RECON: TNO occultation with 612048

Event between (612048) 96TS66 and star GA1160:01568852 with event index number of 2804062

Geocentric closest approach at 2027/12/04 09:08:19 UTC

J2000 position of star is 05:41:36.7 +26:00:41
Equinox of date position of star is 05:43:02.3 +26:01:16
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 33% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 38.6 AU from the Sun and 37.6 AU from the Earth.
Apparent velocity is 24.3 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 268 seconds.
The 1-sigma cross-track error in the shadow position is 1520 km.
The sky-plane scale is 27276.1 km/arcsec.

The object has an absolute magnitude Hv=6.2
Diameter=350.0 km assuming a 5% albedo -- 14.4 sec chord
Diameter=142.9 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 612048, (2027/12/04 09:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.6 +16:33:48  0.8 17.99 108
Alnath         05:28:03.6 +28:37:43  1.6  4.28 120
125 Tau        05:41:28.1 +25:54:36  5.2  0.44 123
PPM 094677     05:43:21.3 +26:37:39  8.1  0.60 124
PPM 094688     05:43:37.0 +26:03:05  9.9  0.07 124
612048         05:43:20.7 +26:01:23 14.6       124
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 3.4 sigma about the mid-time.
The median site spacing is 38.8 km RECON observability=1.0 and success probability=15.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:07:24 -50.6 Dark Down 60.4 215.3 Up 08:52:24 - 09:22:24 -1936
Kamloops 09:08:04 -57.9 Dark Down 65.1 189.0 Up 08:53:04 - 09:23:04 -2120
Kelowna 09:08:01 -58.2 Dark Down 65.8 191.2 Up 08:53:01 - 09:23:01 -2203
Peachland 09:08:02 -58.4 Dark Down 66.0 190.7 Up 08:53:02 - 09:23:02 -2215
Summerland 09:08:02 -58.5 Dark Down 66.1 190.9 Up 08:53:02 - 09:23:02 -2230
Penticton 09:08:01 -58.5 Dark Down 66.2 191.2 Up 08:53:01 - 09:23:01 -2237
Oliver 09:08:01 -58.8 Dark Down 66.5 191.3 Up 08:53:01 - 09:23:01 -2273
Anarchist Mountain Observatory 09:08:01 -58.8 Dark Down 66.6 191.9 Up 08:53:01 - 09:23:01 -2290
Victoria 09:08:13 -60.7 Dark Down 67.5 182.8 Up 08:53:13 - 09:23:13 -2335
Okanogan 09:08:01 -59.4 Dark Down 67.3 191.7 Up 08:53:01 - 09:23:01 -2356
Brewster 09:08:02 -59.7 Dark Down 67.6 191.3 Up 08:53:02 - 09:23:02 -2384
Manson/Chelan 09:08:03 -60.0 Dark Down 67.9 190.6 Up 08:53:03 - 09:23:03 -2406
Wenatchee 09:08:03 -60.5 Dark Down 68.3 190.4 Up 08:53:03 - 09:23:03 -2455
Ellensburg 09:08:04 -60.9 Dark Down 68.8 190.0 Up 08:53:04 - 09:23:04 -2497
Yakima 09:08:04 -61.2 Dark Down 69.2 190.2 Up 08:53:04 - 09:23:04 -2540
Toppenish/White Swan 09:08:04 -61.3 Dark Down 69.4 190.7 Up 08:53:04 - 09:23:04 -2562
PNWRO 09:07:59 -60.9 Dark Down 69.5 194.7 Up 08:52:59 - 09:22:59 -2601
The Dalles 09:08:06 -62.3 Dark Down 70.2 189.1 Up 08:53:06 - 09:23:06 -2643
Maupin 09:08:06 -62.5 Dark Down 70.6 189.5 Up 08:53:06 - 09:23:06 -2687
Sisters 09:08:07 -63.4 Dark Down 71.6 188.6 Up 08:53:07 - 09:23:07 -2779
Bend 09:08:06 -63.5 Dark Down 71.8 189.4 Up 08:53:06 - 09:23:06 -2804
Oregon Observatory 09:08:07 -63.7 Dark Down 71.9 189.1 Up 08:53:07 - 09:23:07 -2822
Chiloquin 09:08:08 -64.9 Dark Down 73.3 188.6 Up 08:53:08 - 09:23:08 -2961
Klamath Falls 09:08:08 -65.1 Dark Down 73.6 189.0 Up 08:53:08 - 09:23:08 -2998
Cedarville 09:08:03 -64.8 Dark Down 74.1 194.5 Up 08:53:03 - 09:23:03 -3074
Fall River/Burney 09:08:07 -65.8 Dark Down 74.7 190.9 Up 08:53:07 - 09:23:07 -3125
Dunrhomin 09:07:12 -56.0 Dark Down 68.6 234.1 Up 08:52:12 - 09:22:12 -3153
Nikitin 09:07:12 -56.1 Dark Down 68.7 234.5 Up 08:52:12 - 09:22:12 -3172
CU-SBO 09:07:12 -56.2 Dark Down 68.8 234.5 Up 08:52:12 - 09:22:12 -3180
Greenville 09:08:05 -66.2 Dark Down 75.6 193.2 Up 08:53:05 - 09:23:05 -3223
Gimple 09:08:05 -66.1 Dark Down 75.5 193.5 Up 08:53:05 - 09:23:05 -3223
Quincy 09:08:05 -66.3 Dark Down 75.7 193.4 Up 08:53:05 - 09:23:05 -3245
Portola 09:08:04 -66.1 Dark Down 75.8 195.2 Up 08:53:04 - 09:23:04 -3259
Reno 09:08:01 -65.9 Dark Down 75.9 197.8 Up 08:53:01 - 09:23:01 -3288
Carson City 09:08:01 -66.1 Dark Down 76.2 198.3 Up 08:53:01 - 09:23:01 -3327
Yerington 09:07:59 -65.9 Dark Down 76.3 200.8 Up 08:52:59 - 09:22:59 -3348
Gardnerville 09:08:01 -66.3 Dark Down 76.5 198.8 Up 08:53:01 - 09:23:01 -3353
Hawthorne 09:07:57 -65.8 Dark Down 76.5 203.4 Up 08:52:57 - 09:22:57 -3399
Lee Vining 09:07:59 -66.5 Dark Down 77.2 202.6 Up 08:52:59 - 09:22:59 -3460
Bishop 09:07:56 -66.4 Dark Down 77.5 206.4 Up 08:52:56 - 09:22:56 -3525
Beatty 09:07:51 -65.5 Dark Down 77.3 213.4 Up 08:52:51 - 09:22:51 -3574
Patrick 09:07:40 -64.1 Dark Down 76.9 227.0 Up 08:52:40 - 09:22:40 -3730
Laughlin/Bullhead City 09:07:43 -64.8 Dark Down 77.5 225.6 Up 08:52:43 - 09:22:43 -3759
Lake Havasu City 09:07:41 -64.8 Dark Down 77.8 228.6 Up 08:52:41 - 09:22:41 -3832
Wildwood 09:07:57 -68.2 Dark Down 80.4 214.0 Up 08:52:57 - 09:22:57 -3883
George/Scottsdale 09:07:32 -63.2 Dark Down 76.7 238.1 Up 08:52:32 - 09:22:32 -3907
Idyllwild 09:07:50 -66.9 Dark Down 79.7 223.2 Up 08:52:50 - 09:22:50 -3921
Calipatria 09:07:45 -66.3 Dark Down 79.4 229.9 Up 08:52:45 - 09:22:45 -3986
Yuma 09:07:42 -65.7 Dark Down 79.1 234.6 Up 08:52:42 - 09:22:42 -4031

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 612048, (2027/12/04 09:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 17.99 108
Alnath         05:26:17.6 +28:36:23  1.6  4.28 120
125 Tau        05:39:44.2 +25:53:49  5.2  0.44 123
PPM 094677     05:41:36.7 +26:36:56  8.1  0.60 124
PPM 094688     05:41:52.9 +26:02:23  9.9  0.07 124
612048         05:41:36.7 +26:00:41 14.6       124
Positions are for J2000

Event circumstances last updated at 2022/12/26 04:04:32 UT

Marc W. Buie, Southwest Research Institute

RECON