RECON: TNO occultation with 444018

Event between (444018) 04EU95 and star UC4-378-069798 with event index number of 199106

Geocentric closest approach at 2019/06/18 05:48:12 UTC

J2000 position of star is 14:40:49.9 -14:29:21
Equinox of date position of star is 14:41:47.6 -14:33:49
Stellar brightness R=14.9, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 42.6 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 16.5 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 338 seconds.
The 1-sigma cross-track error in the shadow position is 3953 km.
The sky-plane scale is 30328.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 14.6 sec chord
Diameter=97.9 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 444018, (2019/06/18 05:48UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.3 -11:15:44  1.0 18.73  73
27Bet Lib      15:18:03.4 -09:27:13  2.6 10.21  48
5 Lib          14:47:02.3 -15:32:26  6.5  1.57  53
PPM 229140     14:42:22.9 -14:00:40  8.5  0.57  55
PPM 229119     14:41:25.0 -14:28:43  9.8  0.15  55
444018         14:41:54.1 -14:34:19 14.9        55
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 2.7 sigma about the mid-time.
The median site spacing is 11.1 km RECON observability=0.7 and success probability=3.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:48:47 -12.1 AT Up 25.4 194.7 Low 05:33:47 - 06:03:47 -2199
Tonasket 05:48:47 -12.3 AT Up 25.6 194.8 Low 05:33:47 - 06:03:47 -2209
Okanogan 05:48:47 -12.5 AT Up 26.0 194.7 Low 05:33:47 - 06:03:47 -2226
Brewster 05:48:47 -12.7 AT Up 26.3 194.5 Low 05:33:47 - 06:03:47 -2241
Manson/Chelan 05:48:48 -12.7 AT Up 26.6 194.1 Low 05:33:48 - 06:03:48 -2256
Entiat 05:48:48 -12.9 AT Up 26.8 194.1 Low 05:33:48 - 06:03:48 -2267
Wenatchee 05:48:48 -13.1 AT Up 27.0 194.0 Low 05:33:48 - 06:03:48 -2280
Ellensburg 05:48:48 -13.4 AT Up 27.5 193.8 Low 05:33:48 - 06:03:48 -2303
Pasco 05:48:40 -14.5 AT Up 28.0 195.4 Low 05:33:40 - 06:03:40 -2316
Yakima 05:48:48 -13.7 AT Up 27.9 193.8 Low 05:33:48 - 06:03:48 -2322
PNWRO 05:48:39 -14.8 AT Up 28.2 195.7 Low 05:33:39 - 06:03:39 -2324
Toppenish/White Swan 05:48:46 -13.9 AT Up 28.1 194.0 Low 05:33:46 - 06:03:46 -2330
George/Umatilla 05:48:41 -14.7 AT Up 28.3 195.2 Low 05:33:41 - 06:03:41 -2336
Goldendale 05:48:47 -14.3 AT Up 28.7 193.7 Low 05:33:47 - 06:03:47 -2363
The Dalles 05:48:48 -14.3 AT Up 28.9 193.3 Low 05:33:48 - 06:03:48 -2380
Maupin 05:48:47 -14.7 AT Up 29.3 193.5 Low 05:33:47 - 06:03:47 -2399
Madras/Culver 05:48:46 -15.1 AT Up 29.9 193.5 Low 05:33:46 - 06:03:46 -2427
Redmond 05:48:46 -15.4 AT Up 30.2 193.5 Up 05:33:46 - 06:03:46 -2446
Niwot 05:47:22 -24.2 Dark Up 29.7 211.1 Low 05:32:22 - 06:02:22 -2448
Sisters 05:48:48 -15.3 AT Up 30.3 193.0 Up 05:33:48 - 06:03:48 -2452
Bend 05:48:47 -15.6 AT Up 30.5 193.3 Up 05:33:47 - 06:03:47 -2460
Oregon Observatory 05:48:46 -15.7 AT Up 30.7 193.2 Up 05:33:46 - 06:03:46 -2471
La Pine/Gilchrist 05:48:46 -15.8 AT Up 30.9 193.2 Up 05:33:46 - 06:03:46 -2483
North Lake 05:48:43 -16.4 AT Up 31.2 193.9 Up 05:33:43 - 06:03:43 -2495
Paisley 05:48:40 -17.0 AT Up 31.7 194.4 Up 05:33:40 - 06:03:40 -2519
Lakeview 05:48:38 -17.5 AT Up 32.1 194.7 Up 05:33:38 - 06:03:38 -2543
Chiloquin 05:48:46 -16.6 AT Up 32.0 192.9 Up 05:33:46 - 06:03:46 -2548
Klamath Falls 05:48:45 -16.9 AT Up 32.3 193.1 Up 05:33:45 - 06:03:45 -2566
Tulelake 05:48:43 -17.3 AT Up 32.5 193.4 Up 05:33:43 - 06:03:43 -2575
Cedarville 05:48:36 -18.1 Dark Up 32.7 195.0 Up 05:33:36 - 06:03:36 -2577
Fall River/Burney 05:48:41 -18.0 Dark Up 33.4 193.7 Up 05:33:41 - 06:03:41 -2625
Susanville 05:48:36 -18.9 Dark Up 33.9 194.6 Up 05:33:36 - 06:03:36 -2648
Gimple 05:48:36 -19.0 Dark Up 34.2 194.4 Up 05:33:36 - 06:03:36 -2668
Greenville 05:48:37 -19.0 Dark Up 34.2 194.3 Up 05:33:37 - 06:03:37 -2670
Portola 05:48:34 -19.5 Dark Up 34.4 194.9 Up 05:33:34 - 06:03:34 -2680
Quincy 05:48:36 -19.2 Dark Up 34.4 194.3 Up 05:33:36 - 06:03:36 -2682
Reno 05:48:31 -19.9 Dark Up 34.6 195.7 Up 05:33:31 - 06:03:31 -2685
Carson City 05:48:29 -20.3 Dark Up 34.9 195.8 Up 05:33:29 - 06:03:29 -2705
Yerington 05:48:25 -20.7 Dark Up 35.0 196.5 Up 05:33:25 - 06:03:25 -2706
Gardnerville 05:48:29 -20.5 Dark Up 35.1 195.9 Up 05:33:29 - 06:03:29 -2719
Hawthorne 05:48:22 -21.3 Dark Up 35.3 197.2 Up 05:33:22 - 06:03:22 -2725
Tonopah 05:48:15 -22.2 Dark Up 35.4 198.9 Up 05:33:15 - 06:03:15 -2729
Lee Vining 05:48:24 -21.6 Dark Up 35.9 196.8 Up 05:33:24 - 06:03:24 -2767
Bishop 05:48:19 -22.4 Dark Up 36.3 197.7 Up 05:33:19 - 06:03:19 -2792
Beatty 05:48:09 -23.4 Dark Up 36.4 199.7 Up 05:33:09 - 06:03:09 -2794
Indian Springs 05:48:04 -24.1 Dark Up 36.4 201.0 Up 05:33:04 - 06:03:04 -2796
Henderson 05:47:59 -24.8 Dark Up 36.7 201.9 Up 05:32:59 - 06:02:59 -2819
Lone Pine 05:48:15 -23.1 Dark Up 37.0 198.3 Up 05:33:15 - 06:03:15 -2834
Patrick 05:47:52 -25.8 Dark Up 36.9 203.3 Up 05:32:52 - 06:02:52 -2842
DCO 05:47:47 -26.3 Dark Up 37.0 204.2 Up 05:32:47 - 06:02:47 -2850
Searchlight/Boulder City 05:47:58 -25.4 Dark Up 37.2 202.1 Up 05:32:58 - 06:02:58 -2855
Kingman/Dolan Springs 05:47:52 -25.9 Dark Up 37.2 203.2 Up 05:32:52 - 06:02:52 -2859
Laughlin/Bullhead City 05:47:55 -25.8 Dark Up 37.4 202.6 Up 05:32:55 - 06:02:55 -2869
Mohave Valley 05:47:54 -26.0 Dark Up 37.6 202.7 Up 05:32:54 - 06:02:54 -2887
Lake Havasu City 05:47:52 -26.5 Dark Up 37.9 203.1 Up 05:32:52 - 06:02:52 -2909
Parker 05:47:51 -26.8 Dark Up 38.2 203.2 Up 05:32:51 - 06:02:51 -2932
CPSLO 05:48:26 -23.1 Dark Up 38.8 195.5 Up 05:33:26 - 06:03:26 -2965
Blythe 05:47:52 -27.1 Dark Up 38.8 203.0 Up 05:32:52 - 06:02:52 -2971
Idyllwild 05:48:02 -26.2 Dark Up 39.3 200.5 Up 05:33:02 - 06:03:02 -2998
Wildwood 05:48:12 -25.0 Dark Up 39.5 198.2 Up 05:33:12 - 06:03:12 -3007
Calipatria 05:47:55 -27.2 Dark Up 39.6 202.1 Up 05:32:55 - 06:02:55 -3020
Yuma 05:47:49 -27.9 Dark Up 39.7 203.3 Up 05:32:49 - 06:02:49 -3035

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 444018, (2019/06/18 05:48UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.73  73
27Bet Lib      15:17:00.3 -09:22:59  2.6 10.21  48
5 Lib          14:45:57.7 -15:27:34  6.5  1.57  53
PPM 229140     14:41:18.9 -13:55:43  8.5  0.57  55
PPM 229119     14:40:20.8 -14:23:46  9.8  0.15  55
444018         14:40:49.9 -14:29:21 14.9        55
Positions are for J2000

Event circumstances last updated at 2017/07/01 17:45:13 UT

Marc W. Buie, Southwest Research Institute

RECON