RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02328976 with event index number of 166776

Geocentric closest approach at 2018/11/24 09:59:45 UTC

J2000 position of star is 05:05:08.0 +40:30:28
Equinox of date position of star is 05:06:25.2 +40:31:54
Stellar brightness G=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 964 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 10:00UT)
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=23.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 09:58:57 -50.7 Dark Up 74.9 239.8 Up 09:47:55 - 10:09:59 -837
Oroville 09:58:56 -51.0 Dark Up 75.1 242.0 Up 09:47:54 - 10:09:58 -900
Tonasket 09:58:56 -51.1 Dark Up 75.2 242.8 Up 09:47:54 - 10:09:58 -925
Okanogan 09:58:56 -51.4 Dark Up 75.5 243.6 Up 09:47:54 - 10:09:58 -963
Brewster 09:58:56 -51.6 Dark Up 75.7 244.2 Up 09:47:54 - 10:09:58 -995
Manson/Chelan 09:58:57 -52.0 Dark Up 76.0 244.3 Up 09:47:55 - 10:09:59 -1023
Entiat 09:58:57 -52.1 Dark Up 76.2 244.9 Up 09:47:55 - 10:09:59 -1048
Wenatchee 09:58:57 -52.3 Dark Up 76.3 245.7 Up 09:47:55 - 10:09:59 -1077
Ellensburg 09:58:57 -52.7 Dark Up 76.6 246.8 Up 09:47:55 - 10:09:59 -1125
Yakima 09:58:57 -52.9 Dark Up 76.8 248.4 Up 09:47:55 - 10:09:59 -1169
Pasco 09:58:52 -52.3 Dark Up 76.0 252.1 Up 09:47:50 - 10:09:54 -1183
Toppenish/White Swan 09:58:56 -52.9 Dark Up 76.8 249.6 Up 09:47:54 - 10:09:58 -1190
PNWRO 09:58:52 -52.3 Dark Up 75.9 253.4 Up 09:47:50 - 10:09:54 -1206
George/Umatilla 09:58:53 -52.6 Dark Up 76.2 253.1 Up 09:47:51 - 10:09:55 -1222
Goldendale 09:58:57 -53.5 Dark Up 77.2 251.1 Up 09:47:55 - 10:09:59 -1256
The Dalles 09:58:58 -53.8 Dark Up 77.6 251.4 Up 09:47:56 - 10:10:00 -1286
Maupin 09:58:57 -54.0 Dark Up 77.6 253.4 Up 09:47:55 - 10:09:59 -1330
Madras/Culver 09:58:57 -54.3 Dark Up 77.8 255.7 Up 09:47:55 - 10:09:59 -1390
Redmond 09:58:56 -54.5 Dark Up 77.9 257.3 Up 09:47:54 - 10:09:58 -1430
Sisters 09:58:58 -54.8 Dark Up 78.2 256.6 Up 09:47:56 - 10:10:00 -1433
Bend 09:58:57 -54.7 Dark Up 78.0 258.1 Up 09:47:55 - 10:09:59 -1455
Oregon Observatory 09:58:57 -54.9 Dark Up 78.2 258.7 Up 09:47:55 - 10:09:59 -1476
La Pine/Gilchrist 09:58:57 -55.0 Dark Up 78.3 259.6 Up 09:47:55 - 10:09:59 -1499
Niwot 09:58:03 -45.1 Dark Up 66.2 281.2 Up 09:47:01 - 10:09:05 -1510
North Lake 09:58:55 -54.9 Dark Up 77.9 262.3 Up 09:47:53 - 10:09:57 -1537
Paisley 09:58:53 -54.9 Dark Up 77.7 265.3 Up 09:47:51 - 10:09:55 -1591
Chiloquin 09:58:57 -55.8 Dark Up 78.7 264.6 Up 09:47:55 - 10:09:59 -1626
Lakeview 09:58:52 -55.1 Dark Up 77.6 267.7 Up 09:47:50 - 10:09:54 -1643
Klamath Falls 09:58:57 -55.9 Dark Up 78.6 266.3 Up 09:47:55 - 10:09:59 -1662
Tulelake 09:58:56 -55.9 Dark Up 78.4 267.9 Up 09:47:54 - 10:09:58 -1686
Cedarville 09:58:51 -55.2 Dark Up 77.5 270.8 Up 09:47:49 - 10:09:53 -1712
Fall River/Burney 09:58:54 -56.3 Dark Up 78.4 272.4 Up 09:47:52 - 10:09:56 -1784
Susanville 09:58:52 -56.1 Dark Up 77.8 275.7 Up 09:47:50 - 10:09:54 -1841
Gimple 09:58:52 -56.3 Dark Up 77.9 276.9 Up 09:47:50 - 10:09:54 -1875
Greenville 09:58:52 -56.4 Dark Up 78.0 276.9 Up 09:47:50 - 10:09:54 -1876
Quincy 09:58:52 -56.5 Dark Up 77.9 277.8 Up 09:47:50 - 10:09:54 -1898
Portola 09:58:50 -56.2 Dark Up 77.6 278.5 Up 09:47:48 - 10:09:52 -1904
Reno 09:58:48 -55.9 Dark Up 77.0 279.7 Up 09:47:46 - 10:09:50 -1921
Carson City 09:58:48 -56.0 Dark Up 77.0 281.2 Up 09:47:46 - 10:09:50 -1960
Yerington 09:58:45 -55.6 Dark Up 76.4 282.0 Up 09:47:43 - 10:09:47 -1969
Gardnerville 09:58:47 -56.1 Dark Up 76.9 282.2 Up 09:47:45 - 10:09:49 -1985
Hawthorne 09:58:43 -55.4 Dark Up 75.9 283.8 Up 09:47:41 - 10:09:45 -2010
Tonopah 09:58:38 -54.5 Dark Up 74.8 285.3 Up 09:47:36 - 10:09:40 -2032
Lee Vining 09:58:44 -56.0 Dark Up 76.2 286.1 Up 09:47:42 - 10:09:46 -2080
Bishop 09:58:41 -55.6 Dark Up 75.4 288.1 Up 09:47:39 - 10:09:43 -2131
Beatty 09:58:35 -54.6 Dark Up 74.1 289.2 Up 09:47:33 - 10:09:37 -2148
Indian Springs 09:58:31 -53.8 Dark Up 73.2 289.9 Up 09:47:29 - 10:09:33 -2160
Henderson 09:58:29 -53.5 Dark Up 72.5 291.3 Up 09:47:27 - 10:09:31 -2201
Lone Pine 09:58:39 -55.6 Dark Up 74.9 290.7 Up 09:47:37 - 10:09:41 -2207
Patrick 09:58:24 -52.7 Dark Up 71.4 292.7 Up 09:47:22 - 10:09:26 -2242
DCO 09:58:22 -52.2 Dark Up 70.8 293.3 Up 09:47:20 - 10:09:24 -2257
Searchlight/Boulder City 09:58:28 -53.6 Dark Up 72.2 293.0 Up 09:47:26 - 10:09:30 -2261
Kingman/Dolan Springs 09:58:24 -52.9 Dark Up 71.5 293.4 Up 09:47:22 - 10:09:26 -2270
Laughlin/Bullhead City 09:58:26 -53.4 Dark Up 71.8 293.7 Up 09:47:24 - 10:09:28 -2285
Mohave Valley 09:58:26 -53.4 Dark Up 71.7 294.4 Up 09:47:24 - 10:09:28 -2314
Lake Havasu City 09:58:25 -53.3 Dark Up 71.4 295.4 Up 09:47:23 - 10:09:27 -2351
Parker 09:58:24 -53.3 Dark Up 71.2 296.3 Up 09:47:22 - 10:09:26 -2388
CPSLO 09:58:47 -58.0 Dark Up 76.3 297.1 Up 09:47:45 - 10:09:49 -2397
Blythe 09:58:25 -53.7 Dark Up 71.2 297.8 Up 09:47:23 - 10:09:27 -2451
Idyllwild 09:58:32 -55.4 Dark Up 72.8 298.9 Up 09:47:30 - 10:09:34 -2488
Wildwood 09:58:39 -56.8 Dark Up 74.3 299.4 Up 09:47:37 - 10:09:41 -2489
Calipatria 09:58:27 -54.5 Dark Up 71.6 299.7 Up 09:47:25 - 10:09:29 -2526
Yuma 09:58:24 -53.9 Dark Up 70.8 300.2 Up 09:47:22 - 10:09:26 -2551

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 10:00UT)
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 2018/06/05 16:35:20 UT

Marc W. Buie, Southwest Research Institute

RECON