 - 05:40:12 1975
Mohave Valley 05:25:58 -56.8 Dark Up 54.3 157.8 Up 05:11:41 - 05:40:15 1967
DCO 05:25:53 -57.6 Dark Up 54.6 160.2 Up 05:11:36 - 05:40:10 1940
Idyllwild 05:26:08 -55.8 Dark Up 54.7 153.7 Up 05:11:51 - 05:40:25 1939
Lake Havasu City 05:25:58 -57.1 Dark Up 54.8 158.0 Up 05:11:41 - 05:40:15 1926
Parker 05:25:58 -57.3 Dark Up 55.1 157.8 Up 05:11:41 - 05:40:15 1896
Blythe 05:26:00 -57.4 Dark Up 55.5 157.1 Up 05:11:43 - 05:40:17 1862
Calipatria 05:26:05 -57.0 Dark Up 55.7 155.2 Up 05:11:48 - 05:40:22 1851
Yuma 05:26:02 -57.8 Dark Up 56.4 156.5 Up 05:11:45 - 05:40:19 1786

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 03QX111, (2020/10/31 05:26UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 45.66  61
68Omi Cet      02:19:20.8 -02:58:45  2.0 15.77  12
42 Cet         01:19:48.4 -00:30:32  6.5  1.81  16
PPM 144455     01:17:42.6 +01:09:07  8.2  0.25  16
03QX111        01:18:34.3 +01:16:21 14.4        16
Positions are for J2000

Event circumstances last updated at 2019/06/01 22:13:30 UT

Marc W. Buie, Southwest Research Institute

RECON