RECON: TNO occultation with 04EV95

Event between 04EV95 and star GA0780:04704166 with event index number of 1271502

Geocentric closest approach at 2024/04/13 05:55:49 UTC

J2000 position of star is 15:07:14.7 -10:04:35
Equinox of date position of star is 15:08:32.1 -10:10:01
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 142 degrees from the moon. Moon is 25% illuminated.
Apparent brightness V=24.0

[RECON map]
Object is 44.4 AU from the Sun and 43.5 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 521 seconds.
The 1-sigma cross-track error in the shadow position is 5639 km.
The sky-plane scale is 31539.7 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=193.2 km assuming a 5% albedo -- 8.4 sec chord
Diameter=78.9 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04EV95, (2024/04/13 05:56UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:28.6 -11:17:14  1.0 25.09 120
27Bet Lib      15:18:19.0 -09:28:16  2.6  2.50 143
19Del Lib      15:02:16.4 -08:36:50  4.9  2.20 140
PPM 229680     15:04:10.6 -10:29:12  7.5  1.12 141
PPM 198263     15:09:05.6 -09:55:47  9.5  0.27 142
04EV95         15:08:33.6 -10:10:07 16.9       142
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 1.7 sigma about the mid-time.
The median site spacing is 27.1 km RECON observability=0.3 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)
Sleaford 05:59:00 -27.1 Dark Up 18.6 137.0 Really Low 05:44:00 - 06:14:00 2418
Kamloops 05:59:28 -24.5 Dark Up 12.7 123.8 Really Low 05:44:28 - 06:14:28 1944
Kelowna 05:59:27 -25.5 Dark Up 13.6 124.5 Really Low 05:44:27 - 06:14:27 1898
Peachland 05:59:28 -25.4 Dark Up 13.5 124.2 Really Low 05:44:28 - 06:14:28 1882
Summerland 05:59:28 -25.6 Dark Up 13.6 124.2 Really Low 05:44:28 - 06:14:28 1872
Penticton 05:59:29 -25.7 Dark Up 13.7 124.3 Really Low 05:44:29 - 06:14:29 1869
Oliver 05:59:28 -26.0 Dark Up 13.9 124.2 Really Low 05:44:28 - 06:14:28 1840
Anarchist Mountain Observatory 05:59:28 -26.2 Dark Up 14.1 124.4 Really Low 05:44:28 - 06:14:28 1830
Okanogan 05:59:31 -26.7 Dark Up 14.4 124.1 Really Low 05:44:31 - 06:14:31 1770
Brewster 05:59:31 -26.8 Dark Up 14.4 123.8 Really Low 05:44:31 - 06:14:31 1742
Manson/Chelan 05:59:32 -26.9 Dark Up 14.3 123.5 Really Low 05:44:32 - 06:14:32 1715
Victoria 05:59:35 -25.1 Dark Up 12.2 120.9 Really Low 05:44:35 - 06:14:35 1688
Wenatchee 05:59:33 -27.2 Dark Up 14.5 123.2 Really Low 05:44:33 - 06:14:33 1670
Ellensburg 05:59:34 -27.5 Dark Up 14.6 123.0 Really Low 05:44:34 - 06:14:34 1629
Yakima 05:59:34 -27.8 Dark Up 14.8 122.9 Really Low 05:44:34 - 06:14:34 1593
PNWRO 05:59:33 -28.9 Dark Up 16.1 124.1 Really Low 05:44:33 - 06:14:33 1586
Toppenish/White Swan 05:59:34 -28.0 Dark Up 15.0 123.0 Really Low 05:44:34 - 06:14:34 1578
Dunrhomin 05:59:11 -38.5 Dark Up 27.4 134.2 Low 05:44:11 - 06:14:11 1499
The Dalles 05:59:37 -28.3 Dark Up 15.0 122.1 Really Low 05:44:37 - 06:14:37 1490
Nikitin 05:59:11 -38.6 Dark Up 27.5 134.1 Low 05:44:11 - 06:14:11 1483
CU-SBO 05:59:12 -38.7 Dark Up 27.5 134.0 Low 05:44:12 - 06:14:12 1474
Maupin 05:59:38 -28.7 Dark Up 15.3 122.1 Really Low 05:44:38 - 06:14:38 1456
Sisters 05:59:40 -29.2 Dark Up 15.4 121.5 Really Low 05:44:40 - 06:14:40 1364
Bend 05:59:39 -29.5 Dark Up 15.7 121.7 Really Low 05:44:39 - 06:14:39 1350
Oregon Observatory 05:59:40 -29.6 Dark Up 15.7 121.5 Really Low 05:44:40 - 06:14:40 1331
Chiloquin 05:59:42 -30.5 Dark Up 16.2 120.9 Really Low 05:44:42 - 06:14:42 1200
Klamath Falls 05:59:42 -30.8 Dark Up 16.4 120.9 Really Low 05:44:42 - 06:14:42 1171
Cedarville 05:59:41 -32.1 Dark Up 17.8 122.0 Really Low 05:44:41 - 06:14:41 1153
Fall River/Burney 05:59:44 -31.9 Dark Up 17.2 120.9 Really Low 05:44:44 - 06:14:44 1074
Gimple 05:59:44 -32.9 Dark Up 18.1 121.0 Really Low 05:44:44 - 06:14:44 1005
Greenville 05:59:44 -32.8 Dark Up 18.0 121.0 Really Low 05:44:44 - 06:14:44 1003
Portola 05:59:44 -33.3 Dark Up 18.5 121.3 Really Low 05:44:44 - 06:14:44 986
Quincy 05:59:44 -33.0 Dark Up 18.1 120.9 Really Low 05:44:44 - 06:14:44 984
Reno 05:59:43 -33.8 Dark Up 19.1 121.7 Really Low 05:44:43 - 06:14:43 980
Yerington 05:59:42 -34.6 Dark Up 19.8 122.0 Really Low 05:44:42 - 06:14:42 948
Carson City 05:59:43 -34.1 Dark Up 19.3 121.6 Really Low 05:44:43 - 06:14:43 948
Gardnerville 05:59:44 -34.4 Dark Up 19.4 121.6 Really Low 05:44:44 - 06:14:44 926
Hawthorne 05:59:42 -35.2 Dark Up 20.4 122.3 Low 05:44:42 - 06:14:42 921
Lee Vining 05:59:43 -35.4 Dark Up 20.4 121.7 Low 05:44:43 - 06:14:43 854
Beatty 05:59:40 -37.4 Dark Up 22.5 123.2 Low 05:44:40 - 06:14:40 826
Bishop 05:59:43 -36.3 Dark Up 21.2 122.1 Low 05:44:43 - 06:14:43 819
Patrick 05:59:35 -39.9 Dark Up 25.2 124.9 Low 05:44:35 - 06:14:35 780
Laughlin/Bullhead City 05:59:37 -39.8 Dark Up 24.9 124.3 Low 05:44:37 - 06:14:37 733
George/Scottsdale 05:59:31 -42.2 Dark Up 27.6 125.9 Low 05:44:31 - 06:14:31 687
Lake Havasu City 05:59:36 -40.5 Dark Up 25.5 124.2 Low 05:44:36 - 06:14:36 678
Idyllwild 05:59:42 -40.0 Dark Up 24.2 122.1 Low 05:44:42 - 06:14:42 528
Calipatria 05:59:40 -41.1 Dark Up 25.4 122.8 Low 05:44:40 - 06:14:40 508
Wildwood 05:59:46 -38.8 Dark Up 22.7 120.8 Low 05:44:46 - 06:14:46 501
Yuma 05:59:38 -41.8 Dark Up 26.3 123.3 Low 05:44:38 - 06:14:38 496

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 04EV95, (2024/04/13 05:56UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 25.09 120
27Bet Lib      15:17:00.3 -09:22:59  2.6  2.50 143
19Del Lib      15:00:58.3 -08:31:08  4.9  2.20 140
PPM 229680     15:02:51.6 -10:23:33  7.5  1.12 141
PPM 198263     15:07:46.8 -09:50:16  9.5  0.27 142
04EV95         15:07:14.7 -10:04:35 16.9       142
Positions are for J2000

Event circumstances last updated at 2023/11/04 04:10:26 UT

Marc W. Buie, Southwest Research Institute

RECON