RECON: TNO occultation with 145451

Event between (145451) 05RM43 and star UC4-528-009767 with event index number of 90767

Geocentric closest approach at 2017/12/02 07:25:07 UTC

J2000 position of star is 04:47:54.9 +15:34:23
Equinox of date position of star is 04:48:55.1 +15:36:11
Stellar brightness R=14.9, use SENSEUP=128
Star is 21 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=20.1

[RECON map]
TNO is 36.7 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is 1647 km.
The sky-plane scale is 25921.5 km/arcsec.

The TNO has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 30.4 sec chord
Diameter=309.7 km assuming a 30% albedo -- 12.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 145451, (2017/12/02 07:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.1 +16:32:38  0.8  3.03  18
Bellatrix      05:26:05.6 +06:21:52  1.6 12.97  31
4Omi1Ori       04:53:32.9 +14:16:45  4.7  1.73  22
PPM 120238     04:47:31.9 +15:30:11  8.5  0.35  21
PPM 120291     04:49:55.7 +15:35:59  9.5  0.24  21
145451         04:48:56.3 +15:36:13 14.9        21
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 22.7 km RECON observability=1.0 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:25:31 -62.7 Dark Up 55.9 164.9 Up 07:18:41 - 07:32:21 7588
Tonasket 07:25:31 -62.9 Dark Up 56.1 164.9 Up 07:18:41 - 07:32:21 7566
Okanogan 07:25:31 -63.3 Dark Up 56.4 164.5 Up 07:18:41 - 07:32:21 7535
Brewster 07:25:32 -63.5 Dark Up 56.6 164.0 Up 07:18:42 - 07:32:22 7511
Manson/Chelan 07:25:34 -63.6 Dark Up 56.8 163.3 Up 07:18:44 - 07:32:24 7493
Entiat 07:25:34 -63.8 Dark Up 57.0 163.1 Up 07:18:44 - 07:32:24 7472
Wenatchee 07:25:34 -64.1 Dark Up 57.2 162.8 Up 07:18:44 - 07:32:24 7449
Ellensburg 07:25:35 -64.4 Dark Up 57.5 162.2 Up 07:18:45 - 07:32:25 7411
Yakima 07:25:36 -64.8 Dark Up 57.9 162.0 Up 07:18:46 - 07:32:26 7373
Toppenish/White Swan 07:25:35 -65.1 Dark Up 58.2 162.2 Up 07:18:45 - 07:32:25 7351
Pasco 07:25:31 -65.4 Dark Up 58.5 164.4 Up 07:18:41 - 07:32:21 7334
PNWRO 07:25:31 -65.7 Dark Up 58.8 164.7 Up 07:18:41 - 07:32:21 7310
George/Umatilla 07:25:32 -65.7 Dark Up 58.8 163.8 Up 07:18:42 - 07:32:22 7303
Goldendale 07:25:37 -65.5 Dark Up 58.6 161.2 Up 07:18:47 - 07:32:27 7301
The Dalles 07:25:38 -65.7 Dark Up 58.7 160.4 Up 07:18:48 - 07:32:28 7281
Maupin 07:25:38 -66.1 Dark Up 59.1 160.3 Up 07:18:48 - 07:32:28 7240
Madras/Culver 07:25:38 -66.6 Dark Up 59.7 160.0 Up 07:18:48 - 07:32:28 7188
Sisters 07:25:40 -66.8 Dark Up 59.9 158.9 Up 07:18:50 - 07:32:30 7158
Redmond 07:25:39 -67.0 Dark Up 60.0 159.7 Up 07:18:49 - 07:32:29 7153
Bend 07:25:39 -67.1 Dark Up 60.1 159.3 Up 07:18:49 - 07:32:29 7133
Oregon Observatory 07:25:40 -67.3 Dark Up 60.3 158.9 Up 07:18:50 - 07:32:30 7117
La Pine/Gilchrist 07:25:40 -67.5 Dark Up 60.4 158.7 Up 07:18:50 - 07:32:30 7097
North Lake 07:25:38 -68.0 Dark Up 61.0 159.5 Up 07:18:48 - 07:32:28 7052
Paisley 07:25:38 -68.6 Dark Up 61.6 159.9 Up 07:18:48 - 07:32:28 6996
Chiloquin 07:25:41 -68.4 Dark Up 61.4 157.3 Up 07:18:51 - 07:32:31 6990
Klamath Falls 07:25:41 -68.8 Dark Up 61.7 157.2 Up 07:18:51 - 07:32:31 6956
Lakeview 07:25:38 -69.1 Dark Up 62.1 159.9 Up 07:18:48 - 07:32:28 6945
Tulelake 07:25:41 -69.1 Dark Up 62.1 157.6 Up 07:18:51 - 07:32:31 6928
Cedarville 07:25:37 -69.8 Dark Up 62.8 159.8 Up 07:18:47 - 07:32:27 6879
Fall River/Burney 07:25:41 -70.0 Dark Up 62.9 157.0 Up 07:18:51 - 07:32:31 6837
Susanville 07:25:39 -70.7 Dark Up 63.7 158.1 Up 07:18:49 - 07:32:29 6770
Greenville 07:25:40 -70.9 Dark Up 63.9 157.3 Up 07:18:50 - 07:32:30 6744
Gimple 07:25:40 -71.0 Dark Up 63.9 157.4 Up 07:18:50 - 07:32:30 6743
Quincy 07:25:40 -71.1 Dark Up 64.1 157.1 Up 07:18:50 - 07:32:30 6723
Niwot 07:24:47 -70.4 Dark Up 65.0 192.4 Up 07:17:57 - 07:31:37 6711
Portola 07:25:39 -71.4 Dark Up 64.3 158.0 Up 07:18:49 - 07:32:29 6708
Reno 07:25:37 -71.8 Dark Up 64.8 159.2 Up 07:18:47 - 07:32:27 6679
Carson City 07:25:38 -72.1 Dark Up 65.1 159.0 Up 07:18:48 - 07:32:28 6642
Yerington 07:25:35 -72.4 Dark Up 65.4 160.2 Up 07:18:45 - 07:32:25 6619
Gardnerville 07:25:37 -72.4 Dark Up 65.3 158.9 Up 07:18:47 - 07:32:27 6617
Hawthorne 07:25:34 -73.0 Dark Up 66.0 161.0 Up 07:18:44 - 07:32:24 6570
Tonopah 07:25:29 -73.7 Dark Up 66.8 164.0 Up 07:18:39 - 07:32:19 6517
Lee Vining 07:25:36 -73.4 Dark Up 66.4 159.5 Up 07:18:46 - 07:32:26 6515
Bishop 07:25:33 -74.2 Dark Up 67.2 160.7 Up 07:18:43 - 07:32:23 6450
Beatty 07:25:27 -74.9 Dark Up 68.0 164.3 Up 07:18:37 - 07:32:17 6396
Lone Pine 07:25:32 -75.0 Dark Up 68.0 160.9 Up 07:18:42 - 07:32:22 6370
Indian Springs 07:25:24 -75.3 Dark Up 68.5 166.8 Up 07:18:34 - 07:32:14 6358
Henderson 07:25:22 -75.9 Dark Up 69.2 168.3 Up 07:18:32 - 07:32:12 6301
CPSLO 07:25:41 -75.5 Dark Up 68.4 153.3 Up 07:18:51 - 07:32:31 6247
Searchlight/Boulder City 07:25:22 -76.5 Dark Up 69.8 168.2 Up 07:18:32 - 07:32:12 6241
Patrick 07:25:17 -76.6 Dark Up 70.0 171.0 Up 07:18:27 - 07:32:07 6233
Kingman/Dolan Springs 07:25:18 -76.8 Dark Up 70.2 170.4 Up 07:18:28 - 07:32:08 6210
Laughlin/Bullhead City 07:25:20 -76.8 Dark Up 70.1 168.9 Up 07:18:30 - 07:32:10 6209
DCO 07:25:15 -76.9 Dark Up 70.3 172.9 Up 07:18:25 - 07:32:05 6199
Mohave Valley 07:25:20 -77.1 Dark Up 70.4 168.8 Up 07:18:30 - 07:32:10 6180
Lake Havasu City 07:25:19 -77.5 Dark Up 70.8 169.3 Up 07:18:29 - 07:32:09 6138
Wildwood 07:25:35 -77.3 Dark Up 70.2 157.2 Up 07:18:45 - 07:32:25 6111
Parker 07:25:19 -77.8 Dark Up 71.1 169.2 Up 07:18:29 - 07:32:09 6100
Idyllwild 07:25:28 -78.0 Dark Up 71.1 162.0 Up 07:18:38 - 07:32:18 6066
Blythe 07:25:20 -78.4 Dark Up 71.6 168.0 Up 07:18:30 - 07:32:10 6046
Calipatria 07:25:24 -78.8 Dark Up 71.9 164.9 Up 07:18:34 - 07:32:14 5997
Yuma 07:25:21 -79.3 Dark Up 72.5 167.3 Up 07:18:31 - 07:32:11 5948

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 145451, (2017/12/02 07:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  3.03  18
Bellatrix      05:25:07.8 +06:20:58  1.6 12.97  31
4Omi1Ori       04:52:32.0 +14:15:01  4.7  1.73  22
PPM 120238     04:46:30.5 +15:28:18  8.5  0.35  21
PPM 120291     04:48:54.3 +15:34:10  9.5  0.24  21
145451         04:47:54.9 +15:34:23 14.9        21
Positions are for J2000

Event circumstances last updated at 2017/07/29 16:11:43 UT

Marc W. Buie, Southwest Research Institute

RECON