RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-653-028265 with event index number of 166776

Geocentric closest approach at 2018/11/24 09:59:11 UTC

J2000 position of star is 05:05:08.0 +40:30:28
Equinox of date position of star is 05:06:21.7 +40:31:50
Stellar brightness R=15.1, use SENSEUP=128
Star is 21 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 21.9 AU from the Sun and 21.0 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is 975 km.
The sky-plane scale is 15208.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.7 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2018/11/24 09:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.4 +16:32:45  0.8 24.82   8
3Iot Aur       04:58:13.6 +33:11:39  2.7  7.52  14
8Zet Aur       05:03:48.2 +41:06:06  3.8  0.76  22
PPM 047668     05:05:13.2 +40:42:30  7.9  0.29  21
PPM 047704     05:06:48.1 +40:16:53  9.9  0.26  21
PPM 047693     05:06:18.0 +40:36:49 10.9  0.09  21
8405           05:06:27.1 +40:31:56 15.1        21
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 24.8 km RECON observability=1.0 and success probability=11.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:58:22 -51.1 Dark Up 75.2 241.7 Up 09:47:22 - 10:09:23 -1625
Tonasket 09:58:22 -51.2 Dark Up 75.3 242.5 Up 09:47:22 - 10:09:23 -1650
Okanogan 09:58:22 -51.5 Dark Up 75.6 243.4 Up 09:47:22 - 10:09:23 -1688
Brewster 09:58:23 -51.7 Dark Up 75.8 243.9 Up 09:47:22 - 10:09:23 -1720
Manson/Chelan 09:58:23 -52.0 Dark Up 76.1 244.0 Up 09:47:23 - 10:09:24 -1748
Entiat 09:58:23 -52.2 Dark Up 76.3 244.6 Up 09:47:23 - 10:09:24 -1773
Wenatchee 09:58:23 -52.4 Dark Up 76.4 245.4 Up 09:47:23 - 10:09:24 -1802
Ellensburg 09:58:23 -52.8 Dark Up 76.7 246.6 Up 09:47:23 - 10:09:24 -1850
Yakima 09:58:23 -53.0 Dark Up 76.9 248.1 Up 09:47:23 - 10:09:24 -1894
Pasco 09:58:19 -52.4 Dark Up 76.1 251.9 Up 09:47:18 - 10:09:19 -1908
Toppenish/White Swan 09:58:23 -53.0 Dark Up 76.9 249.3 Up 09:47:22 - 10:09:23 -1915
PNWRO 09:58:17 -52.3 Dark Up 76.0 253.2 Up 09:47:17 - 10:09:18 -1931
George/Umatilla 09:58:19 -52.7 Dark Up 76.3 252.8 Up 09:47:18 - 10:09:19 -1948
Goldendale 09:58:23 -53.6 Dark Up 77.3 250.8 Up 09:47:23 - 10:09:24 -1982
The Dalles 09:58:24 -53.9 Dark Up 77.6 251.2 Up 09:47:23 - 10:09:24 -2011
Maupin 09:58:23 -54.1 Dark Up 77.7 253.2 Up 09:47:23 - 10:09:24 -2055
Madras/Culver 09:58:23 -54.4 Dark Up 77.9 255.5 Up 09:47:23 - 10:09:24 -2115
Redmond 09:58:23 -54.6 Dark Up 78.0 257.1 Up 09:47:22 - 10:09:23 -2155
Sisters 09:58:24 -54.8 Dark Up 78.3 256.4 Up 09:47:23 - 10:09:24 -2158
Bend 09:58:23 -54.8 Dark Up 78.1 257.9 Up 09:47:23 - 10:09:24 -2180
Oregon Observatory 09:58:23 -55.0 Dark Up 78.3 258.5 Up 09:47:23 - 10:09:24 -2201
La Pine/Gilchrist 09:58:23 -55.1 Dark Up 78.4 259.4 Up 09:47:23 - 10:09:24 -2224
Niwot 09:57:29 -45.2 Dark Up 66.3 281.2 Up 09:46:29 - 10:08:30 -2233
North Lake 09:58:21 -55.0 Dark Up 78.0 262.2 Up 09:47:20 - 10:09:21 -2262
Paisley 09:58:20 -55.0 Dark Up 77.8 265.1 Up 09:47:19 - 10:09:20 -2316
Chiloquin 09:58:23 -55.9 Dark Up 78.8 264.4 Up 09:47:23 - 10:09:24 -2351
Lakeview 09:58:18 -55.1 Dark Up 77.7 267.6 Up 09:47:18 - 10:09:19 -2368
Klamath Falls 09:58:23 -56.0 Dark Up 78.7 266.2 Up 09:47:23 - 10:09:24 -2387
Tulelake 09:58:22 -56.0 Dark Up 78.5 267.8 Up 09:47:21 - 10:09:22 -2412
Cedarville 09:58:17 -55.3 Dark Up 77.6 270.7 Up 09:47:16 - 10:09:17 -2437
Fall River/Burney 09:58:20 -56.4 Dark Up 78.5 272.3 Up 09:47:20 - 10:09:21 -2509
Susanville 09:58:17 -56.2 Dark Up 77.9 275.6 Up 09:47:17 - 10:09:18 -2566
Gimple 09:58:18 -56.4 Dark Up 78.0 276.9 Up 09:47:18 - 10:09:19 -2600
Greenville 09:58:18 -56.5 Dark Up 78.1 276.8 Up 09:47:18 - 10:09:19 -2601
Quincy 09:58:18 -56.6 Dark Up 78.0 277.8 Up 09:47:18 - 10:09:19 -2623
Portola 09:58:16 -56.3 Dark Up 77.7 278.4 Up 09:47:16 - 10:09:17 -2628
Reno 09:58:14 -56.0 Dark Up 77.1 279.7 Up 09:47:14 - 10:09:15 -2646
Carson City 09:58:14 -56.1 Dark Up 77.1 281.2 Up 09:47:13 - 10:09:14 -2684
Yerington 09:58:12 -55.7 Dark Up 76.5 282.0 Up 09:47:12 - 10:09:13 -2694
Gardnerville 09:58:14 -56.1 Dark Up 77.0 282.3 Up 09:47:13 - 10:09:14 -2710
Hawthorne 09:58:10 -55.5 Dark Up 76.0 283.8 Up 09:47:09 - 10:09:10 -2734
Tonopah 09:58:05 -54.6 Dark Up 74.9 285.4 Up 09:47:04 - 10:09:05 -2757
Lee Vining 09:58:11 -56.1 Dark Up 76.3 286.1 Up 09:47:10 - 10:09:11 -2805
Bishop 09:58:08 -55.8 Dark Up 75.5 288.2 Up 09:47:08 - 10:09:09 -2856
Beatty 09:58:02 -54.7 Dark Up 74.2 289.2 Up 09:47:01 - 10:09:02 -2872
Indian Springs 09:57:58 -54.0 Dark Up 73.3 290.0 Up 09:46:57 - 10:08:58 -2884
Henderson 09:57:55 -53.6 Dark Up 72.6 291.4 Up 09:46:55 - 10:08:56 -2925
Lone Pine 09:58:06 -55.8 Dark Up 75.0 290.8 Up 09:47:06 - 10:09:07 -2931
Patrick 09:57:51 -52.9 Dark Up 71.5 292.8 Up 09:46:50 - 10:08:51 -2966
DCO 09:57:48 -52.4 Dark Up 70.9 293.3 Up 09:46:47 - 10:08:48 -2981
Searchlight/Boulder City 09:57:54 -53.7 Dark Up 72.3 293.0 Up 09:46:54 - 10:08:55 -2985
Kingman/Dolan Springs 09:57:51 -53.1 Dark Up 71.6 293.4 Up 09:46:50 - 10:08:51 -2994
Laughlin/Bullhead City 09:57:53 -53.5 Dark Up 71.9 293.7 Up 09:46:52 - 10:08:53 -3009
Mohave Valley 09:57:53 -53.5 Dark Up 71.8 294.5 Up 09:46:52 - 10:08:53 -3038
Lake Havasu City 09:57:51 -53.4 Dark Up 71.5 295.5 Up 09:46:50 - 10:08:51 -3075
Parker 09:57:51 -53.5 Dark Up 71.3 296.4 Up 09:46:50 - 10:08:51 -3112
CPSLO 09:58:14 -58.1 Dark Up 76.4 297.3 Up 09:47:13 - 10:09:14 -3122
Blythe 09:57:51 -53.8 Dark Up 71.3 297.9 Up 09:46:51 - 10:08:52 -3175
Idyllwild 09:57:59 -55.5 Dark Up 72.9 299.0 Up 09:46:58 - 10:08:59 -3212
Wildwood 09:58:06 -56.9 Dark Up 74.4 299.5 Up 09:47:05 - 10:09:06 -3213
Calipatria 09:57:54 -54.7 Dark Up 71.7 299.8 Up 09:46:54 - 10:08:55 -3250
Yuma 09:57:51 -54.0 Dark Up 70.9 300.3 Up 09:46:50 - 10:08:51 -3275

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, (2018/11/24 09:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 24.82   8
3Iot Aur       04:56:59.6 +33:09:58  2.7  7.52  14
8Zet Aur       05:02:28.7 +41:04:33  3.8  0.76  22
PPM 047668     05:03:54.0 +40:40:59  7.9  0.29  21
PPM 047704     05:05:29.2 +40:15:24  9.9  0.26  21
PPM 047693     05:04:58.9 +40:35:20 10.9  0.09  21
8405           05:05:08.0 +40:30:28 15.1        21
Positions are for J2000

Event circumstances last updated at 2017/08/03 16:26:30 UT

Marc W. Buie, Southwest Research Institute

RECON