RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02978775 with event index number of 1146980

Geocentric closest approach at 2021/12/15 05:59:52 UTC

J2000 position of star is 05:38:09.8 +41:26:27
Equinox of date position of star is 05:39:32.5 +41:27:03
Stellar brightness G=12.4, use SENSEUP=16
Star is 48 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 23.9 AU from the Sun and 22.9 AU from the Earth.
The TNO is moving 26.1 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 141 seconds.
The 1-sigma cross-track error in the shadow position is 894 km.
The sky-plane scale is 16626.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2021/12/15 06:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.0 +16:33:06  0.8 28.30  29
34Bet Aur      06:01:08.4 +44:56:50  1.9  5.24  53
PPM 048217     05:35:02.5 +42:07:21  6.2  1.10  48
PPM 048329     05:40:41.9 +41:22:08  7.1  0.20  49
PPM 048328     05:40:37.8 +41:31:39 10.0  0.19  49
8405           05:39:43.1 +41:27:07 12.4        49
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 24.0 km RECON observability=1.0 and success probability=30.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:01:10 -55.6 Dark Up 67.9 101.1 Up 05:48:57 - 06:13:24 -566
Summerland 06:01:11 -55.7 Dark Up 67.8 100.1 Up 05:48:58 - 06:13:25 -589
Penticton 06:01:11 -55.8 Dark Up 67.9 100.1 Up 05:48:58 - 06:13:25 -598
Okanagan Falls 06:01:12 -55.9 Dark Up 67.9 99.6 Up 05:48:58 - 06:13:25 -617
Oliver 06:01:12 -56.0 Dark Up 67.9 99.2 Up 05:48:58 - 06:13:25 -634
Anarchist Mountain Observatory 06:01:12 -56.2 Dark Up 68.1 99.0 Up 05:48:58 - 06:13:25 -657
Oroville 06:01:12 -56.2 Dark Up 68.0 98.7 Up 05:48:58 - 06:13:25 -663
Tonasket 06:01:12 -56.4 Dark Up 68.1 98.2 Up 05:48:59 - 06:13:26 -687
Okanogan 06:01:13 -56.5 Dark Up 68.0 97.2 Up 05:49:00 - 06:13:27 -717
Brewster 06:01:14 -56.6 Dark Up 67.9 96.4 Up 05:49:01 - 06:13:28 -740
Manson/Chelan 06:01:15 -56.5 Dark Up 67.7 95.5 Up 05:49:02 - 06:13:29 -752
Wenatchee 06:01:17 -56.7 Dark Up 67.6 94.2 Up 05:49:03 - 06:13:30 -796
Ellensburg 06:01:18 -56.8 Dark Up 67.5 93.0 Up 05:49:04 - 06:13:31 -832
Yakima 06:01:19 -57.1 Dark Up 67.5 92.0 Up 05:49:05 - 06:13:32 -874
Toppenish/White Swan 06:01:18 -57.3 Dark Up 67.6 91.7 Up 05:49:05 - 06:13:32 -900
Goldendale 06:01:20 -57.3 Dark Up 67.4 90.0 Up 05:49:07 - 06:13:34 -946
Pasco 06:01:15 -58.1 Dark Up 68.5 92.3 Up 05:49:02 - 06:13:29 -947
The Dalles 06:01:22 -57.3 Dark Up 67.1 89.2 Up 05:49:08 - 06:13:35 -958
George/Umatilla 06:01:16 -58.1 Dark Up 68.4 91.3 Up 05:49:03 - 06:13:30 -975
PNWRO 06:01:15 -58.3 Dark Up 68.7 91.9 Up 05:49:02 - 06:13:29 -978
Maupin 06:01:22 -57.5 Dark Up 67.2 88.3 Up 05:49:09 - 06:13:36 -1004
Madras/Culver 06:01:23 -57.8 Dark Up 67.1 87.0 Up 05:49:09 - 06:13:36 -1059
Sisters 06:01:25 -57.7 Dark Up 66.8 85.9 Up 05:49:11 - 06:13:38 -1081
Redmond 06:01:24 -58.0 Dark Up 67.1 86.1 Up 05:49:10 - 06:13:37 -1095
Bend 06:01:24 -58.0 Dark Up 66.9 85.5 Up 05:49:11 - 06:13:38 -1113
Oregon Observatory 06:01:25 -58.0 Dark Up 66.8 85.0 Up 05:49:11 - 06:13:38 -1127
La Pine/Gilchrist 06:01:26 -58.1 Dark Up 66.8 84.5 Up 05:49:12 - 06:13:39 -1146
North Lake 06:01:25 -58.7 Dark Up 67.2 83.8 Up 05:49:11 - 06:13:38 -1208
Chiloquin 06:01:28 -58.4 Dark Up 66.4 81.8 Up 05:49:15 - 06:13:42 -1250
Paisley 06:01:24 -59.2 Dark Up 67.4 82.7 Up 05:49:11 - 06:13:38 -1276
Klamath Falls 06:01:28 -58.6 Dark Up 66.4 81.1 Up 05:49:15 - 06:13:42 -1288
Tulelake 06:01:28 -58.9 Dark Up 66.6 80.6 Up 05:49:15 - 06:13:42 -1325
Lakeview 06:01:25 -59.5 Dark Up 67.4 81.6 Up 05:49:11 - 06:13:38 -1334
Cedarville 06:01:25 -60.0 Dark Up 67.5 80.1 Up 05:49:12 - 06:13:39 -1407
Fall River/Burney 06:01:29 -59.4 Dark Up 66.5 78.6 Up 05:49:16 - 06:13:43 -1421
Susanville 06:01:28 -60.2 Dark Up 66.9 77.3 Up 05:49:15 - 06:13:42 -1509
Greenville 06:01:29 -60.1 Dark Up 66.6 76.6 Up 05:49:16 - 06:13:43 -1528
Gimple 06:01:29 -60.2 Dark Up 66.7 76.7 Up 05:49:16 - 06:13:43 -1531
Quincy 06:01:30 -60.2 Dark Up 66.6 76.2 Up 05:49:16 - 06:13:43 -1549
Portola 06:01:29 -60.6 Dark Up 66.9 76.0 Up 05:49:15 - 06:13:42 -1577
Reno 06:01:27 -61.1 Dark Up 67.3 75.5 Up 05:49:14 - 06:13:41 -1624
Carson City 06:01:28 -61.3 Dark Up 67.2 74.7 Up 05:49:14 - 06:13:41 -1662
Gardnerville 06:01:28 -61.4 Dark Up 67.2 74.1 Up 05:49:14 - 06:13:41 -1689
Yerington 06:01:26 -61.8 Dark Up 67.7 74.3 Up 05:49:12 - 06:13:39 -1701
Hawthorne 06:01:25 -62.4 Dark Up 67.9 73.3 Up 05:49:12 - 06:13:39 -1765
Lee Vining 06:01:27 -62.3 Dark Up 67.4 71.9 Up 05:49:14 - 06:13:41 -1810
Tonopah 06:01:22 -63.6 Dark Up 68.8 72.2 Up 05:49:08 - 06:13:35 -1854
Bishop 06:01:26 -63.1 Dark Up 67.7 70.6 Up 05:49:13 - 06:13:40 -1894
SwRI 06:00:44 -69.6 Dark Up 78.2 78.0 Up 05:48:30 - 06:12:57 -1912
Lone Pine 06:01:26 -63.6 Dark Up 67.7 68.8 Up 05:49:12 - 06:13:39 -1983
Beatty 06:01:22 -64.4 Dark Up 68.8 69.3 Up 05:49:08 - 06:13:35 -1989
CPSLO 06:01:35 -62.1 Dark Up 65.3 66.3 Up 05:49:22 - 06:13:49 -2039
Indian Springs 06:01:19 -65.3 Dark Up 69.5 68.4 Up 05:49:05 - 06:13:32 -2053
Henderson 06:01:17 -66.1 Dark Up 69.8 66.9 Up 05:49:04 - 06:13:31 -2128
Searchlight/Boulder City 06:01:18 -66.4 Dark Up 69.6 65.4 Up 05:49:04 - 06:13:31 -2191
Patrick 06:01:15 -67.2 Dark Up 70.4 64.9 Up 05:49:01 - 06:13:28 -2224
Wildwood 06:01:31 -64.1 Dark Up 66.3 63.5 Up 05:49:17 - 06:13:44 -2230
Laughlin/Bullhead City 06:01:17 -66.7 Dark Up 69.7 64.6 Up 05:49:03 - 06:13:30 -2232
Kingman/Dolan Springs 06:01:15 -67.1 Dark Up 70.1 64.4 Up 05:49:02 - 06:13:29 -2243
Mohave Valley 06:01:17 -66.9 Dark Up 69.6 63.9 Up 05:49:04 - 06:13:31 -2261
Lake Havasu City 06:01:17 -67.2 Dark Up 69.6 62.9 Up 05:49:03 - 06:13:30 -2310
Idyllwild 06:01:25 -65.7 Dark Up 67.5 62.1 Up 05:49:12 - 06:13:39 -2324
Parker 06:01:17 -67.4 Dark Up 69.5 62.0 Up 05:49:04 - 06:13:31 -2348
Blythe 06:01:19 -67.3 Dark Up 69.0 60.9 Up 05:49:05 - 06:13:32 -2395
Calipatria 06:01:22 -66.8 Dark Up 68.1 60.3 Up 05:49:08 - 06:13:35 -2422
Yuma 06:01:20 -67.6 Dark Up 68.5 58.9 Up 05:49:06 - 06:13:33 -2492

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, (2021/12/15 06:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.30  29
34Bet Aur      05:59:31.6 +44:56:51  1.9  5.24  53
PPM 048217     05:33:28.7 +42:06:32  6.2  1.10  48
PPM 048329     05:39:08.6 +41:21:29  7.1  0.20  49
PPM 048328     05:39:04.4 +41:31:00 10.0  0.19  49
8405           05:38:09.8 +41:26:27 12.4        48
Positions are for J2000

Event circumstances last updated at 2019/06/16 22:11:13 UT

Marc W. Buie, Southwest Research Institute

RECON