RECON: TNO occultation with 01VN71

Event between 01VN71 and star UC4-610-032056 with event index number of 97826

Geocentric closest approach at 2018/01/30 01:34:12 UTC

J2000 position of star is 06:22:27.1 +31:49:56
Equinox of date position of star is 06:23:30.3 +31:49:24
Stellar brightness R=16.5
Star is 18 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 30.3 AU from the Sun and 29.5 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 401 seconds.
The 1-sigma cross-track error in the shadow position is 3672 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=102.3 km assuming a 5% albedo -- 5.3 sec chord
Diameter=41.8 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 01VN71, (2018/01/30 01:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.3 +27:58:52  1.1 18.32  10
Alnath         05:27:26.2 +28:37:16  1.6 12.54  28
48 Aur         06:29:43.8 +30:28:49  6.4  1.87  16
PPM 071595     06:26:23.5 +32:15:37  8.1  0.73  18
PPM 071536     06:23:01.1 +31:56:09 10.0  0.17  18
01VN71         06:23:37.6 +31:49:20 16.5        18
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 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 01:37:25 -7.9 CT Up 41.6 86.9 Up 01:03:33 - 02:11:18 -304
Tonasket 01:37:26 -7.9 CT Up 41.6 86.7 Up 01:03:34 - 02:11:19 -324
Okanogan 01:37:27 -7.7 CT Up 41.5 86.3 Up 01:03:35 - 02:11:20 -347
Brewster 01:37:28 -7.5 CT Up 41.4 85.9 Up 01:03:36 - 02:11:21 -363
Manson/Chelan 01:37:30 -7.2 CT Up 41.1 85.5 Up 01:03:37 - 02:11:22 -368
Entiat 01:37:31 -7.1 CT Up 41.0 85.3 Up 01:03:38 - 02:11:23 -384
Wenatchee 01:37:32 -6.9 CT Up 41.0 85.0 Up 01:03:39 - 02:11:24 -402
Ellensburg 01:37:34 -6.6 CT Up 40.8 84.5 Up 01:03:42 - 02:11:27 -429
Yakima 01:37:35 -6.5 CT Up 40.7 84.1 Up 01:03:43 - 02:11:28 -463
Toppenish/White Swan 01:37:36 -6.6 CT Up 40.8 84.0 Up 01:03:43 - 02:11:28 -488
Pasco 01:37:34 -7.3 CT Up 41.7 84.8 Up 01:03:42 - 02:11:27 -544
PNWRO 01:37:34 -7.4 CT Up 41.8 84.7 Up 01:03:42 - 02:11:27 -573
George/Umatilla 01:37:36 -7.1 CT Up 41.5 84.3 Up 01:03:43 - 02:11:28 -565
Goldendale 01:37:39 -6.1 CT Up 40.5 83.3 Up 01:03:46 - 02:11:31 -520
The Dalles 01:37:40 -5.8 CT Up 40.2 82.9 Up 01:03:48 - 02:11:33 -526
Maupin 01:37:41 -5.7 CT Up 40.2 82.6 Up 01:03:49 - 02:11:34 -566
Madras/Culver 01:37:44 -5.5 CT Up 40.1 82.1 Up 01:03:51 - 02:11:36 -611
Sisters 01:37:46 -5.1 CT Up 39.8 81.6 Up 01:03:53 - 02:11:38 -623
Redmond 01:37:45 -5.4 CT Up 40.0 81.8 Up 01:03:52 - 02:11:37 -640
Bend 01:37:46 -5.2 CT Up 39.9 81.5 Up 01:03:54 - 02:11:39 -653
Oregon Observatory 01:37:47 -5.1 CT Up 39.8 81.3 Up 01:03:55 - 02:11:40 -663
LaPine/Gilchrist 01:37:48 -4.9 CT Up 39.7 81.1 Up 01:03:55 - 02:11:40 -679
North Lake 01:37:48 -5.2 CT Up 40.1 81.1 Up 01:03:55 - 02:11:40 -740
Paisley 01:37:49 -5.3 CT Up 40.3 80.9 Up 01:03:57 - 02:11:42 -802
Chiloquin 01:37:52 -4.3 CT Up 39.3 80.0 Up 01:04:00 - 02:11:45 -762
Klamath Falls 01:37:53 -4.3 CT Up 39.3 79.8 Up 01:04:01 - 02:11:46 -796
Lakeview 01:37:51 -5.3 CT Up 40.3 80.5 Up 01:03:58 - 02:11:43 -854
Tulelake 01:37:54 -4.4 CT Up 39.5 79.7 Up 01:04:01 - 02:11:46 -831
Cedarville 01:37:53 -5.2 CT Up 40.4 80.1 Up 01:04:00 - 02:11:45 -919
Fall River/Burney 01:37:57 -4.2 CT Up 39.4 79.0 Up 01:04:04 - 02:11:49 -915
Susanville 01:37:57 -4.5 CT Up 39.8 78.9 Up 01:04:05 - 02:11:50 -1000
Greenville 01:37:59 -4.2 CT Up 39.5 78.6 Up 01:04:06 - 02:11:51 -1014
Niwot 01:37:19 -15.7 AT Up 51.4 87.1 Up 01:03:27 - 02:11:12 -1590
Quincy 01:37:59 -4.1 CT Up 39.5 78.4 Up 01:04:07 - 02:11:52 -1032
Portola 01:37:59 -4.4 CT Up 39.8 78.5 Up 01:04:06 - 02:11:51 -1062
Reno 01:37:59 -4.8 CT Up 40.3 78.6 Up 01:04:06 - 02:11:51 -1112
Carson City 01:37:59 -4.7 CT Up 40.2 78.4 Up 01:04:07 - 02:11:52 -1146
Yerington 01:37:59 -5.1 CT Up 40.7 78.5 Up 01:04:06 - 02:11:51 -1189
Gardnerville 01:38:00 -4.7 CT Up 40.2 78.2 Up 01:04:08 - 02:11:53 -1170
Hawthorne 01:37:59 -5.3 CT Up 41.0 78.4 Up 01:04:06 - 02:11:51 -1253
Lee Vining 01:38:02 -4.8 CT Up 40.5 77.7 Up 01:04:10 - 02:11:55 -1285
Tonopah 01:37:57 -6.2 CT Up 42.0 78.7 Up 01:04:05 - 02:11:50 -1352
Bishop 01:38:02 -5.2 CT Up 40.9 77.5 Up 01:04:10 - 02:11:55 -1370
Lone Pine 01:38:03 -5.2 CT Up 41.0 77.0 Up 01:04:11 - 02:11:56 -1454
Beatty 01:37:59 -6.3 CT Up 42.1 77.8 Up 01:04:07 - 02:11:52 -1479
Indian Springs 01:37:58 -7.0 CT Up 42.9 78.0 Up 01:04:05 - 02:11:50 -1552
Henderson 01:37:58 -7.4 CT Up 43.3 77.8 Up 01:04:05 - 02:11:50 -1631
Searchlight/Boulder City 01:37:59 -7.2 CT Up 43.2 77.3 Up 01:04:06 - 02:11:51 -1688
CPSLO 01:38:13 -2.8 CT Up 38.7 74.9 Up 01:04:21 - 02:12:06 -1468
Kingman/Dolan Springs 01:37:57 -7.8 CT Up 43.9 77.4 Up 01:04:05 - 02:11:50 -1749
Laughlin/Bullhead City 01:37:59 -7.4 CT Up 43.5 77.2 Up 01:04:06 - 02:11:51 -1730
DCO 01:37:55 -8.5 CT Up 44.6 77.7 Up 01:04:03 - 02:11:48 -1792
Mohave Valley 01:37:59 -7.4 CT Up 43.4 77.0 Up 01:04:07 - 02:11:52 -1757
Lake Havasu City 01:38:00 -7.4 CT Up 43.5 76.7 Up 01:04:07 - 02:11:52 -1805
Parker 01:38:01 -7.4 CT Up 43.4 76.4 Up 01:04:08 - 02:11:53 -1841
Idyllwild 01:38:08 -5.4 CT Up 41.4 75.1 Up 01:04:16 - 02:12:01 -1781
Blythe 01:38:03 -7.0 CT Up 43.1 75.8 Up 01:04:10 - 02:11:55 -1879
Calipatria 01:38:07 -6.1 CT Up 42.2 75.0 Up 01:04:14 - 02:11:59 -1889
Yuma 01:38:06 -6.7 CT Up 42.8 75.0 Up 01:04:13 - 02:11:58 -1968

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.

Event circumstances last updated at 2016/03/12 18:20:50 UT

Marc W. Buie, Southwest Research Institute

RECON