RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03467736 with event index number of 1670605

Geocentric closest approach at 2027/02/14 03:12:20 UTC

J2000 position of star is 06:20:48.3 +41:24:39
Equinox of date position of star is 06:22:13.0 +41:24:01
Stellar brightness G=12.4, use SENSEUP=16
Star is 42 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 26.4 AU from the Sun and 25.8 AU from the Earth.
The TNO is moving 17.1 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 265 seconds.
The 1-sigma cross-track error in the shadow position is 2405 km.
The sky-plane scale is 18739.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 5.3 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2027/02/14 03:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.6 +27:57:31  1.1 21.82  60
34Bet Aur      06:01:31.2 +44:56:50  1.9  5.25  40
38 Aur         06:05:15.3 +42:54:29  6.1  3.57  40
PPM 049024     06:26:35.0 +41:05:20  8.5  0.79  43
PPM 048960     06:21:29.6 +41:04:42  8.7  0.39  42
PPM 048972     06:22:23.0 +41:17:20 11.4  0.13  42
8405           06:22:43.5 +41:23:47 12.4        43
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 24.3 km RECON observability=1.0 and success probability=15.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 03:13:30 -17.3 AT Up 70.2 101.1 Up 02:58:30 - 03:28:30 3865
Clarence Fulton 03:13:22 -19.9 Dark Up 72.3 111.3 Up 02:58:22 - 03:28:22 3828
Kelowna 03:13:24 -19.9 Dark Up 72.3 109.9 Up 02:58:24 - 03:28:24 3802
Summerland 03:13:27 -19.7 Dark Up 72.3 108.9 Up 02:58:27 - 03:28:27 3787
Penticton 03:13:26 -19.8 Dark Up 72.4 108.9 Up 02:58:26 - 03:28:26 3777
Oliver 03:13:27 -19.8 Dark Up 72.5 107.8 Up 02:58:27 - 03:28:27 3746
Anarchist Mountain Observatory 03:13:28 -20.0 Dark Up 72.7 107.6 Up 02:58:28 - 03:28:28 3723
Tonasket 03:13:29 -20.0 Dark Up 72.7 106.5 Up 02:58:29 - 03:28:29 3700
Okanogan 03:13:30 -19.9 Dark Up 72.7 105.3 Up 02:58:30 - 03:28:30 3677
Brewster 03:13:30 -19.7 Dark Up 72.6 104.2 Up 02:58:30 - 03:28:30 3663
Manson/Chelan 03:13:30 -19.5 Dark Up 72.4 103.1 Up 02:58:30 - 03:28:30 3661
Entiat 03:13:30 -19.5 Dark Up 72.4 102.3 Up 02:58:30 - 03:28:30 3646
Wenatchee 03:13:30 -19.4 Dark Up 72.4 101.4 Up 02:58:30 - 03:28:30 3629
Ellensburg 03:13:30 -19.3 Dark Up 72.4 99.9 Up 02:58:30 - 03:28:30 3605
Yakima 03:13:30 -19.3 Dark Up 72.4 98.6 Up 02:58:30 - 03:28:30 3572
Toppenish/White Swan 03:13:30 -19.4 Dark Up 72.6 98.1 Up 02:58:30 - 03:28:30 3546
Goldendale 03:13:45 -19.1 Dark Up 72.4 96.0 Up 02:58:45 - 03:28:45 3512
The Dalles 03:13:47 -18.9 Dark Up 72.2 95.0 Up 02:58:47 - 03:28:47 3509
Pasco 03:13:30 -20.3 Dark Up 73.5 99.1 Up 02:58:30 - 03:28:30 3476
Maupin 03:13:48 -19.0 Dark Up 72.3 93.8 Up 02:58:48 - 03:28:48 3468
PNWRO 03:13:30 -20.4 Dark Up 73.6 98.5 Up 02:58:30 - 03:28:30 3444
Sisters 03:13:54 -18.6 Dark Up 72.0 90.7 Up 02:58:54 - 03:28:54 3415
Redmond 03:13:53 -18.9 Dark Up 72.2 90.9 Up 02:58:53 - 03:28:53 3394
Bend 03:13:54 -18.8 Dark Up 72.2 90.1 Up 02:58:54 - 03:28:54 3382
Oregon Observatory 03:13:55 -18.7 Dark Up 72.1 89.5 Up 02:58:55 - 03:28:55 3373
La Pine/Gilchrist 03:13:56 -18.7 Dark Up 72.0 88.8 Up 02:58:56 - 03:28:56 3358
North Lake 03:13:56 -19.1 Dark Up 72.4 87.8 Up 02:58:56 - 03:28:56 3291
Klamath Falls 03:14:03 -18.5 Dark Up 71.8 84.3 Up 02:59:03 - 03:29:03 3245
Paisley 03:13:56 -19.4 Dark Up 72.7 86.3 Up 02:58:56 - 03:28:56 3226
Lakeview 03:13:58 -19.5 Dark Up 72.8 84.8 Up 02:58:58 - 03:28:58 3172
Fall River/Burney 03:14:06 -18.8 Dark Up 71.9 80.8 Up 02:59:06 - 03:29:06 3122
Cedarville 03:14:00 -19.7 Dark Up 72.9 82.7 Up 02:59:00 - 03:29:00 3105
Susanville 03:14:06 -19.3 Dark Up 72.3 79.1 Up 02:59:06 - 03:29:06 3030
Greenville 03:14:08 -19.1 Dark Up 72.1 78.2 Up 02:59:08 - 03:29:08 3020
Gimple 03:14:07 -19.1 Dark Up 72.1 78.2 Up 02:59:07 - 03:29:07 3016
Quincy 03:14:09 -19.1 Dark Up 72.0 77.6 Up 02:59:09 - 03:29:09 3002
Portola 03:14:08 -19.4 Dark Up 72.4 77.3 Up 02:59:08 - 03:29:08 2967
Reno 03:14:06 -19.9 Dark Up 72.8 76.5 Up 02:59:06 - 03:29:06 2911
Carson City 03:14:08 -20.0 Dark Up 72.7 75.4 Up 02:59:08 - 03:29:08 2877
Gardnerville 03:14:08 -20.0 Dark Up 72.7 74.6 Up 02:59:08 - 03:29:08 2853
Yerington 03:14:06 -20.4 Dark Up 73.1 74.7 Up 02:59:06 - 03:29:06 2828
Hawthorne 03:14:05 -20.8 Dark Up 73.4 73.2 Up 02:59:05 - 03:29:05 2760
Lee Vining 03:14:09 -20.5 Dark Up 72.9 71.5 Up 02:59:09 - 03:29:09 2733
Tonopah 03:14:02 -21.9 Dark Up 74.3 71.4 Up 02:59:02 - 03:29:02 2647
Bishop 03:14:09 -21.0 Dark Up 73.2 69.5 Up 02:59:09 - 03:29:09 2642
CPSLO 03:14:26 -19.2 Dark Up 70.8 64.5 Up 02:59:26 - 03:29:26 2574
Beatty 03:14:04 -22.3 Dark Up 74.2 67.4 Up 02:59:04 - 03:29:04 2518
Indian Springs 03:14:01 -23.2 Dark Up 74.9 65.7 Up 02:59:01 - 03:29:01 2435
Wildwood 03:14:21 -20.8 Dark Up 71.7 60.2 Up 02:59:21 - 03:29:21 2355
Henderson 03:13:59 -23.7 Dark Up 75.2 63.4 Up 02:58:59 - 03:28:59 2351
Niwot 03:13:05 -30.9 Dark Up 83.7 75.5 Up 02:58:05 - 03:28:05 2308
SwRI 03:13:05 -30.9 Dark Up 83.6 74.7 Up 02:58:05 - 03:28:05 2302
Searchlight/Boulder City 03:14:01 -23.8 Dark Up 75.0 61.4 Up 02:59:01 - 03:29:01 2294
Laughlin/Bullhead City 03:14:00 -24.1 Dark Up 75.1 60.1 Up 02:59:00 - 03:29:00 2250
Patrick 03:13:57 -24.7 Dark Up 75.7 60.3 Up 02:58:57 - 03:28:57 2238
Kingman/Dolan Springs 03:13:58 -24.5 Dark Up 75.4 59.7 Up 02:58:58 - 03:28:58 2226
Idyllwild 03:14:15 -22.4 Dark Up 72.8 57.8 Up 02:59:15 - 03:29:15 2224
Mohave Valley 03:14:01 -24.1 Dark Up 74.9 59.3 Up 02:59:01 - 03:29:01 2224
DCO 03:13:55 -25.2 Dark Up 76.0 58.5 Up 02:58:55 - 03:28:55 2175
Lake Havasu City 03:14:02 -24.3 Dark Up 74.9 57.7 Up 02:59:02 - 03:29:02 2174
Parker 03:14:03 -24.3 Dark Up 74.7 56.6 Up 02:59:03 - 03:29:03 2140
Calipatria 03:14:11 -23.3 Dark Up 73.3 55.0 Up 02:59:11 - 03:29:11 2107
Blythe 03:14:06 -24.1 Dark Up 74.2 55.4 Up 02:59:06 - 03:29:06 2105
Yuma 03:14:09 -24.1 Dark Up 73.7 52.8 Up 02:59:09 - 03:29:09 2021
George/Scottsdale 03:13:54 -26.3 Dark Up 76.1 52.1 Up 02:58:54 - 03:28:54 1981

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 8405, (2027/02/14 03:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 21.82  60
34Bet Aur      05:59:31.6 +44:56:51  1.9  5.25  40
38 Aur         06:03:18.2 +42:54:39  6.1  3.57  40
PPM 049024     06:24:40.2 +41:06:21  8.5  0.79  43
PPM 048960     06:19:34.7 +41:05:31  8.7  0.39  42
PPM 048972     06:20:27.9 +41:18:10 11.4  0.13  42
8405           06:20:48.3 +41:24:39 12.4        42
Positions are for J2000

Event circumstances last updated at 2019/12/01 23:28:39 UT

Marc W. Buie, Southwest Research Institute

RECON