RECON: TNO occultation with 12UP177

Event between 12UP177 and star UC4-597-005921 with event index number of 314168

Geocentric closest approach at 2019/12/01 05:17:20 UTC

J2000 position of star is 02:24:14.8 +29:21:19
Equinox of date position of star is 02:25:21.0 +29:26:23
Stellar brightness R=14.0, use SENSEUP=64
Star is 99 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 40.6 AU from the Sun and 39.7 AU from the Earth.
The TNO is moving 22.9 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 202 seconds.
The 1-sigma cross-track error in the shadow position is 2723 km.
The sky-plane scale is 28811.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.9 km assuming a 5% albedo -- 6.3 sec chord
Diameter=58.7 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12UP177, (2019/12/01 05:17UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8 32.78 125
Hamal          02:08:18.0 +23:33:21  2.0  7.02  93
12 Tri         02:29:20.4 +29:45:26  5.3  0.91 100
PPM 091647     02:25:51.6 +29:20:03  8.3  0.15  99
12UP177        02:25:24.9 +29:26:41 14.0        99
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 4.5 sigma about the mid-time.
The median site spacing is 20.4 km RECON observability=1.0 and success probability=18.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 05:16:52 -49.2 Dark Down 68.9 163.3 Up 05:01:52 - 05:31:52 38
Kelowna 05:16:51 -49.4 Dark Down 68.9 164.2 Up 05:01:51 - 05:31:51 27
Penticton 05:16:52 -49.5 Dark Down 69.2 163.6 Up 05:01:52 - 05:31:52 3
Okanagan Falls 05:16:53 -49.5 Dark Down 69.4 163.4 Up 05:01:53 - 05:31:53 -13
Oliver 05:16:53 -49.6 Dark Down 69.5 163.3 Up 05:01:53 - 05:31:53 -28
Anarchist Mountain Observatory 05:16:53 -49.8 Dark Down 69.7 163.7 Up 05:01:53 - 05:31:53 -50
Oroville 05:16:54 -49.8 Dark Down 69.8 163.4 Up 05:01:54 - 05:31:54 -54
Tonasket 05:16:54 -49.9 Dark Down 70.0 163.2 Up 05:01:54 - 05:31:54 -74
Okanogan 05:16:55 -50.0 Dark Down 70.3 162.6 Up 05:01:55 - 05:31:55 -98
Brewster 05:16:57 -50.0 Dark Down 70.5 161.9 Up 05:01:57 - 05:31:57 -113
Manson/Chelan 05:16:58 -49.9 Dark Down 70.7 160.8 Up 05:01:58 - 05:31:58 -117
Entiat 05:16:59 -50.0 Dark Down 70.9 160.4 Up 05:01:59 - 05:31:59 -133
Wenatchee 05:17:00 -50.0 Dark Down 71.1 159.9 Up 05:02:00 - 05:32:00 -151
Ellensburg 05:17:01 -50.1 Dark Down 71.4 158.9 Up 05:02:01 - 05:32:01 -178
Yakima 05:17:02 -50.2 Dark Down 71.8 158.4 Up 05:02:02 - 05:32:02 -213
Toppenish/White Swan 05:17:03 -50.4 Dark Down 72.0 158.6 Up 05:02:03 - 05:32:03 -239
Goldendale 05:17:05 -50.4 Dark Down 72.4 156.9 Up 05:02:05 - 05:32:05 -270
The Dalles 05:17:07 -50.3 Dark Down 72.5 155.6 Up 05:02:07 - 05:32:07 -274
Pasco 05:16:59 -51.3 Dark Down 72.4 162.0 Up 05:01:59 - 05:31:59 -302
Maupin 05:17:08 -50.5 Dark Down 72.9 155.3 Up 05:02:08 - 05:32:08 -315
George/Umatilla 05:17:01 -51.3 Dark Down 72.7 161.0 Up 05:02:01 - 05:32:01 -322
PNWRO 05:16:59 -51.5 Dark Down 72.7 162.4 Up 05:01:59 - 05:31:59 -333
Madras/Culver 05:17:09 -50.7 Dark Down 73.4 154.5 Up 05:02:09 - 05:32:09 -361
Sisters 05:17:12 -50.5 Dark Down 73.6 152.7 Up 05:02:12 - 05:32:12 -371
Redmond 05:17:10 -50.8 Dark Down 73.7 153.8 Up 05:02:10 - 05:32:10 -391
Bend 05:17:12 -50.8 Dark Down 73.9 153.1 Up 05:02:12 - 05:32:12 -404
Oregon Observatory 05:17:12 -50.8 Dark Down 74.0 152.4 Up 05:02:12 - 05:32:12 -413
La Pine/Gilchrist 05:17:13 -50.8 Dark Down 74.2 151.9 Up 05:02:13 - 05:32:13 -429
North Lake 05:17:12 -51.4 Dark Down 74.7 153.0 Up 05:02:12 - 05:32:12 -494
Chiloquin 05:17:17 -51.0 Dark Down 75.0 148.9 Up 05:02:17 - 05:32:17 -511
Klamath Falls 05:17:18 -51.1 Dark Down 75.3 148.5 Up 05:02:18 - 05:32:18 -545
Paisley 05:17:13 -51.8 Dark Down 75.4 153.2 Up 05:02:13 - 05:32:13 -559
Tulelake 05:17:17 -51.4 Dark Down 75.7 148.9 Up 05:02:17 - 05:32:17 -583
Lakeview 05:17:13 -52.1 Dark Down 75.9 152.9 Up 05:02:13 - 05:32:13 -613
Fall River/Burney 05:17:19 -51.8 Dark Down 76.5 147.2 Up 05:02:19 - 05:32:19 -668
Cedarville 05:17:15 -52.5 Dark Down 76.5 152.3 Up 05:02:15 - 05:32:15 -680
Susanville 05:17:19 -52.5 Dark Down 77.3 148.3 Up 05:02:19 - 05:32:19 -759
Greenville 05:17:21 -52.4 Dark Down 77.4 146.6 Up 05:02:21 - 05:32:21 -770
Gimple 05:17:20 -52.5 Dark Down 77.5 146.9 Up 05:02:20 - 05:32:20 -774
Quincy 05:17:21 -52.5 Dark Down 77.6 146.2 Up 05:02:21 - 05:32:21 -789
Portola 05:17:20 -52.8 Dark Down 77.9 147.5 Up 05:02:20 - 05:32:20 -822
Reno 05:17:19 -53.4 Dark Down 78.4 149.3 Up 05:02:19 - 05:32:19 -876
Carson City 05:17:19 -53.5 Dark Down 78.7 148.5 Up 05:02:19 - 05:32:19 -910
Gardnerville 05:17:20 -53.6 Dark Down 78.9 148.0 Up 05:02:20 - 05:32:20 -934
Yerington 05:17:18 -54.0 Dark Down 79.1 150.5 Up 05:02:18 - 05:32:18 -957
Hawthorne 05:17:18 -54.6 Dark Down 79.7 151.6 Up 05:02:18 - 05:32:18 -1024
Lee Vining 05:17:21 -54.4 Dark Down 80.0 147.9 Up 05:02:21 - 05:32:21 -1054
Tonopah 05:17:14 -55.8 Dark Down 80.6 157.0 Up 05:02:14 - 05:32:14 -1132
Bishop 05:17:20 -55.1 Dark Down 80.8 149.4 Up 05:02:20 - 05:32:20 -1142
CPSLO 05:17:32 -53.9 Dark Down 81.3 130.9 Up 05:02:32 - 05:32:32 -1226
Lone Pine 05:17:21 -55.6 Dark Down 81.6 148.5 Up 05:02:21 - 05:32:21 -1229
Beatty 05:17:15 -56.5 Dark Down 81.8 156.5 Up 05:02:15 - 05:32:15 -1261
Indian Springs 05:17:13 -57.4 Dark Down 82.4 162.1 Up 05:02:13 - 05:32:13 -1341
Henderson 05:17:12 -58.1 Dark Down 83.1 165.6 Up 05:02:12 - 05:32:12 -1423
Niwot 05:16:30 -63.1 Dark Down 77.5 212.7 Up 05:01:30 - 05:31:30 -1424
Wildwood 05:17:29 -55.8 Dark Down 83.3 133.8 Up 05:02:29 - 05:32:29 -1438
Searchlight/Boulder City 05:17:13 -58.3 Dark Down 83.7 164.8 Up 05:02:13 - 05:32:13 -1480
Laughlin/Bullhead City 05:17:12 -58.7 Dark Down 84.0 166.9 Up 05:02:12 - 05:32:12 -1524
Patrick 05:17:09 -59.1 Dark Down 83.9 173.0 Up 05:02:09 - 05:32:09 -1533
Kingman/Dolan Springs 05:17:11 -59.0 Dark Down 84.1 171.2 Up 05:02:11 - 05:32:11 -1546
Mohave Valley 05:17:13 -58.7 Dark Down 84.3 166.3 Up 05:02:13 - 05:32:13 -1551
Idyllwild 05:17:23 -57.3 Dark Down 84.6 143.7 Up 05:02:23 - 05:32:23 -1562
DCO 05:17:08 -59.8 Dark Down 84.2 178.7 Up 05:02:08 - 05:32:08 -1594
Lake Havasu City 05:17:13 -59.0 Dark Down 84.7 167.6 Up 05:02:13 - 05:32:13 -1601
Parker 05:17:14 -59.2 Dark Down 85.1 167.1 Up 05:02:14 - 05:32:14 -1636
Blythe 05:17:16 -59.1 Dark Down 85.5 162.4 Up 05:02:16 - 05:32:16 -1672
Calipatria 05:17:21 -58.4 Dark Down 85.7 150.1 Up 05:02:21 - 05:32:21 -1676
Yuma 05:17:19 -59.3 Dark Down 86.4 157.5 Up 05:02:19 - 05:32:19 -1759

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 12UP177, (2019/12/01 05:17UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 32.78 125
Hamal          02:07:10.7 +23:27:42  2.0  7.02  93
12 Tri         02:28:10.0 +29:40:08  5.3  0.91 100
PPM 091647     02:24:41.5 +29:14:41  8.3  0.15  99
12UP177        02:24:14.8 +29:21:19 14.0        99
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:36:45 UT

Marc W. Buie, Southwest Research Institute

RECON