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 04:18:32 UTC

J2000 position of star is 14:42:13.3 -15:40:20
Equinox of date position of star is 14:43:12.8 -15:44:52
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 366 seconds.
The 1-sigma cross-track error in the shadow position is 1916 km.
The sky-plane scale is 31837.8 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 04:19UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.4 -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     14:41:58.6 -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 2.5 sigma about the mid-time.
The median site spacing is 48.6 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 04:19:52 -3.1 CT Up 24.5 192.5 Low 04:04:52 - 04:34:52 8895
Tonasket 04:19:51 -3.3 CT Up 24.8 192.5 Low 04:04:51 - 04:34:51 8885
Okanogan 04:19:52 -3.4 CT Up 25.1 192.4 Low 04:04:52 - 04:34:52 8869
Brewster 04:19:51 -3.5 CT Up 25.4 192.2 Low 04:04:51 - 04:34:51 8854
Manson/Chelan 04:19:54 -3.4 CT Up 25.7 191.9 Low 04:04:54 - 04:34:54 8839
Entiat 04:19:56 -3.5 CT Up 25.9 191.8 Low 04:04:56 - 04:34:56 8828
Wenatchee 04:19:53 -3.6 CT Up 26.2 191.7 Low 04:04:53 - 04:34:53 8815
Ellensburg 04:19:53 -3.8 CT Up 26.6 191.5 Low 04:04:53 - 04:34:53 8793
Pasco 04:19:40 -5.0 CT Up 27.1 193.1 Low 04:04:40 - 04:34:40 8781
Yakima 04:19:51 -4.0 CT Up 27.0 191.5 Low 04:04:51 - 04:34:51 8774
PNWRO 04:19:37 -5.3 CT Up 27.3 193.3 Low 04:04:37 - 04:34:37 8773
Toppenish/White Swan 04:19:53 -4.3 CT Up 27.2 191.8 Low 04:04:53 - 04:34:53 8767
George/Umatilla 04:19:41 -5.1 CT Up 27.5 192.9 Low 04:04:41 - 04:34:41 8762
Goldendale 04:19:55 -4.4 CT Up 27.8 191.4 Low 04:04:55 - 04:34:55 8734
The Dalles 04:19:56 -4.3 CT Up 28.1 191.0 Low 04:04:56 - 04:34:56 8717
Maupin 04:19:52 -4.6 CT Up 28.5 191.1 Low 04:04:52 - 04:34:52 8698
Madras/Culver 04:19:52 -5.0 CT Up 29.0 191.1 Low 04:04:52 - 04:34:52 8671
Niwot 04:17:19 -16.2 AT Up 29.4 208.3 Low 04:02:19 - 04:32:19 8661
Redmond 04:19:55 -5.2 CT Up 29.4 191.1 Low 04:04:55 - 04:34:55 8652
Sisters 04:19:53 -4.9 CT Up 29.4 190.7 Low 04:04:53 - 04:34:53 8646
Bend 04:19:49 -5.2 CT Up 29.6 191.0 Low 04:04:49 - 04:34:49 8639
Oregon Observatory 04:19:51 -5.2 CT Up 29.8 190.9 Low 04:04:51 - 04:34:51 8627
La Pine/Gilchrist 04:19:52 -5.3 CT Up 30.0 190.8 Low 04:04:52 - 04:34:52 8616
North Lake 04:19:45 -5.9 CT Up 30.3 191.5 Up 04:04:45 - 04:34:45 8604
Paisley 04:19:42 -6.5 CT Up 30.8 192.0 Up 04:04:42 - 04:34:42 8581
Lakeview 04:19:37 -6.9 CT Up 31.3 192.2 Up 04:04:37 - 04:34:37 8557
Chiloquin 04:19:51 -5.8 CT Up 31.1 190.5 Up 04:04:51 - 04:34:51 8551
Klamath Falls 04:19:49 -6.1 CT Up 31.5 190.7 Up 04:04:49 - 04:34:49 8534
Tulelake 04:19:47 -6.4 CT Up 31.7 191.0 Up 04:04:47 - 04:34:47 8525
Cedarville 04:19:32 -7.4 CT Up 31.9 192.5 Up 04:04:32 - 04:34:32 8525
Fall River/Burney 04:19:43 -7.0 CT Up 32.6 191.2 Up 04:04:43 - 04:34:43 8476
Susanville 04:19:32 -7.8 CT Up 33.1 192.1 Up 04:04:32 - 04:34:32 8454
Gimple 04:19:35 -7.9 CT Up 33.4 191.9 Up 04:04:35 - 04:34:35 8435
Greenville 04:19:36 -7.8 CT Up 33.4 191.8 Up 04:04:36 - 04:34:36 8433
Portola 04:19:30 -8.3 CT Up 33.6 192.4 Up 04:04:30 - 04:34:30 8423
Quincy 04:19:34 -7.9 CT Up 33.6 191.8 Up 04:04:34 - 04:34:34 8422
Reno 04:19:24 -8.8 CT Up 33.8 193.1 Up 04:04:24 - 04:34:24 8419
Carson City 04:19:23 -9.1 CT Up 34.1 193.2 Up 04:04:23 - 04:34:23 8399
Yerington 04:19:16 -9.6 CT Up 34.2 193.9 Up 04:04:16 - 04:34:16 8399
Gardnerville 04:19:21 -9.2 CT Up 34.4 193.3 Up 04:04:21 - 04:34:21 8385
Hawthorne 04:19:10 -10.2 CT Up 34.6 194.6 Up 04:04:10 - 04:34:10 8381
Tonopah 04:19:00 -11.3 CT Up 34.7 196.2 Up 04:04:00 - 04:34:00 8377
Lee Vining 04:19:11 -10.2 CT Up 35.2 194.1 Up 04:04:11 - 04:34:11 8338
Indian Springs 04:19:00 -13.2 AT Up 35.8 198.3 Up 04:04:00 - 04:34:00 8316
Beatty 04:19:00 -12.3 AT Up 35.7 197.0 Up 04:04:00 - 04:34:00 8316
Bishop 04:19:00 -11.0 CT Up 35.6 195.0 Up 04:04:00 - 04:34:00 8315
Henderson 04:18:26 -13.9 AT Up 36.1 199.1 Up 04:03:26 - 04:33:26 8291
Lone Pine 04:19:01 -11.7 CT Up 36.3 195.5 Up 04:04:01 - 04:34:01 8274
Patrick 04:18:14 -14.9 AT Up 36.4 200.4 Up 04:03:14 - 04:33:14 8270
DCO 04:18:05 -15.5 AT Up 36.5 201.3 Up 04:03:05 - 04:33:05 8262
Searchlight/Boulder City 04:18:21 -14.3 AT Up 36.7 199.2 Up 04:03:21 - 04:33:21 8256
Kingman/Dolan Springs 04:18:16 -15.0 AT Up 36.7 200.3 Up 04:03:16 - 04:33:16 8253
Laughlin/Bullhead City 04:18:18 -14.7 AT Up 36.9 199.7 Up 04:03:18 - 04:33:18 8243
Mohave Valley 04:18:17 -14.9 AT Up 37.1 199.8 Up 04:03:17 - 04:33:17 8226
Lake Havasu City 04:18:14 -15.3 AT Up 37.4 200.2 Up 04:03:14 - 04:33:14 8204
Parker 04:18:12 -15.5 AT Up 37.8 200.3 Up 04:03:12 - 04:33:12 8182
CPSLO 04:19:17 -10.9 CT Up 38.1 192.8 Up 04:04:17 - 04:34:17 8144
Blythe 04:18:13 -15.7 AT Up 38.3 200.1 Up 04:03:13 - 04:33:13 8142
Idyllwild 04:19:00 -14.4 AT Up 38.7 197.8 Up 04:04:00 - 04:34:00 8117
Wildwood 04:19:00 -13.0 AT Up 38.8 195.4 Up 04:04:00 - 04:34:00 8104
Calipatria 04:18:19 -15.4 AT Up 39.1 199.1 Up 04:03:19 - 04:33:19 8094
Yuma 04:18:05 -16.2 AT Up 39.2 200.2 Up 04:03:05 - 04:33:05 8080

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 04:19UT)
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 2017/12/06 19:07:12 UT

Marc W. Buie, Southwest Research Institute

RECON