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 09:59:12 UTC

J2000 position of star is 05:05:08.0 +40:30:28
Equinox of date position of star is 05:06:23.1 +40:31:52
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 135 seconds.
The 1-sigma cross-track error in the shadow position is 1003 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 +40:16:52  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 24.9 km RECON observability=1.0 and success probability=11.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:58:23 -51.1 Dark Up 75.2 241.7 Up 09:46:39 - 10:10:07 -1629
Tonasket 09:58:23 -51.2 Dark Up 75.3 242.5 Up 09:46:39 - 10:10:07 -1654
Okanogan 09:58:23 -51.5 Dark Up 75.6 243.4 Up 09:46:39 - 10:10:07 -1693
Brewster 09:58:23 -51.7 Dark Up 75.8 243.9 Up 09:46:39 - 10:10:07 -1725
Manson/Chelan 09:58:24 -52.0 Dark Up 76.1 244.0 Up 09:46:40 - 10:10:08 -1753
Entiat 09:58:24 -52.2 Dark Up 76.3 244.7 Up 09:46:40 - 10:10:08 -1778
Wenatchee 09:58:24 -52.4 Dark Up 76.4 245.4 Up 09:46:40 - 10:10:08 -1807
Ellensburg 09:58:25 -52.8 Dark Up 76.7 246.6 Up 09:46:41 - 10:10:09 -1855
Yakima 09:58:24 -53.0 Dark Up 76.9 248.2 Up 09:46:40 - 10:10:08 -1899
Pasco 09:58:20 -52.4 Dark Up 76.1 251.9 Up 09:46:36 - 10:10:04 -1913
Toppenish/White Swan 09:58:23 -53.0 Dark Up 76.9 249.3 Up 09:46:39 - 10:10:07 -1920
PNWRO 09:58:19 -52.3 Dark Up 76.0 253.2 Up 09:46:35 - 10:10:03 -1936
George/Umatilla 09:58:20 -52.7 Dark Up 76.3 252.9 Up 09:46:36 - 10:10:04 -1952
Goldendale 09:58:24 -53.6 Dark Up 77.3 250.8 Up 09:46:40 - 10:10:08 -1986
The Dalles 09:58:25 -53.9 Dark Up 77.6 251.2 Up 09:46:41 - 10:10:09 -2016
Maupin 09:58:24 -54.1 Dark Up 77.7 253.2 Up 09:46:40 - 10:10:08 -2060
Madras/Culver 09:58:24 -54.4 Dark Up 77.9 255.5 Up 09:46:40 - 10:10:08 -2120
Redmond 09:58:24 -54.6 Dark Up 78.0 257.1 Up 09:46:40 - 10:10:08 -2159
Sisters 09:58:25 -54.8 Dark Up 78.3 256.4 Up 09:46:41 - 10:10:09 -2163
Bend 09:58:24 -54.8 Dark Up 78.1 257.9 Up 09:46:40 - 10:10:08 -2185
Oregon Observatory 09:58:24 -55.0 Dark Up 78.3 258.5 Up 09:46:40 - 10:10:08 -2206
La Pine/Gilchrist 09:58:24 -55.1 Dark Up 78.4 259.4 Up 09:46:40 - 10:10:08 -2229
Niwot 09:57:31 -45.2 Dark Up 66.3 281.2 Up 09:45:47 - 10:09:15 -2242
North Lake 09:58:22 -55.0 Dark Up 78.0 262.2 Up 09:46:38 - 10:10:06 -2267
Paisley 09:58:20 -55.0 Dark Up 77.8 265.1 Up 09:46:36 - 10:10:04 -2321
Chiloquin 09:58:24 -55.9 Dark Up 78.8 264.4 Up 09:46:40 - 10:10:08 -2355
Lakeview 09:58:20 -55.1 Dark Up 77.7 267.6 Up 09:46:36 - 10:10:04 -2373
Klamath Falls 09:58:24 -56.0 Dark Up 78.7 266.2 Up 09:46:40 - 10:10:08 -2392
Tulelake 09:58:23 -56.0 Dark Up 78.5 267.8 Up 09:46:39 - 10:10:07 -2416
Cedarville 09:58:18 -55.3 Dark Up 77.6 270.7 Up 09:46:34 - 10:10:02 -2442
Fall River/Burney 09:58:22 -56.4 Dark Up 78.5 272.3 Up 09:46:38 - 10:10:06 -2514
Susanville 09:58:19 -56.2 Dark Up 77.9 275.6 Up 09:46:35 - 10:10:03 -2571
Gimple 09:58:20 -56.4 Dark Up 78.0 276.9 Up 09:46:36 - 10:10:04 -2605
Greenville 09:58:20 -56.5 Dark Up 78.1 276.8 Up 09:46:36 - 10:10:04 -2606
Quincy 09:58:20 -56.6 Dark Up 78.0 277.8 Up 09:46:36 - 10:10:04 -2628
Portola 09:58:18 -56.3 Dark Up 77.7 278.4 Up 09:46:34 - 10:10:02 -2633
Reno 09:58:15 -56.0 Dark Up 77.1 279.7 Up 09:46:31 - 10:09:59 -2651
Carson City 09:58:15 -56.1 Dark Up 77.1 281.2 Up 09:46:31 - 10:09:59 -2690
Yerington 09:58:12 -55.7 Dark Up 76.5 282.0 Up 09:46:28 - 10:09:56 -2700
Gardnerville 09:58:15 -56.1 Dark Up 77.0 282.3 Up 09:46:31 - 10:09:59 -2716
Hawthorne 09:58:11 -55.5 Dark Up 76.0 283.8 Up 09:46:27 - 10:09:55 -2740
Tonopah 09:58:05 -54.6 Dark Up 74.9 285.4 Up 09:46:21 - 10:09:49 -2763
Lee Vining 09:58:12 -56.1 Dark Up 76.3 286.1 Up 09:46:28 - 10:09:56 -2811
Bishop 09:58:09 -55.7 Dark Up 75.5 288.2 Up 09:46:25 - 10:09:53 -2861
Beatty 09:58:03 -54.7 Dark Up 74.2 289.2 Up 09:46:19 - 10:09:47 -2878
Indian Springs 09:57:59 -54.0 Dark Up 73.3 290.0 Up 09:46:15 - 10:09:43 -2890
Henderson 09:57:56 -53.6 Dark Up 72.6 291.4 Up 09:46:12 - 10:09:40 -2932
Lone Pine 09:58:07 -55.8 Dark Up 75.0 290.8 Up 09:46:23 - 10:09:51 -2937
Patrick 09:57:52 -52.8 Dark Up 71.5 292.8 Up 09:46:08 - 10:09:36 -2973
DCO 09:57:49 -52.4 Dark Up 70.9 293.3 Up 09:46:05 - 10:09:33 -2988
Searchlight/Boulder City 09:57:55 -53.7 Dark Up 72.3 293.0 Up 09:46:11 - 10:09:39 -2992
Kingman/Dolan Springs 09:57:52 -53.0 Dark Up 71.6 293.4 Up 09:46:08 - 10:09:36 -3001
Laughlin/Bullhead City 09:57:54 -53.5 Dark Up 71.9 293.7 Up 09:46:10 - 10:09:38 -3016
Mohave Valley 09:57:54 -53.5 Dark Up 71.8 294.5 Up 09:46:10 - 10:09:38 -3045
Lake Havasu City 09:57:52 -53.4 Dark Up 71.5 295.5 Up 09:46:08 - 10:09:36 -3082
Parker 09:57:52 -53.5 Dark Up 71.3 296.4 Up 09:46:08 - 10:09:36 -3119
CPSLO 09:58:15 -58.1 Dark Up 76.4 297.3 Up 09:46:31 - 10:09:59 -3127
Blythe 09:57:52 -53.8 Dark Up 71.3 297.9 Up 09:46:08 - 10:09:36 -3182
Idyllwild 09:58:00 -55.5 Dark Up 72.9 299.0 Up 09:46:16 - 10:09:44 -3218
Wildwood 09:58:06 -56.9 Dark Up 74.4 299.5 Up 09:46:22 - 10:09:50 -3219
Calipatria 09:57:55 -54.7 Dark Up 71.7 299.8 Up 09:46:11 - 10:09:39 -3257
Yuma 09:57:51 -54.0 Dark Up 70.9 300.3 Up 09:46:07 - 10:09:35 -3282

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 2017/12/05 19:03:40 UT

Marc W. Buie, Southwest Research Institute

RECON