RECON: TNO occultation with 07HV90

Event between 07HV90 and star GA0660:13089051 with event index number of 2019833

Geocentric closest approach at 2024/05/08 07:53:02 UTC

J2000 position of star is 17:26:31.3 -22:49:35
Equinox of date position of star is 17:27:57.9 -22:50:43
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 148 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.8

[RECON map]
Object is 41.8 AU from the Sun and 41.0 AU from the Earth.
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 1276 seconds.
The 1-sigma cross-track error in the shadow position is 3532 km.
The sky-plane scale is 29729.5 km/arcsec.

The object has an absolute magnitude Hv=6.5
Diameter=296.5 km assuming a 5% albedo -- 15.3 sec chord
Diameter=121.0 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 07HV90, (2024/05/08 07:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.3 -26:29:02  0.9 13.46 161
35Eta Oph      17:11:46.6 -15:45:12  2.6  8.06 151
44 Oph         17:27:51.6 -24:11:43  4.2  1.35 148
PPM 266859     17:27:29.9 -23:11:30  8.4  0.36 148
07HV90         17:27:59.8 -22:50:44 16.1       148
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 0.7 sigma about the mid-time.
The median site spacing is 14.8 km RECON observability=0.3 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:54:34 -19.7 Dark Down 12.6 159.0 Really Low 07:39:34 - 08:09:34 5578
Kamloops 07:55:20 -22.1 Dark Down 9.8 146.2 Really Low 07:40:20 - 08:10:20 5293
Kelowna 07:55:20 -22.9 Dark Down 10.7 146.9 Really Low 07:40:20 - 08:10:20 5277
Peachland 07:55:21 -23.0 Dark Down 10.7 146.6 Really Low 07:40:21 - 08:10:21 5267
Summerland 07:55:21 -23.1 Dark Down 10.9 146.7 Really Low 07:40:21 - 08:10:21 5262
Penticton 07:55:21 -23.2 Dark Down 11.0 146.8 Really Low 07:40:21 - 08:10:21 5261
Oliver 07:55:21 -23.6 Dark Down 11.3 146.7 Really Low 07:40:21 - 08:10:21 5246
Anarchist Mountain Observatory 07:55:22 -23.7 Dark Down 11.5 146.9 Really Low 07:40:22 - 08:10:22 5243
Okanogan 07:55:24 -24.4 Dark Down 12.0 146.6 Really Low 07:40:24 - 08:10:24 5210
Brewster 07:55:25 -24.7 Dark Down 12.1 146.4 Really Low 07:40:25 - 08:10:25 5194
Manson/Chelan 07:55:27 -24.9 Dark Down 12.2 146.1 Really Low 07:40:27 - 08:10:27 5178
Wenatchee 07:55:28 -25.3 Dark Down 12.5 145.9 Really Low 07:40:28 - 08:10:28 5152
Victoria 07:55:34 -24.1 Dark Down 10.4 143.4 Really Low 07:40:34 - 08:10:34 5140
Ellensburg 07:55:29 -25.7 Dark Down 12.7 145.6 Really Low 07:40:29 - 08:10:29 5129
PNWRO 07:55:26 -26.7 Dark Down 14.2 146.9 Really Low 07:40:26 - 08:10:26 5116
Yakima 07:55:31 -26.2 Dark Down 13.1 145.6 Really Low 07:40:31 - 08:10:31 5109
Toppenish/White Swan 07:55:30 -26.4 Dark Down 13.3 145.7 Really Low 07:40:30 - 08:10:30 5102
Dunrhomin 07:54:48 -30.9 Dark Down 23.8 158.4 Low 07:39:48 - 08:09:48 5076
Nikitin 07:54:48 -31.1 Dark Down 24.0 158.3 Low 07:39:48 - 08:09:48 5066
CU-SBO 07:54:48 -31.2 Dark Down 24.0 158.2 Low 07:39:48 - 08:09:48 5062
The Dalles 07:55:35 -27.1 Dark Down 13.6 144.9 Really Low 07:40:35 - 08:10:35 5048
Maupin 07:55:36 -27.6 Dark Down 14.0 145.0 Really Low 07:40:36 - 08:10:36 5030
Sisters 07:55:39 -28.4 Dark Down 14.6 144.4 Really Low 07:40:39 - 08:10:39 4975
Bend 07:55:39 -28.7 Dark Down 14.9 144.6 Really Low 07:40:39 - 08:10:39 4968
Oregon Observatory 07:55:39 -28.8 Dark Down 14.9 144.5 Really Low 07:40:39 - 08:10:39 4956
Chiloquin 07:55:44 -30.1 Dark Down 15.8 143.9 Really Low 07:40:44 - 08:10:44 4877
Klamath Falls 07:55:44 -30.5 Dark Down 16.2 143.9 Really Low 07:40:44 - 08:10:44 4860
Cedarville 07:55:41 -31.2 Dark Down 17.4 145.2 Really Low 07:40:41 - 08:10:41 4858
Fall River/Burney 07:55:46 -31.7 Dark Down 17.3 144.1 Really Low 07:40:46 - 08:10:46 4802
Gimple 07:55:46 -32.6 Dark Down 18.3 144.3 Really Low 07:40:46 - 08:10:46 4763
Greenville 07:55:46 -32.6 Dark Down 18.2 144.3 Really Low 07:40:46 - 08:10:46 4761
Portola 07:55:45 -32.9 Dark Down 18.7 144.6 Really Low 07:40:45 - 08:10:45 4753
Reno 07:55:44 -33.2 Dark Down 19.2 145.1 Really Low 07:40:44 - 08:10:44 4752
Quincy 07:55:46 -32.8 Dark Down 18.4 144.2 Really Low 07:40:46 - 08:10:46 4749
Yerington 07:55:43 -33.8 Dark Down 19.9 145.6 Really Low 07:40:43 - 08:10:43 4735
Carson City 07:55:44 -33.6 Dark Down 19.5 145.1 Really Low 07:40:44 - 08:10:44 4732
Hawthorne 07:55:41 -34.2 Dark Down 20.6 145.9 Low 07:40:41 - 08:10:41 4719
Gardnerville 07:55:44 -33.8 Dark Down 19.7 145.1 Really Low 07:40:44 - 08:10:44 4718
Lee Vining 07:55:44 -34.8 Dark Down 20.8 145.4 Low 07:40:44 - 08:10:44 4674
Beatty 07:55:38 -35.8 Dark Down 22.7 147.2 Low 07:40:38 - 08:10:38 4662
Bishop 07:55:43 -35.4 Dark Down 21.6 145.9 Low 07:40:43 - 08:10:43 4654
Patrick 07:55:29 -37.0 Dark Down 25.2 149.4 Low 07:40:29 - 08:10:29 4632
Laughlin/Bullhead City 07:55:32 -37.3 Dark Down 25.1 148.7 Low 07:40:32 - 08:10:32 4601
George/Scottsdale 07:55:23 -38.5 Dark Down 27.5 150.8 Low 07:40:23 - 08:10:23 4565
Lake Havasu City 07:55:32 -38.0 Dark Down 25.8 148.8 Low 07:40:32 - 08:10:32 4563
Idyllwild 07:55:43 -38.9 Dark Down 25.4 146.5 Low 07:40:43 - 08:10:43 4461
Calipatria 07:55:39 -39.5 Dark Down 26.5 147.4 Low 07:40:39 - 08:10:39 4446
Wildwood 07:55:49 -38.6 Dark Down 24.2 144.9 Low 07:40:49 - 08:10:49 4439
Yuma 07:55:36 -39.8 Dark Down 27.2 148.0 Low 07:40:36 - 08:10:36 4437

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 07HV90, (2024/05/08 07:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.46 161
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.06 151
44 Oph         17:26:22.2 -24:10:34  4.2  1.35 148
PPM 266859     17:26:01.2 -23:10:19  8.4  0.36 148
07HV90         17:26:31.3 -22:49:35 16.1       148
Positions are for J2000

Event circumstances last updated at 2023/11/04 04:11:33 UT

Marc W. Buie, Southwest Research Institute

RECON