RECON: TNO occultation with 523622

Event between (523622) 07TG422 and star UC4-498-008820 with event index number of 322617

Geocentric closest approach at 2020/01/06 02:28:27 UTC

J2000 position of star is 04:45:27.9 +09:31:54
Equinox of date position of star is 04:46:29.8 +09:33:54
Stellar brightness R=14.6, use SENSEUP=128
Star is 25 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 38.3 AU from the Sun and 37.5 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is 1590 km.
The sky-plane scale is 27230.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 15.4 sec chord
Diameter=123.3 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523622, (2020/01/06 02:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.3 +16:32:53  0.8  7.35  22
Bellatrix      05:26:12.3 +06:21:58  1.6 10.32  35
2Pi 2Ori       04:51:42.3 +08:55:59  4.4  1.42  26
PPM 147861     04:44:12.3 +09:39:25  8.5  0.59  24
PPM 147895     04:45:26.4 +09:43:11  9.1  0.32  25
523622         04:46:33.7 +09:34:01 14.6        25
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 20.8 km RECON observability=1.0 and success probability=25.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 02:31:33 -21.6 Dark Up 33.7 118.8 Up 02:23:09 - 02:39:57 -403
Summerland 02:31:34 -21.3 Dark Up 33.5 118.4 Up 02:23:10 - 02:39:58 -406
Penticton 02:31:34 -21.4 Dark Up 33.7 118.4 Up 02:23:10 - 02:39:58 -434
Okanagan Falls 02:31:35 -21.4 Dark Up 33.8 118.3 Up 02:23:11 - 02:39:59 -451
Oliver 02:31:35 -21.3 Dark Up 33.9 118.2 Up 02:23:11 - 02:39:59 -466
Anarchist Mountain Observatory 02:31:35 -21.4 Dark Up 34.1 118.3 Up 02:23:11 - 02:39:59 -481
Oroville 02:31:35 -21.4 Dark Up 34.1 118.2 Up 02:23:11 - 02:39:59 -488
Tonasket 02:31:36 -21.3 Dark Up 34.2 118.0 Up 02:23:12 - 02:40:00 -509
Okanogan 02:31:37 -21.2 Dark Up 34.3 117.7 Up 02:23:13 - 02:40:01 -539
Brewster 02:31:38 -21.0 Dark Up 34.3 117.4 Up 02:23:14 - 02:40:02 -563
Manson/Chelan 02:31:40 -20.7 Dark Up 34.2 116.9 Up 02:23:16 - 02:40:04 -581
Entiat 02:31:41 -20.6 Dark Up 34.2 116.7 Up 02:23:17 - 02:40:05 -601
Wenatchee 02:31:42 -20.5 Dark Up 34.3 116.4 Up 02:23:18 - 02:40:06 -624
Ellensburg 02:31:43 -20.3 Dark Up 34.3 116.0 Up 02:23:19 - 02:40:07 -661
Yakima 02:31:44 -20.2 Dark Up 34.5 115.7 Up 02:23:20 - 02:40:08 -698
Toppenish/White Swan 02:31:45 -20.3 Dark Up 34.7 115.7 Up 02:23:21 - 02:40:09 -718
Pasco 02:31:41 -21.1 Dark Up 35.5 116.9 Up 02:23:17 - 02:40:05 -732
PNWRO 02:31:41 -21.2 Dark Up 35.8 116.9 Up 02:23:17 - 02:40:05 -756
George/Umatilla 02:31:43 -20.9 Dark Up 35.5 116.4 Up 02:23:19 - 02:40:07 -763
Goldendale 02:31:47 -19.9 Dark Up 34.7 115.0 Up 02:23:23 - 02:40:11 -768
The Dalles 02:31:48 -19.6 Dark Up 34.5 114.5 Up 02:23:24 - 02:40:12 -788
Maupin 02:31:49 -19.6 Dark Up 34.8 114.4 Up 02:23:25 - 02:40:13 -828
Madras/Culver 02:31:50 -19.4 Dark Up 35.0 114.0 Up 02:23:26 - 02:40:14 -879
Sisters 02:31:53 -19.0 Dark Up 34.8 113.4 Up 02:23:29 - 02:40:17 -909
Redmond 02:31:51 -19.3 Dark Up 35.1 113.7 Up 02:23:27 - 02:40:15 -912
Bend 02:31:53 -19.2 Dark Up 35.1 113.5 Up 02:23:29 - 02:40:17 -932
Oregon Observatory 02:31:53 -19.0 Dark Up 35.1 113.2 Up 02:23:29 - 02:40:17 -948
La Pine/Gilchrist 02:31:54 -18.9 Dark Up 35.1 113.1 Up 02:23:30 - 02:40:18 -967
North Lake 02:31:53 -19.3 Dark Up 35.7 113.3 Up 02:23:29 - 02:40:17 -1010
Paisley 02:31:53 -19.4 Dark Up 36.1 113.3 Up 02:23:29 - 02:40:17 -1064
Chiloquin 02:31:57 -18.4 Dark Up 35.3 112.0 Up 02:23:33 - 02:40:21 -1073
Klamath Falls 02:31:58 -18.4 Dark Up 35.5 111.9 Up 02:23:34 - 02:40:22 -1106
Lakeview 02:31:54 -19.4 Dark Up 36.5 113.1 Up 02:23:30 - 02:40:18 -1113
Tulelake 02:31:57 -18.6 Dark Up 35.8 112.0 Up 02:23:33 - 02:40:21 -1133
Cedarville 02:31:55 -19.4 Dark Up 36.9 112.8 Up 02:23:31 - 02:40:19 -1177
Fall River/Burney 02:31:59 -18.4 Dark Up 36.2 111.4 Up 02:23:35 - 02:40:23 -1221
Susanville 02:31:59 -18.8 Dark Up 37.0 111.6 Up 02:23:35 - 02:40:23 -1285
Greenville 02:32:00 -18.5 Dark Up 36.9 111.2 Up 02:23:36 - 02:40:24 -1311
Gimple 02:32:00 -18.6 Dark Up 36.9 111.3 Up 02:23:36 - 02:40:24 -1311
Niwot 02:31:09 -30.2 Dark Up 47.3 126.4 Up 02:22:45 - 02:39:33 -1319
Quincy 02:32:00 -18.5 Dark Up 36.9 111.0 Up 02:23:36 - 02:40:24 -1331
Portola 02:31:59 -18.8 Dark Up 37.3 111.4 Up 02:23:35 - 02:40:23 -1345
Reno 02:31:58 -19.2 Dark Up 37.9 111.7 Up 02:23:34 - 02:40:22 -1372
Carson City 02:31:58 -19.1 Dark Up 38.0 111.5 Up 02:23:34 - 02:40:22 -1408
Yerington 02:31:57 -19.6 Dark Up 38.5 111.9 Up 02:23:33 - 02:40:21 -1429
Gardnerville 02:31:59 -19.1 Dark Up 38.1 111.3 Up 02:23:35 - 02:40:23 -1432
Hawthorne 02:31:56 -19.9 Dark Up 39.1 112.0 Up 02:23:32 - 02:40:20 -1476
Tonopah 02:31:53 -20.8 Dark Up 40.3 112.8 Up 02:23:29 - 02:40:17 -1526
Lee Vining 02:31:59 -19.4 Dark Up 39.0 111.1 Up 02:23:35 - 02:40:23 -1532
Bishop 02:31:58 -19.8 Dark Up 39.7 111.3 Up 02:23:34 - 02:40:22 -1593
Beatty 02:31:53 -20.9 Dark Up 41.1 112.3 Up 02:23:29 - 02:40:17 -1643
Lone Pine 02:31:58 -19.8 Dark Up 40.2 111.0 Up 02:23:34 - 02:40:22 -1671
Indian Springs 02:31:50 -21.7 Dark Up 42.0 113.0 Up 02:23:26 - 02:40:14 -1677
Henderson 02:31:49 -22.1 Dark Up 42.7 113.1 Up 02:23:25 - 02:40:13 -1732
Searchlight/Boulder City 02:31:49 -22.0 Dark Up 43.0 112.7 Up 02:23:25 - 02:40:13 -1791
CPSLO 02:32:09 -17.5 AT Up 38.7 107.9 Up 02:23:45 - 02:40:33 -1796
Patrick 02:31:46 -22.8 Dark Up 43.8 113.6 Up 02:23:22 - 02:40:10 -1797
Kingman/Dolan Springs 02:31:47 -22.6 Dark Up 43.7 113.2 Up 02:23:23 - 02:40:11 -1820
Laughlin/Bullhead City 02:31:49 -22.2 Dark Up 43.4 112.8 Up 02:23:25 - 02:40:13 -1822
DCO 02:31:44 -23.3 Dark Up 44.4 113.9 Up 02:23:20 - 02:40:08 -1829
Mohave Valley 02:31:49 -22.2 Dark Up 43.5 112.5 Up 02:23:25 - 02:40:13 -1850
Lake Havasu City 02:31:49 -22.3 Dark Up 43.8 112.4 Up 02:23:25 - 02:40:13 -1891
Wildwood 02:32:04 -18.8 Dark Up 40.7 108.6 Up 02:23:40 - 02:40:28 -1926
Parker 02:31:49 -22.2 Dark Up 44.0 112.1 Up 02:23:25 - 02:40:13 -1927
Idyllwild 02:31:58 -20.2 Dark Up 42.3 109.7 Up 02:23:34 - 02:40:22 -1967
Blythe 02:31:51 -21.9 Dark Up 43.9 111.4 Up 02:23:27 - 02:40:15 -1981
Calipatria 02:31:55 -21.0 Dark Up 43.4 110.2 Up 02:23:31 - 02:40:19 -2031
Yuma 02:31:53 -21.6 Dark Up 44.2 110.5 Up 02:23:29 - 02:40:17 -2077

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 523622, (2020/01/06 02:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  7.35  22
Bellatrix      05:25:07.8 +06:20:58  1.6 10.32  35
2Pi 2Ori       04:50:36.7 +08:54:00  4.4  1.42  26
PPM 147861     04:43:06.5 +09:37:14  8.5  0.59  24
PPM 147895     04:44:20.5 +09:41:02  9.1  0.32  25
523622         04:45:27.9 +09:31:54 14.6        25
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:45:37 UT

Marc W. Buie, Southwest Research Institute

RECON