RECON: TNO occultation with 444025

Event between (444025) 04HJ79 and star UC4-372-067690 with event index number of 205844

Geocentric closest approach at 2019/07/09 04:17:50 UTC

J2000 position of star is 14:42:13.3 -15:40:20
Equinox of date position of star is 14:43:11.7 -15:44:47
Stellar brightness R=15.9, use SENSEUP=128
Star is 30 degrees from the moon. Moon is 47% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 44.4 AU from the Sun and 43.9 AU from the Earth.
The TNO is moving 8.6 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 388 seconds.
The 1-sigma cross-track error in the shadow position is 1960 km.
The sky-plane scale is 31837.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 29.2 sec chord
Diameter=102.6 km assuming a 30% albedo -- 11.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 444025, (2019/07/09 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.5 -11:15:45  1.0 19.26  13
27Bet Lib      15:18:03.6 -09:27:14  2.6 10.56  36
5 Lib          14:47:02.5 -15:32:27  6.5  0.93  31
PPM 229130     14:41:58.7 -15:24:12  8.5  0.47  30
PPM 229178     14:43:38.0 -15:55:12  9.7  0.18  30
444025         14:43:18.1 -15:45:16 15.9        31
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 2.3 sigma about the mid-time.
The median site spacing is 48.7 km RECON observability=0.1 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:19:10 -3.0 CT Up 24.6 192.3 Low 04:04:10 - 04:34:10 9131
Tonasket 04:19:09 -3.2 CT Up 24.8 192.3 Low 04:04:09 - 04:34:09 9121
Okanogan 04:19:14 -3.3 CT Up 25.1 192.2 Low 04:04:14 - 04:34:14 9105
Brewster 04:19:10 -3.4 CT Up 25.4 192.0 Low 04:04:10 - 04:34:10 9090
Manson/Chelan 04:19:09 -3.3 CT Up 25.7 191.7 Low 04:04:09 - 04:34:09 9075
Entiat 04:19:12 -3.4 CT Up 25.9 191.6 Low 04:04:12 - 04:34:12 9064
Wenatchee 04:19:11 -3.6 CT Up 26.2 191.5 Low 04:04:11 - 04:34:11 9051
Ellensburg 04:19:11 -3.7 CT Up 26.6 191.3 Low 04:04:11 - 04:34:11 9029
Pasco 04:19:01 -4.9 CT Up 27.1 192.9 Low 04:04:01 - 04:34:01 9017
Yakima 04:19:09 -3.9 CT Up 27.0 191.4 Low 04:04:09 - 04:34:09 9010
PNWRO 04:19:00 -5.2 CT Up 27.4 193.2 Low 04:04:00 - 04:34:00 9010
Toppenish/White Swan 04:19:08 -4.2 CT Up 27.2 191.6 Low 04:04:08 - 04:34:08 9003
George/Umatilla 04:19:00 -5.0 CT Up 27.5 192.7 Low 04:04:00 - 04:34:00 8998
Goldendale 04:19:11 -4.3 CT Up 27.8 191.2 Low 04:04:11 - 04:34:11 8970
The Dalles 04:19:12 -4.2 CT Up 28.1 190.8 Low 04:04:12 - 04:34:12 8953
Maupin 04:19:12 -4.5 CT Up 28.5 191.0 Low 04:04:12 - 04:34:12 8934
Madras/Culver 04:19:07 -4.9 CT Up 29.0 190.9 Low 04:04:07 - 04:34:07 8907
Niwot 04:16:35 -16.1 AT Up 29.5 208.1 Low 04:01:35 - 04:31:35 8898
Redmond 04:19:05 -5.0 CT Up 29.4 190.9 Low 04:04:05 - 04:34:05 8888
Sisters 04:19:11 -4.8 CT Up 29.4 190.5 Low 04:04:11 - 04:34:11 8883
Bend 04:19:08 -5.1 CT Up 29.6 190.8 Low 04:04:08 - 04:34:08 8875
Oregon Observatory 04:19:09 -5.1 CT Up 29.8 190.7 Low 04:04:09 - 04:34:09 8864
La Pine/Gilchrist 04:19:10 -5.2 CT Up 30.0 190.6 Up 04:04:10 - 04:34:10 8853
North Lake 04:19:03 -5.8 CT Up 30.4 191.3 Up 04:04:03 - 04:34:03 8841
Paisley 04:19:01 -6.4 CT Up 30.8 191.8 Up 04:04:01 - 04:34:01 8818
Lakeview 04:19:00 -6.8 CT Up 31.3 192.0 Up 04:04:00 - 04:34:00 8795
Chiloquin 04:19:08 -5.7 CT Up 31.1 190.4 Up 04:04:08 - 04:34:08 8788
Klamath Falls 04:19:04 -6.0 CT Up 31.5 190.5 Up 04:04:04 - 04:34:04 8771
Cedarville 04:19:00 -7.3 CT Up 31.9 192.3 Up 04:04:00 - 04:34:00 8762
Tulelake 04:19:05 -6.3 CT Up 31.7 190.8 Up 04:04:05 - 04:34:05 8762
Fall River/Burney 04:19:00 -6.9 CT Up 32.6 191.0 Up 04:04:00 - 04:34:00 8713
Susanville 04:19:00 -7.7 CT Up 33.1 191.9 Up 04:04:00 - 04:34:00 8692
Gimple 04:19:00 -7.8 CT Up 33.4 191.7 Up 04:04:00 - 04:34:00 8672
Greenville 04:19:00 -7.7 CT Up 33.4 191.6 Up 04:04:00 - 04:34:00 8670
Portola 04:19:00 -8.2 CT Up 33.7 192.2 Up 04:04:00 - 04:34:00 8661
Quincy 04:19:01 -7.8 CT Up 33.6 191.7 Up 04:04:01 - 04:34:01 8659
Reno 04:19:00 -8.8 CT Up 33.8 193.0 Up 04:04:00 - 04:34:00 8658
Carson City 04:19:00 -9.0 CT Up 34.1 193.1 Up 04:04:00 - 04:34:00 8638
Yerington 04:18:33 -9.4 CT Up 34.2 193.7 Up 04:03:33 - 04:33:33 8636
Gardnerville 04:19:00 -9.2 CT Up 34.4 193.2 Up 04:04:00 - 04:34:00 8625
Hawthorne 04:18:28 -10.0 CT Up 34.6 194.4 Up 04:03:28 - 04:33:28 8617
Tonopah 04:18:11 -11.2 CT Up 34.8 196.0 Up 04:03:11 - 04:33:11 8614
Lee Vining 04:18:25 -10.1 CT Up 35.2 193.9 Up 04:03:25 - 04:33:25 8576
Bishop 04:18:21 -10.9 CT Up 35.7 194.8 Up 04:03:21 - 04:33:21 8552
Beatty 04:18:02 -12.2 AT Up 35.8 196.7 Up 04:03:02 - 04:33:02 8551
Indian Springs 04:17:50 -13.0 AT Up 35.9 198.0 Up 04:02:50 - 04:32:50 8549
Henderson 04:17:39 -13.7 AT Up 36.2 198.8 Up 04:02:39 - 04:32:39 8527
Lone Pine 04:18:14 -11.6 CT Up 36.4 195.3 Up 04:03:14 - 04:33:14 8511
Patrick 04:17:29 -14.8 AT Up 36.5 200.2 Up 04:02:29 - 04:32:29 8506
DCO 04:17:18 -15.4 AT Up 36.6 201.1 Up 04:02:18 - 04:32:18 8498
Searchlight/Boulder City 04:17:42 -14.2 AT Up 36.7 199.1 Up 04:02:42 - 04:32:42 8493
Kingman/Dolan Springs 04:17:34 -14.9 AT Up 36.8 200.1 Up 04:02:34 - 04:32:34 8489
Laughlin/Bullhead City 04:17:32 -14.6 AT Up 36.9 199.5 Up 04:02:32 - 04:32:32 8479
Mohave Valley 04:17:34 -14.7 AT Up 37.2 199.6 Up 04:02:34 - 04:32:34 8462
Lake Havasu City 04:17:32 -15.2 AT Up 37.5 200.0 Up 04:02:32 - 04:32:32 8440
Parker 04:17:27 -15.4 AT Up 37.8 200.1 Up 04:02:27 - 04:32:27 8417
CPSLO 04:18:32 -10.8 CT Up 38.1 192.6 Up 04:03:32 - 04:33:32 8380
Blythe 04:17:27 -15.6 AT Up 38.4 199.8 Up 04:02:27 - 04:32:27 8378
Idyllwild 04:17:52 -14.2 AT Up 38.8 197.4 Up 04:02:52 - 04:32:52 8351
Wildwood 04:18:07 -12.8 AT Up 38.9 195.2 Up 04:03:07 - 04:33:07 8340
Calipatria 04:17:37 -15.3 AT Up 39.1 198.9 Up 04:02:37 - 04:32:37 8330
Yuma 04:17:27 -16.1 AT Up 39.3 200.1 Up 04:02:27 - 04:32:27 8316

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 444025, (2019/07/09 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 19.26  13
27Bet Lib      15:17:00.3 -09:22:59  2.6 10.56  36
5 Lib          14:45:57.7 -15:27:34  6.5  0.93  31
PPM 229130     14:40:54.0 -15:19:14  8.5  0.47  30
PPM 229178     14:42:33.1 -15:50:16  9.7  0.18  30
444025         14:42:13.3 -15:40:20 15.9        30
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:09:26 UT

Marc W. Buie, Southwest Research Institute

RECON