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 05:50:20 UTC

J2000 position of star is 14:40:49.9 -14:29:21
Equinox of date position of star is 14:41:49.1 -14:33:55
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 167 seconds.
The 1-sigma cross-track error in the shadow position is 2184 km.
The sky-plane scale is 30328.2 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 05:50UT)
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 5.0 sigma about the mid-time.
The median site spacing is 11.3 km RECON observability=0.7 and success probability=5.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:50:52 -12.2 AT Up 25.3 195.3 Low 05:36:26 - 06:05:18 -2268
Tonasket 05:50:51 -12.4 AT Up 25.6 195.3 Low 05:36:25 - 06:05:17 -2278
Okanogan 05:50:51 -12.7 AT Up 25.9 195.2 Low 05:36:25 - 06:05:17 -2295
Brewster 05:50:52 -12.9 AT Up 26.2 195.0 Low 05:36:26 - 06:05:18 -2310
Manson/Chelan 05:50:53 -12.9 AT Up 26.5 194.7 Low 05:36:27 - 06:05:19 -2325
Entiat 05:50:54 -13.1 AT Up 26.7 194.6 Low 05:36:28 - 06:05:20 -2336
Wenatchee 05:50:53 -13.3 AT Up 27.0 194.6 Low 05:36:27 - 06:05:19 -2349
Ellensburg 05:50:54 -13.5 AT Up 27.4 194.4 Low 05:36:28 - 06:05:20 -2372
Pasco 05:50:45 -14.7 AT Up 27.9 196.0 Low 05:36:19 - 06:05:11 -2385
Yakima 05:50:53 -13.9 AT Up 27.8 194.4 Low 05:36:27 - 06:05:19 -2391
PNWRO 05:50:44 -15.0 AT Up 28.1 196.2 Low 05:36:18 - 06:05:10 -2394
Toppenish/White Swan 05:50:51 -14.1 AT Up 28.0 194.6 Low 05:36:25 - 06:05:17 -2399
George/Umatilla 05:50:46 -14.9 AT Up 28.2 195.8 Low 05:36:20 - 06:05:12 -2405
Goldendale 05:50:53 -14.4 AT Up 28.6 194.2 Low 05:36:27 - 06:05:19 -2432
The Dalles 05:50:54 -14.5 AT Up 28.9 193.9 Low 05:36:28 - 06:05:20 -2449
Maupin 05:50:52 -14.9 AT Up 29.2 194.0 Low 05:36:26 - 06:05:18 -2468
Madras/Culver 05:50:52 -15.3 AT Up 29.8 194.1 Low 05:36:26 - 06:05:18 -2497
Redmond 05:50:50 -15.6 AT Up 30.1 194.0 Up 05:36:24 - 06:05:16 -2516
Niwot 05:49:27 -24.3 Dark Up 29.4 211.7 Low 05:35:01 - 06:03:53 -2520
Sisters 05:50:53 -15.5 AT Up 30.2 193.6 Up 05:36:27 - 06:05:19 -2521
Bend 05:50:51 -15.8 AT Up 30.4 193.9 Up 05:36:25 - 06:05:17 -2529
Oregon Observatory 05:50:52 -15.9 AT Up 30.6 193.8 Up 05:36:26 - 06:05:18 -2541
La Pine/Gilchrist 05:50:51 -16.0 AT Up 30.8 193.8 Up 05:36:25 - 06:05:17 -2552
North Lake 05:50:48 -16.6 AT Up 31.1 194.5 Up 05:36:22 - 06:05:14 -2565
Paisley 05:50:46 -17.2 AT Up 31.6 195.0 Up 05:36:20 - 06:05:12 -2589
Lakeview 05:50:43 -17.7 AT Up 32.0 195.2 Up 05:36:17 - 06:05:09 -2613
Chiloquin 05:50:50 -16.8 AT Up 31.9 193.5 Up 05:36:24 - 06:05:16 -2618
Klamath Falls 05:50:50 -17.1 AT Up 32.2 193.7 Up 05:36:24 - 06:05:16 -2635
Tulelake 05:50:48 -17.5 AT Up 32.4 194.0 Up 05:36:22 - 06:05:14 -2645
Cedarville 05:50:42 -18.3 Dark Up 32.6 195.5 Up 05:36:16 - 06:05:08 -2647
Fall River/Burney 05:50:47 -18.3 Dark Up 33.3 194.3 Up 05:36:21 - 06:05:13 -2695
Susanville 05:50:41 -19.1 Dark Up 33.8 195.2 Up 05:36:15 - 06:05:07 -2718
Gimple 05:50:42 -19.2 Dark Up 34.1 195.0 Up 05:36:16 - 06:05:08 -2738
Greenville 05:50:42 -19.2 Dark Up 34.1 194.9 Up 05:36:16 - 06:05:08 -2739
Portola 05:50:39 -19.7 Dark Up 34.3 195.5 Up 05:36:13 - 06:05:05 -2750
Quincy 05:50:42 -19.4 Dark Up 34.3 194.9 Up 05:36:16 - 06:05:08 -2751
Reno 05:50:36 -20.2 Dark Up 34.5 196.3 Up 05:36:10 - 06:05:02 -2754
Carson City 05:50:35 -20.5 Dark Up 34.8 196.4 Up 05:36:09 - 06:05:01 -2775
Yerington 05:50:32 -20.9 Dark Up 34.8 197.1 Up 05:36:06 - 06:04:58 -2776
Gardnerville 05:50:34 -20.7 Dark Up 35.0 196.5 Up 05:36:08 - 06:05:00 -2789
Hawthorne 05:50:28 -21.5 Dark Up 35.2 197.8 Up 05:36:02 - 06:04:54 -2795
Tonopah 05:50:20 -22.4 Dark Up 35.3 199.5 Up 05:35:54 - 06:04:46 -2799
Lee Vining 05:50:29 -21.8 Dark Up 35.8 197.4 Up 05:36:03 - 06:04:55 -2837
Bishop 05:50:25 -22.6 Dark Up 36.2 198.3 Up 05:35:59 - 06:04:51 -2862
Beatty 05:50:15 -23.6 Dark Up 36.2 200.3 Up 05:35:49 - 06:04:41 -2863
Indian Springs 05:50:09 -24.3 Dark Up 36.2 201.6 Up 05:35:43 - 06:04:35 -2866
Henderson 05:50:04 -25.0 Dark Up 36.5 202.5 Up 05:35:38 - 06:04:30 -2889
Lone Pine 05:50:21 -23.4 Dark Up 36.9 198.9 Up 05:35:55 - 06:04:47 -2904
Patrick 05:49:57 -26.0 Dark Up 36.8 203.9 Up 05:35:31 - 06:04:23 -2911
DCO 05:49:52 -26.5 Dark Up 36.8 204.8 Up 05:35:26 - 06:04:18 -2920
Searchlight/Boulder City 05:50:03 -25.6 Dark Up 37.0 202.7 Up 05:35:37 - 06:04:29 -2924
Kingman/Dolan Springs 05:49:57 -26.1 Dark Up 37.0 203.8 Up 05:35:31 - 06:04:23 -2928
Laughlin/Bullhead City 05:50:00 -26.0 Dark Up 37.2 203.2 Up 05:35:34 - 06:04:26 -2938
Mohave Valley 05:49:59 -26.2 Dark Up 37.5 203.3 Up 05:35:33 - 06:04:25 -2956
Lake Havasu City 05:49:57 -26.7 Dark Up 37.7 203.7 Up 05:35:31 - 06:04:23 -2978
Parker 05:49:56 -27.0 Dark Up 38.1 203.8 Up 05:35:30 - 06:04:22 -3000
CPSLO 05:50:32 -23.4 Dark Up 38.7 196.1 Up 05:36:06 - 06:04:58 -3033
Blythe 05:49:56 -27.3 Dark Up 38.6 203.6 Up 05:35:30 - 06:04:22 -3040
Idyllwild 05:50:08 -26.4 Dark Up 39.2 201.2 Up 05:35:42 - 06:04:34 -3067
Wildwood 05:50:18 -25.3 Dark Up 39.4 198.9 Up 05:35:52 - 06:04:44 -3076
Calipatria 05:50:01 -27.4 Dark Up 39.4 202.7 Up 05:35:35 - 06:04:27 -3089
Yuma 05:49:55 -28.1 Dark Up 39.5 203.9 Up 05:35:29 - 06:04:21 -3103

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 05:50UT)
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 2017/12/06 19:02:29 UT

Marc W. Buie, Southwest Research Institute

RECON