RECON: TNO occultation with 523741

Event between (523741) 14TY85 and star GA1220:01292593 with event index number of 2324080

Geocentric closest approach at 2027/08/13 08:16:08 UTC

J2000 position of star is 04:54:48.4 +32:58:26
Equinox of date position of star is 04:56:22.1 +33:00:39
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 158 degrees from the moon. Moon is 87% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 33.1 AU from the Sun and 33.5 AU from the Earth.
Apparent velocity is 19.2 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 103 seconds.
The 1-sigma cross-track error in the shadow position is 1679 km.
The sky-plane scale is 24292.3 km/arcsec.

The object has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 14.7 sec chord
Diameter=112.4 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523741, (2027/08/13 08:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.5 +16:33:46  0.8 17.01 151
3Iot Aur       04:58:47.8 +33:12:26  2.7  0.50 158
PPM 069666     04:51:06.6 +32:38:02  6.0  1.22 157
PPM 069754     04:57:18.2 +32:49:34  8.2  0.24 158
523741         04:56:36.4 +33:00:59 15.5       158
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 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 08:14:54 -26.8 Dark Up 11.6 52.6 Really Low 08:05:48 - 08:24:00 1799
Kamloops 08:14:58 -24.6 Dark Up 14.5 55.1 Really Low 08:05:52 - 08:24:04 1744
Peachland 08:14:53 -25.5 Dark Up 14.2 55.3 Really Low 08:05:47 - 08:23:59 1725
Summerland 08:14:52 -25.7 Dark Up 14.2 55.3 Really Low 08:05:46 - 08:23:58 1722
Ellensburg 08:14:41 -28.3 Dark Up 12.2 54.2 Really Low 08:05:35 - 08:23:47 1721
Manson/Chelan 08:14:45 -27.4 Dark Up 12.9 54.7 Really Low 08:05:39 - 08:23:51 1721
The Dalles 08:14:35 -29.7 Dark Up 11.0 53.6 Really Low 08:05:29 - 08:23:41 1720
Wenatchee 08:14:43 -27.9 Dark Up 12.6 54.5 Really Low 08:05:37 - 08:23:49 1720
Penticton 08:14:51 -25.7 Dark Up 14.2 55.4 Really Low 08:05:45 - 08:23:57 1719
Kelowna 08:14:53 -25.4 Dark Up 14.5 55.5 Really Low 08:05:47 - 08:23:59 1719
Yakima 08:14:39 -28.7 Dark Up 12.0 54.1 Really Low 08:05:33 - 08:23:45 1717
Oliver 08:14:50 -26.1 Dark Up 14.0 55.3 Really Low 08:05:44 - 08:23:56 1717
Brewster 08:14:45 -27.2 Dark Up 13.3 54.9 Really Low 08:05:39 - 08:23:51 1714
Maupin 08:14:34 -30.1 Dark Up 10.8 53.6 Really Low 08:05:28 - 08:23:40 1712
Sisters 08:14:31 -31.0 Dark Up 10.0 53.1 Really Low 08:05:25 - 08:23:37 1712
Anarchist Mountain Observatory 08:14:48 -26.2 Dark Up 14.0 55.4 Really Low 08:05:42 - 08:23:54 1712
Okanogan 08:14:46 -26.9 Dark Up 13.5 55.1 Really Low 08:05:40 - 08:23:52 1711
Toppenish/White Swan 08:14:38 -28.9 Dark Up 11.9 54.2 Really Low 08:05:32 - 08:23:44 1710
Oregon Observatory 08:14:29 -31.4 Dark Up 9.8 53.1 Really Low 08:05:23 - 08:23:35 1703
Bend 08:14:28 -31.2 Dark Up 10.0 53.2 Really Low 08:05:22 - 08:23:34 1703
Chiloquin 08:14:24 -32.7 Dark Up 8.8 52.7 Really Low 08:05:18 - 08:23:30 1691
Klamath Falls 08:14:22 -33.1 Dark Up 8.6 52.7 Really Low 08:05:16 - 08:23:28 1683
PNWRO 08:14:33 -29.2 Dark Up 12.5 55.1 Really Low 08:05:27 - 08:23:39 1668
Fall River/Burney 08:14:16 -34.3 Dark Up 8.1 52.8 Really Low 08:05:10 - 08:23:22 1649
Cedarville 08:14:15 -33.7 Dark Up 9.1 53.6 Really Low 08:05:09 - 08:23:21 1628
Greenville 08:14:10 -35.2 Dark Up 7.8 52.9 Really Low 08:05:04 - 08:23:16 1618
Gimple 08:14:11 -35.2 Dark Up 7.9 53.0 Really Low 08:05:05 - 08:23:17 1616
Quincy 08:14:10 -35.4 Dark Up 7.7 52.9 Really Low 08:05:04 - 08:23:16 1613
Portola 08:14:08 -35.5 Dark Up 7.9 53.2 Really Low 08:05:02 - 08:23:14 1598
Reno 08:14:06 -35.7 Dark Up 8.2 53.5 Really Low 08:05:00 - 08:23:12 1573
Carson City 08:14:05 -36.1 Dark Up 7.9 53.5 Really Low 08:04:59 - 08:23:11 1564
Gardnerville 08:14:03 -36.3 Dark Up 7.8 53.5 Really Low 08:04:57 - 08:23:09 1557
Yerington 08:14:02 -36.2 Dark Up 8.2 53.8 Really Low 08:04:56 - 08:23:08 1541
Hawthorne 08:13:59 -36.7 Dark Up 8.3 54.0 Really Low 08:04:53 - 08:23:05 1514
Lee Vining 08:13:57 -37.3 Dark Up 7.6 53.7 Really Low 08:04:51 - 08:23:03 1514
Bishop 08:13:53 -37.8 Dark Up 7.7 54.0 Really Low 08:04:47 - 08:22:59 1475
Beatty 08:13:47 -38.2 Dark Up 8.5 54.8 Really Low 08:04:41 - 08:22:53 1411
Wildwood 08:13:38 -41.1 Dark Up 5.6 53.6 Really Low 08:04:32 - 08:22:44 1378
Sleaford 08:14:44 -21.7 Dark Down 22.9 65.3 Low 08:05:38 - 08:23:50 1364
Idyllwild 08:13:33 -41.3 Dark Up 6.7 54.5 Really Low 08:04:27 - 08:22:39 1306
Laughlin/Bullhead City 08:13:35 -39.6 Dark Up 8.9 55.7 Really Low 08:04:29 - 08:22:41 1284
Patrick 08:13:35 -39.3 Dark Up 9.6 56.1 Really Low 08:04:29 - 08:22:41 1268
Lake Havasu City 08:13:31 -40.3 Dark Up 8.7 55.8 Really Low 08:04:25 - 08:22:37 1252
Calipatria 08:13:28 -41.8 Dark Up 7.1 55.0 Really Low 08:04:22 - 08:22:34 1244
Yuma 08:13:24 -42.1 Dark Up 7.5 55.4 Really Low 08:04:18 - 08:22:30 1197
George/Scottsdale 08:13:23 -40.6 Dark Up 10.0 56.8 Really Low 08:04:17 - 08:22:29 1136
Dunrhomin 08:13:42 -32.8 Dark Up 18.0 61.6 Really Low 08:04:36 - 08:22:48 1103
CU-SBO 08:13:41 -33.1 Dark Up 17.8 61.5 Really Low 08:04:35 - 08:22:47 1099
Nikitin 08:13:42 -33.0 Dark Up 17.8 61.6 Really Low 08:04:36 - 08:22:48 1098

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 523741, (2027/08/13 08:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 17.01 151
3Iot Aur       04:56:59.6 +33:09:58  2.7  0.50 158
PPM 069666     04:49:19.1 +32:35:16  6.0  1.22 157
PPM 069754     04:55:30.4 +32:47:02  8.2  0.24 158
523741         04:54:48.4 +32:58:26 15.5       158
Positions are for J2000

Event circumstances last updated at 2023/12/23 04:33:34 UT

Marc W. Buie, Southwest Research Institute

RECON