RECON: TNO occultation with 07LH38

Event between 07LH38 and star GA0840:08448207 with event index number of 2026153

Geocentric closest approach at 2023/06/01 05:25:42 UTC

J2000 position of star is 18:24:15.8 -05:33:50
Equinox of date position of star is 18:25:30.4 -05:32:59
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=23.5

[RECON map]
Object is 37.6 AU from the Sun and 36.7 AU from the Earth.
Apparent velocity is 20.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 415 seconds.
The 1-sigma cross-track error in the shadow position is 4920 km.
The sky-plane scale is 26610.5 km/arcsec.

The object has an absolute magnitude Hv=7.7
Diameter=171.4 km assuming a 5% albedo -- 8.2 sec chord
Diameter=70.0 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 07LH38, (2023/06/01 05:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.8 -26:28:55  0.9 34.43  37
60Bet Oph      17:44:37.8 +04:33:33  2.8 14.37  57
PPM 201808     18:31:29.4 -05:42:25  6.2  1.50  66
PPM 201703     18:24:39.0 -05:34:11  8.5  0.22  64
07LH38         18:25:30.8 -05:32:59 15.8        65
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 2.2 sigma about the mid-time.
The median site spacing is 33.3 km RECON observability=0.2 and success probability=4.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:28:07 -13.1 AT Up 18.2 126.0 Really Low 05:13:07 - 05:43:07 -306
Kamloops 05:28:37 -10.1 NT Up 11.1 113.4 Really Low 05:13:37 - 05:43:37 -475
Kelowna 05:28:39 -11.1 NT Up 12.0 113.9 Really Low 05:13:39 - 05:43:39 -524
Peachland 05:28:39 -11.1 NT Up 11.9 113.7 Really Low 05:13:39 - 05:43:39 -533
Summerland 05:28:40 -11.2 NT Up 12.0 113.7 Really Low 05:13:40 - 05:43:40 -542
Penticton 05:28:40 -11.3 NT Up 12.1 113.8 Really Low 05:13:40 - 05:43:40 -546
Oliver 05:28:41 -11.6 NT Up 12.2 113.7 Really Low 05:13:41 - 05:43:41 -570
Anarchist Mountain Observatory 05:28:42 -11.8 NT Up 12.4 113.9 Really Low 05:13:42 - 05:43:42 -580
Okanogan 05:28:44 -12.3 AT Up 12.5 113.6 Really Low 05:13:44 - 05:43:44 -627
Victoria 05:28:49 -10.7 NT Up 10.1 110.6 Really Low 05:13:49 - 05:43:49 -640
Brewster 05:28:45 -12.4 AT Up 12.5 113.4 Really Low 05:13:45 - 05:43:45 -647
Manson/Chelan 05:28:47 -12.5 AT Up 12.4 113.0 Really Low 05:13:47 - 05:43:47 -664
Wenatchee 05:28:49 -12.8 AT Up 12.5 112.8 Really Low 05:13:49 - 05:43:49 -699
Ellensburg 05:28:51 -13.0 AT Up 12.5 112.5 Really Low 05:13:51 - 05:43:51 -729
Yakima 05:28:52 -13.4 AT Up 12.7 112.4 Really Low 05:13:52 - 05:43:52 -759
Toppenish/White Swan 05:28:53 -13.6 AT Up 12.8 112.5 Really Low 05:13:53 - 05:43:53 -773
PNWRO 05:28:51 -14.5 AT Up 13.9 113.6 Really Low 05:13:51 - 05:43:51 -790
The Dalles 05:28:56 -13.9 AT Up 12.6 111.8 Really Low 05:13:56 - 05:43:56 -836
Maupin 05:28:58 -14.3 AT Up 12.9 111.8 Really Low 05:13:58 - 05:43:58 -866
Sisters 05:29:02 -14.8 AT Up 12.9 111.2 Really Low 05:14:02 - 05:44:02 -935
Bend 05:29:02 -15.1 AT Up 13.1 111.4 Really Low 05:14:02 - 05:44:02 -951
Oregon Observatory 05:29:03 -15.2 AT Up 13.1 111.2 Really Low 05:14:03 - 05:44:03 -965
Chiloquin 05:29:08 -16.1 AT Up 13.3 110.6 Really Low 05:14:08 - 05:44:08 -1069
Klamath Falls 05:29:09 -16.4 AT Up 13.5 110.6 Really Low 05:14:09 - 05:44:09 -1095
Cedarville 05:29:08 -17.7 AT Up 14.9 111.7 Really Low 05:14:08 - 05:44:08 -1139
Dunrhomin 05:28:40 -24.3 Dark Up 25.4 122.9 Low 05:13:40 - 05:43:40 -1142
Nikitin 05:28:40 -24.5 Dark Up 25.5 122.8 Low 05:13:40 - 05:43:40 -1157
CU-SBO 05:28:41 -24.5 Dark Up 25.5 122.7 Low 05:13:41 - 05:43:41 -1163
Fall River/Burney 05:29:12 -17.5 AT Up 14.2 110.7 Really Low 05:14:12 - 05:44:12 -1186
Gimple 05:29:14 -18.5 Dark Up 14.9 110.8 Really Low 05:14:14 - 05:44:14 -1256
Greenville 05:29:14 -18.4 Dark Up 14.8 110.8 Really Low 05:14:14 - 05:44:14 -1256
Quincy 05:29:15 -18.6 Dark Up 14.9 110.7 Really Low 05:14:15 - 05:44:15 -1272
Portola 05:29:14 -18.9 Dark Up 15.3 111.0 Really Low 05:14:14 - 05:44:14 -1279
Reno 05:29:14 -19.4 Dark Up 15.9 111.4 Really Low 05:14:14 - 05:44:14 -1296
Carson City 05:29:15 -19.7 Dark Up 16.0 111.3 Really Low 05:14:15 - 05:44:15 -1325
Yerington 05:29:15 -20.2 Dark Up 16.5 111.7 Really Low 05:14:15 - 05:44:15 -1337
Gardnerville 05:29:16 -19.9 Dark Up 16.1 111.3 Really Low 05:14:16 - 05:44:16 -1345
Hawthorne 05:29:15 -20.8 Dark Up 17.1 112.0 Really Low 05:14:15 - 05:44:15 -1371
Lee Vining 05:29:18 -21.0 Dark Up 17.0 111.5 Really Low 05:14:18 - 05:44:18 -1422
Bishop 05:29:18 -21.9 Dark Up 17.7 111.8 Really Low 05:14:18 - 05:44:18 -1467
Beatty 05:29:16 -23.0 Dark Up 19.1 112.8 Really Low 05:14:16 - 05:44:16 -1494
Patrick 05:29:14 -25.5 Dark Up 21.8 114.4 Low 05:14:14 - 05:44:14 -1601
Laughlin/Bullhead City 05:29:16 -25.4 Dark Up 21.4 113.8 Low 05:14:16 - 05:44:16 -1628
Lake Havasu City 05:29:17 -26.1 Dark Up 21.9 113.7 Low 05:14:17 - 05:44:17 -1684
George/Scottsdale 05:29:13 -27.8 Dark Up 24.0 115.2 Low 05:14:13 - 05:44:13 -1735
Wildwood 05:29:28 -24.4 Dark Up 18.8 110.7 Really Low 05:14:28 - 05:44:28 -1751
Idyllwild 05:29:25 -25.6 Dark Up 20.3 111.8 Low 05:14:25 - 05:44:25 -1768
Calipatria 05:29:24 -26.7 Dark Up 21.5 112.4 Low 05:14:24 - 05:44:24 -1814
Yuma 05:29:23 -27.5 Dark Up 22.4 112.9 Low 05:14:23 - 05:44:23 -1846

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 07LH38, (2023/06/01 05:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.43  37
60Bet Oph      17:43:28.3 +04:34:06  2.8 14.37  57
PPM 201808     18:30:14.3 -05:43:28  6.2  1.50  66
PPM 201703     18:23:24.0 -05:35:00  8.5  0.22  64
07LH38         18:24:15.8 -05:33:50 15.8        65
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:26:29 UT

Marc W. Buie, Southwest Research Institute

RECON