RECON: TNO occultation with 449097

Event between (449097) 12UT68 and star GA1220:03383799 with event index number of 2289317

Geocentric closest approach at 2024/02/23 05:46:56 UTC

J2000 position of star is 09:05:25.4 +33:40:12
Equinox of date position of star is 09:06:54.2 +33:34:22
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 16 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 16.4 AU from the Sun and 15.5 AU from the Earth.
Apparent velocity is 20.1 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 637 km.
The sky-plane scale is 11252.6 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=76.9 km assuming a 5% albedo -- 3.8 sec chord
Diameter=31.4 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 449097, (2024/02/23 05:46UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.5 +27:57:57  1.1 18.06  27
PPM 074277     09:10:19.7 +33:46:58  6.4  0.74  16
PPM 074247     09:08:07.5 +33:16:21  8.6  0.39  16
PPM 074239     09:07:39.4 +33:31:57 10.2  0.16  16
449097         09:06:54.4 +33:34:21 16.4        16
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 38.0 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:47:21 -44.1 Dark Up 71.5 172.6 Up 05:42:45 - 05:51:57 -1296
Kamloops 05:48:10 -39.4 Dark Up 68.9 137.3 Up 05:43:34 - 05:52:46 -1485
Kelowna 05:48:07 -40.4 Dark Up 69.9 137.6 Up 05:43:31 - 05:52:43 -1573
Peachland 05:48:08 -40.3 Dark Up 69.9 136.8 Up 05:43:32 - 05:52:44 -1585
Summerland 05:48:08 -40.4 Dark Up 70.0 136.7 Up 05:43:32 - 05:52:44 -1601
Penticton 05:48:07 -40.5 Dark Up 70.1 136.8 Up 05:43:31 - 05:52:43 -1608
Oliver 05:48:08 -40.8 Dark Up 70.4 136.1 Up 05:43:32 - 05:52:44 -1646
Anarchist Mountain Observatory 05:48:07 -41.0 Dark Up 70.6 136.2 Up 05:43:31 - 05:52:43 -1665
Victoria 05:48:21 -39.2 Dark Up 68.9 127.4 Up 05:43:45 - 05:52:57 -1706
Okanogan 05:48:08 -41.3 Dark Up 70.9 134.4 Up 05:43:32 - 05:52:44 -1734
Brewster 05:48:09 -41.4 Dark Up 71.0 133.5 Up 05:43:33 - 05:52:45 -1763
Manson/Chelan 05:48:10 -41.3 Dark Up 71.0 132.3 Up 05:43:34 - 05:52:46 -1785
Wenatchee 05:48:11 -41.5 Dark Up 71.2 130.9 Up 05:43:35 - 05:52:47 -1836
Ellensburg 05:48:12 -41.6 Dark Up 71.4 129.5 Up 05:43:36 - 05:52:48 -1880
Yakima 05:48:12 -41.9 Dark Up 71.6 128.5 Up 05:43:36 - 05:52:48 -1924
Toppenish/White Swan 05:48:12 -42.1 Dark Up 71.8 128.4 Up 05:43:36 - 05:52:48 -1948
PNWRO 05:48:06 -43.1 Dark Up 72.9 130.6 Up 05:43:30 - 05:52:42 -1991
The Dalles 05:48:15 -42.1 Dark Up 71.9 124.9 Up 05:43:39 - 05:52:51 -2031
Maupin 05:48:15 -42.4 Dark Up 72.2 124.0 Up 05:43:39 - 05:52:51 -2076
Sisters 05:48:17 -42.7 Dark Up 72.4 120.8 Up 05:43:41 - 05:52:53 -2171
Bend 05:48:16 -43.0 Dark Up 72.6 120.6 Up 05:43:40 - 05:52:52 -2198
Oregon Observatory 05:48:17 -43.0 Dark Up 72.6 119.9 Up 05:43:41 - 05:52:53 -2216
Chiloquin 05:48:19 -43.5 Dark Up 73.0 115.4 Up 05:43:43 - 05:52:55 -2360
Klamath Falls 05:48:19 -43.7 Dark Up 73.2 114.5 Up 05:43:43 - 05:52:55 -2397
Cedarville 05:48:13 -45.1 Dark Up 74.6 115.1 Up 05:43:37 - 05:52:49 -2479
Fall River/Burney 05:48:18 -44.6 Dark Up 73.9 111.5 Up 05:43:42 - 05:52:54 -2529
Dunrhomin 05:47:12 -54.1 Dark Up 83.2 165.1 Up 05:42:36 - 05:51:48 -2564
Nikitin 05:47:12 -54.3 Dark Up 83.4 164.6 Up 05:42:36 - 05:51:48 -2585
CU-SBO 05:47:12 -54.3 Dark Up 83.4 163.9 Up 05:42:36 - 05:51:48 -2592
Greenville 05:48:16 -45.3 Dark Up 74.5 109.2 Up 05:43:40 - 05:52:52 -2630
Gimple 05:48:16 -45.4 Dark Up 74.6 109.3 Up 05:43:40 - 05:52:52 -2631
Quincy 05:48:16 -45.5 Dark Up 74.6 108.5 Up 05:43:40 - 05:52:52 -2652
Portola 05:48:15 -45.8 Dark Up 75.0 108.8 Up 05:43:39 - 05:52:51 -2668
Reno 05:48:12 -46.4 Dark Up 75.5 108.8 Up 05:43:36 - 05:52:48 -2699
Carson City 05:48:12 -46.6 Dark Up 75.7 107.5 Up 05:43:36 - 05:52:48 -2738
Yerington 05:48:09 -47.1 Dark Up 76.2 107.8 Up 05:43:33 - 05:52:45 -2761
Gardnerville 05:48:12 -46.8 Dark Up 75.8 106.7 Up 05:43:36 - 05:52:48 -2766
Hawthorne 05:48:07 -47.7 Dark Up 76.7 106.8 Up 05:43:31 - 05:52:43 -2813
Lee Vining 05:48:09 -47.7 Dark Up 76.5 103.7 Up 05:43:33 - 05:52:45 -2875
Bishop 05:48:06 -48.5 Dark Up 77.2 102.2 Up 05:43:30 - 05:52:42 -2942
Beatty 05:48:00 -49.8 Dark Up 78.5 102.4 Up 05:43:24 - 05:52:36 -2994
Patrick 05:47:47 -52.5 Dark Up 81.1 98.2 Up 05:43:11 - 05:52:23 -3155
Laughlin/Bullhead City 05:47:50 -52.2 Dark Up 80.5 95.9 Up 05:43:14 - 05:52:26 -3183
Lake Havasu City 05:47:49 -52.8 Dark Up 80.8 92.0 Up 05:43:13 - 05:52:25 -3258
Wildwood 05:48:08 -50.0 Dark Up 77.3 87.6 Up 05:43:32 - 05:52:44 -3305
George/Scottsdale 05:47:38 -54.9 Dark Up 82.8 88.0 Up 05:43:02 - 05:52:14 -3335
Idyllwild 05:47:59 -51.5 Dark Up 78.8 86.6 Up 05:43:23 - 05:52:35 -3345
Calipatria 05:47:54 -52.7 Dark Up 79.7 83.6 Up 05:43:18 - 05:52:30 -3412
Yuma 05:47:50 -53.5 Dark Up 80.4 81.0 Up 05:43:14 - 05:52:26 -3458

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 449097, (2024/02/23 05:46UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 18.06  27
PPM 074277     09:08:50.8 +33:52:54  6.4  0.74  16
PPM 074247     09:06:38.7 +33:22:14  8.6  0.39  16
PPM 074239     09:06:10.4 +33:37:50 10.2  0.16  16
449097         09:05:25.4 +33:40:12 16.4        16
Positions are for J2000

Event circumstances last updated at 2024/01/29 04:19:37 UT

Marc W. Buie, Southwest Research Institute

RECON