RECON: TNO occultation with 499522

Event between (499522) 10PL66 and star GA1200:00396030 with event index number of 2653899

Geocentric closest approach at 2028/10/05 11:38:42 UTC

J2000 position of star is 02:25:30.8 +30:01:34
Equinox of date position of star is 02:26:49.1 +30:07:31
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 15 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=19.8

[RECON map]
TNO is 15.2 AU from the Sun and 14.4 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 6.5 arcsec/hr.
The 1-sigma error in the time of the event is 201 seconds.
The 1-sigma cross-track error in the shadow position is 3155 km.
The sky-plane scale is 10442.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=156.3 km assuming a 5% albedo -- 8.4 sec chord
Diameter=63.8 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 499522, (2028/10/05 11:39UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:34.5 +16:33:54  0.8 32.70  39
Hamal          02:08:48.0 +23:35:50  2.0  7.73   7
12 Tri         02:29:51.7 +29:47:46  5.3  0.68  15
PPM 091662     02:27:12.8 +30:00:31  8.3  0.15  15
PPM 067319     02:27:26.5 +30:11:04 10.4  0.06  15
499522         02:27:12.6 +30:09:17 14.1        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 4.5 sigma about the mid-time.
The median site spacing is 28.5 km RECON observability=1.0 and success probability=12.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:36:16 -15.5 AT Up 49.6 255.4 Up 11:21:16 - 11:51:16 5001
Kamloops 11:36:52 -24.4 Dark Up 58.4 241.5 Up 11:21:52 - 11:51:52 4538
Kelowna 11:36:48 -24.2 Dark Up 58.3 243.8 Up 11:21:48 - 11:51:48 4478
Peachland 11:36:48 -24.5 Dark Up 58.5 243.6 Up 11:21:48 - 11:51:48 4461
Summerland 11:36:48 -24.5 Dark Up 58.5 243.9 Up 11:21:48 - 11:51:48 4448
Penticton 11:36:47 -24.4 Dark Up 58.5 244.1 Up 11:21:47 - 11:51:47 4444
Oliver 11:36:46 -24.6 Dark Up 58.6 244.7 Up 11:21:46 - 11:51:46 4410
Anarchist Mountain Observatory 11:36:45 -24.5 Dark Up 58.6 245.1 Up 11:21:45 - 11:51:45 4397
Tonasket 11:36:45 -24.7 Dark Up 58.8 245.5 Up 11:21:45 - 11:51:45 4365
Okanogan 11:36:44 -24.9 Dark Up 59.0 245.8 Up 11:21:44 - 11:51:44 4329
Brewster 11:36:44 -25.1 Dark Up 59.2 246.0 Up 11:21:44 - 11:51:44 4298
Manson/Chelan 11:36:45 -25.4 Dark Up 59.5 245.9 Up 11:21:45 - 11:51:45 4270
Victoria 11:36:57 -27.1 Dark Up 61.2 240.8 Up 11:21:57 - 11:51:57 4267
Wenatchee 11:36:45 -25.7 Dark Up 59.8 246.4 Up 11:21:45 - 11:51:45 4219
Ellensburg 11:36:44 -26.0 Dark Up 60.1 246.8 Up 11:21:44 - 11:51:44 4173
Yakima 11:36:43 -26.2 Dark Up 60.3 247.4 Up 11:21:43 - 11:51:43 4132
Toppenish/White Swan 11:36:42 -26.2 Dark Up 60.3 248.0 Up 11:21:42 - 11:51:42 4115
PNWRO 11:36:36 -25.3 Dark Up 59.4 250.3 Up 11:21:36 - 11:51:36 4111
Goldendale 11:36:43 -26.6 Dark Up 60.8 248.4 Up 11:21:43 - 11:51:43 4050
The Dalles 11:36:43 -27.0 Dark Up 61.1 248.3 Up 11:21:43 - 11:51:43 4019
Maupin 11:36:42 -27.0 Dark Up 61.2 249.2 Up 11:21:42 - 11:51:42 3980
Dunrhomin 11:35:37 -17.2 AT Up 50.7 270.1 Up 11:20:37 - 11:50:37 3921
CU-SBO 11:35:36 -17.3 AT Up 50.8 270.3 Up 11:20:36 - 11:50:36 3894
Sisters 11:36:42 -27.7 Dark Up 61.8 250.1 Up 11:21:42 - 11:51:42 3880
Bend 11:36:40 -27.6 Dark Up 61.7 250.8 Up 11:21:40 - 11:51:40 3861
Oregon Observatory 11:36:40 -27.8 Dark Up 61.8 251.0 Up 11:21:40 - 11:51:40 3841
North Lake 11:36:37 -27.6 Dark Up 61.7 252.7 Up 11:21:37 - 11:51:37 3788
Chiloquin 11:36:39 -28.5 Dark Up 62.5 252.9 Up 11:21:39 - 11:51:39 3697
Lakeview 11:36:33 -27.6 Dark Up 61.6 255.2 Up 11:21:33 - 11:51:33 3692
Klamath Falls 11:36:38 -28.6 Dark Up 62.6 253.6 Up 11:21:38 - 11:51:38 3664
Cedarville 11:36:31 -27.7 Dark Up 61.6 256.5 Up 11:21:31 - 11:51:31 3629
Fall River/Burney 11:36:34 -28.8 Dark Up 62.6 256.2 Up 11:21:34 - 11:51:34 3551
Susanville 11:36:30 -28.5 Dark Up 62.2 258.1 Up 11:21:30 - 11:51:30 3503
Gimple 11:36:30 -28.7 Dark Up 62.5 258.4 Up 11:21:30 - 11:51:30 3470
Greenville 11:36:31 -28.8 Dark Up 62.5 258.3 Up 11:21:31 - 11:51:31 3468
Quincy 11:36:30 -28.8 Dark Up 62.6 258.7 Up 11:21:30 - 11:51:30 3447
Portola 11:36:28 -28.5 Dark Up 62.2 259.4 Up 11:21:28 - 11:51:28 3445
Reno 11:36:25 -28.2 Dark Up 61.8 260.4 Up 11:21:25 - 11:51:25 3433
Carson City 11:36:24 -28.2 Dark Up 61.8 261.1 Up 11:21:24 - 11:51:24 3397
Yerington 11:36:21 -27.8 Dark Up 61.4 262.0 Up 11:21:21 - 11:51:21 3392
Gardnerville 11:36:23 -28.3 Dark Up 61.8 261.6 Up 11:21:23 - 11:51:23 3373
Hawthorne 11:36:19 -27.6 Dark Up 61.0 263.2 Up 11:21:19 - 11:51:19 3358
Tonopah 11:36:12 -26.7 Dark Up 60.0 265.1 Up 11:21:12 - 11:51:12 3346
Lee Vining 11:36:19 -28.1 Dark Up 61.5 263.9 Up 11:21:19 - 11:51:19 3287
Bishop 11:36:15 -27.8 Dark Up 61.0 265.5 Up 11:21:15 - 11:51:15 3243
Beatty 11:36:08 -26.6 Dark Up 59.7 267.4 Up 11:21:08 - 11:51:08 3239
Indian Springs 11:36:03 -25.9 Dark Up 58.9 268.7 Up 11:21:03 - 11:51:03 3235
Henderson 11:35:59 -25.5 Dark Up 58.3 269.9 Up 11:20:59 - 11:50:59 3199
Patrick 11:35:54 -24.8 Dark Up 57.5 271.6 Up 11:20:54 - 11:50:54 3167
Kingman/Dolan Springs 11:35:54 -25.0 Dark Up 57.6 271.8 Up 11:20:54 - 11:50:54 3139
Laughlin/Bullhead City 11:35:56 -25.4 Dark Up 58.0 271.6 Up 11:20:56 - 11:50:56 3121
Mohave Valley 11:35:55 -25.4 Dark Up 58.0 272.0 Up 11:20:55 - 11:50:55 3093
Lake Havasu City 11:35:53 -25.3 Dark Up 57.8 272.8 Up 11:20:53 - 11:50:53 3059
George/Scottsdale 11:35:43 -23.5 Dark Up 55.7 275.1 Up 11:20:43 - 11:50:43 3054
Parker 11:35:53 -25.4 Dark Up 57.7 273.3 Up 11:20:53 - 11:50:53 3023
Idyllwild 11:36:01 -27.4 Dark Up 59.7 272.9 Up 11:21:01 - 11:51:01 2911
Wildwood 11:36:10 -28.8 Dark Up 61.3 271.3 Up 11:21:10 - 11:51:10 2897
Calipatria 11:35:56 -26.6 Dark Up 58.7 274.4 Up 11:20:56 - 11:50:56 2882
Yuma 11:35:51 -25.9 Dark Up 57.9 275.5 Up 11:20:51 - 11:50:51 2863

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 499522, (2028/10/05 11:39UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 32.70  39
Hamal          02:07:10.7 +23:27:41  2.0  7.73   7
12 Tri         02:28:10.0 +29:40:08  5.3  0.68  15
PPM 091662     02:25:31.1 +29:52:48  8.3  0.15  15
PPM 067319     02:25:44.7 +30:03:21 10.4  0.06  15
499522         02:25:30.8 +30:01:34 14.1        15
Positions are for J2000

Event circumstances last updated at 2022/02/19 01:16:37 UT

Marc W. Buie, Southwest Research Institute

RECON