RECON: TNO occultation with 48639

Event between (48639) 95TL8 and star GA1100:00467804 with event index number of 2381552

Geocentric closest approach at 2024/11/15 08:24:22 UTC

J2000 position of star is 03:53:49.1 +20:21:58
Equinox of date position of star is 03:55:13.2 +20:26:09
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 15 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 46.8 AU from the Sun and 45.8 AU from the Earth.
Apparent velocity is 25.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 1699 km.
The sky-plane scale is 33248.4 km/arcsec.

The object has an absolute magnitude Hv=4.9
Diameter=625.2 km assuming a 5% albedo -- 25.1 sec chord
Diameter=255.2 km assuming a 30% albedo -- 10.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 48639, (2024/11/15 08:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.0 +16:33:27  0.8 10.70  25
44Zet Per      03:55:42.1 +31:57:20  2.8 11.52  19
PPM 092958     03:51:23.1 +22:19:05  5.9  2.09  14
PPM 092931     03:50:27.6 +21:25:01  8.5  1.49  14
PPM 093057     03:56:25.3 +20:57:11  9.4  0.58  15
PPM 093039     03:55:24.2 +20:39:48 10.3  0.23  15
48639          03:55:16.2 +20:26:18 15.6        15
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 5.0 sigma about the mid-time.
The median site spacing is 33.8 km RECON observability=1.0 and success probability=36.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:23:51 -57.1 Dark Up 59.7 183.8 Up 08:16:15 - 08:31:27 -175
Sleaford 08:23:12 -51.7 Dark Up 55.8 208.0 Up 08:15:36 - 08:30:48 -190
Kelowna 08:23:49 -57.7 Dark Up 60.4 185.6 Up 08:16:13 - 08:31:25 -265
Peachland 08:23:50 -57.9 Dark Up 60.5 185.1 Up 08:16:14 - 08:31:26 -271
Summerland 08:23:49 -58.0 Dark Up 60.7 185.3 Up 08:16:13 - 08:31:25 -287
Penticton 08:23:49 -58.0 Dark Up 60.7 185.5 Up 08:16:13 - 08:31:25 -295
Oliver 08:23:49 -58.4 Dark Up 61.1 185.6 Up 08:16:13 - 08:31:25 -329
Victoria 08:24:01 -59.7 Dark Up 61.8 178.1 Up 08:16:25 - 08:31:37 -335
Anarchist Mountain Observatory 08:23:49 -58.5 Dark Up 61.3 186.0 Up 08:16:13 - 08:31:25 -348
Okanogan 08:23:50 -59.1 Dark Up 61.9 185.7 Up 08:16:14 - 08:31:26 -407
Brewster 08:23:51 -59.4 Dark Up 62.2 185.3 Up 08:16:15 - 08:31:27 -431
Manson/Chelan 08:23:52 -59.7 Dark Up 62.4 184.6 Up 08:16:16 - 08:31:28 -446
Wenatchee 08:23:53 -60.2 Dark Up 62.9 184.3 Up 08:16:17 - 08:31:29 -489
Ellensburg 08:23:54 -60.6 Dark Up 63.3 183.9 Up 08:16:18 - 08:31:30 -526
Yakima 08:23:54 -61.0 Dark Up 63.7 184.0 Up 08:16:18 - 08:31:30 -566
Toppenish/White Swan 08:23:54 -61.2 Dark Up 63.9 184.4 Up 08:16:18 - 08:31:30 -590
PNWRO 08:23:50 -61.2 Dark Up 64.2 187.6 Up 08:16:14 - 08:31:26 -648
The Dalles 08:23:57 -62.1 Dark Up 64.7 182.8 Up 08:16:21 - 08:31:33 -654
Maupin 08:23:57 -62.5 Dark Up 65.2 183.1 Up 08:16:21 - 08:31:33 -697
Sisters 08:23:59 -63.4 Dark Up 66.1 182.0 Up 08:16:23 - 08:31:35 -777
Bend 08:23:58 -63.6 Dark Up 66.3 182.7 Up 08:16:22 - 08:31:34 -805
Oregon Observatory 08:23:59 -63.8 Dark Up 66.5 182.4 Up 08:16:23 - 08:31:35 -820
Chiloquin 08:24:01 -65.1 Dark Up 67.8 181.5 Up 08:16:25 - 08:31:37 -945
Klamath Falls 08:24:01 -65.4 Dark Up 68.1 181.7 Up 08:16:25 - 08:31:37 -981
Cedarville 08:23:57 -65.7 Dark Up 68.7 185.9 Up 08:16:21 - 08:31:33 -1078
Fall River/Burney 08:24:01 -66.5 Dark Up 69.3 182.8 Up 08:16:25 - 08:31:37 -1108
Greenville 08:24:00 -67.2 Dark Up 70.2 184.2 Up 08:16:24 - 08:31:36 -1208
Gimple 08:24:00 -67.2 Dark Up 70.2 184.4 Up 08:16:24 - 08:31:36 -1209
Quincy 08:24:00 -67.4 Dark Up 70.4 184.2 Up 08:16:24 - 08:31:36 -1229
Portola 08:23:58 -67.3 Dark Up 70.5 185.6 Up 08:16:22 - 08:31:34 -1249
Reno 08:23:56 -67.4 Dark Up 70.7 187.5 Up 08:16:20 - 08:31:32 -1288
Carson City 08:23:57 -67.7 Dark Up 71.0 187.7 Up 08:16:21 - 08:31:33 -1325
Gardnerville 08:23:57 -67.9 Dark Up 71.3 187.9 Up 08:16:21 - 08:31:33 -1351
Yerington 08:23:55 -67.6 Dark Up 71.2 189.6 Up 08:16:19 - 08:31:31 -1356
Dunrhomin 08:23:09 -59.9 Dark Up 65.3 221.3 Up 08:15:33 - 08:30:45 -1395
Hawthorne 08:23:53 -67.9 Dark Up 71.5 191.3 Up 08:16:17 - 08:31:29 -1412
Nikitin 08:23:09 -60.0 Dark Up 65.5 221.5 Up 08:15:33 - 08:30:45 -1414
CU-SBO 08:23:10 -60.1 Dark Up 65.6 221.5 Up 08:15:34 - 08:30:46 -1421
Lee Vining 08:23:55 -68.5 Dark Up 72.2 190.2 Up 08:16:19 - 08:31:31 -1463
Bishop 08:23:53 -68.8 Dark Up 72.6 192.8 Up 08:16:17 - 08:31:29 -1538
Beatty 08:23:48 -68.5 Dark Up 72.7 198.2 Up 08:16:12 - 08:31:24 -1612
Patrick 08:23:39 -68.1 Dark Up 73.2 208.7 Up 08:16:03 - 08:31:15 -1812
Laughlin/Bullhead City 08:23:41 -68.7 Dark Up 73.7 207.0 Up 08:16:05 - 08:31:17 -1828
Wildwood 08:23:57 -71.6 Dark Up 75.9 194.9 Up 08:16:21 - 08:31:33 -1880
Lake Havasu City 08:23:41 -69.0 Dark Up 74.2 208.9 Up 08:16:05 - 08:31:17 -1904
Idyllwild 08:23:50 -70.9 Dark Up 75.7 202.2 Up 08:16:14 - 08:31:26 -1949
George/Scottsdale 08:23:33 -68.0 Dark Up 73.7 217.6 Up 08:15:57 - 08:31:09 -2021
Calipatria 08:23:47 -70.7 Dark Up 75.8 207.4 Up 08:16:11 - 08:31:23 -2033
Yuma 08:23:44 -70.5 Dark Up 75.9 211.2 Up 08:16:08 - 08:31:20 -2093

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 48639, (2024/11/15 08:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 10.70  25
44Zet Per      03:54:07.9 +31:53:01  2.8 11.52  19
PPM 092958     03:49:55.1 +22:14:38  5.9  2.09  14
PPM 092931     03:49:00.2 +21:20:32  8.5  1.49  14
PPM 093057     03:54:57.9 +20:52:54  9.4  0.58  15
PPM 093039     03:53:57.0 +20:35:29 10.3  0.23  15
48639          03:53:49.1 +20:21:58 15.6        15
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:09:58 UT

Marc W. Buie, Southwest Research Institute

RECON