RECON: TNO occultation with 84922

Event between (84922) 03VS2 and star UC4-617-020908 with event index number of 172059

Geocentric closest approach at 2018/12/26 09:59:34 UTC

J2000 position of star is 05:16:18.4 +33:18:06
Equinox of date position of star is 05:17:29.0 +33:19:13
Stellar brightness R=16.4, use SENSEUP=128
Star is 65 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=19.8

[RECON map]
TNO is 36.7 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 124 seconds.
The 1-sigma cross-track error in the shadow position is 1572 km.
The sky-plane scale is 25908.3 km/arcsec.

The TNO has an absolute magnitude Hv=4.2
Diameter=871.0 km assuming a 5% albedo -- 35.5 sec chord
Diameter=355.6 km assuming a 30% albedo -- 14.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 84922, (2018/12/26 10:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.7 +16:32:46  0.8 19.10  76
3Iot Aur       04:58:14.0 +33:11:40  2.7  4.04  68
17 Aur         05:19:34.1 +33:47:10  6.1  0.63  64
PPM 070144     05:18:50.7 +33:36:46  8.1  0.40  64
PPM 070119     05:17:44.9 +33:10:56  9.4  0.14  64
84922          05:17:33.1 +33:19:17 16.4        64
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 22.5 km RECON observability=1.0 and success probability=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:57:18 -55.3 Dark Up 52.9 262.4 Up 09:46:29 - 10:08:07 7580
Tonasket 09:57:17 -55.5 Dark Up 52.9 262.7 Up 09:46:28 - 10:08:06 7556
Okanogan 09:57:17 -55.7 Dark Up 53.1 263.0 Up 09:46:28 - 10:08:06 7519
Brewster 09:57:18 -56.0 Dark Up 53.2 263.2 Up 09:46:29 - 10:08:07 7487
Manson/Chelan 09:57:18 -56.3 Dark Up 53.5 263.2 Up 09:46:29 - 10:08:07 7458
Entiat 09:57:17 -56.5 Dark Up 53.6 263.4 Up 09:46:28 - 10:08:06 7434
Wenatchee 09:57:18 -56.7 Dark Up 53.7 263.7 Up 09:46:29 - 10:08:07 7406
Ellensburg 09:57:17 -57.1 Dark Up 53.9 264.1 Up 09:46:28 - 10:08:06 7359
Yakima 09:57:17 -57.3 Dark Up 53.9 264.6 Up 09:46:28 - 10:08:06 7317
Pasco 09:57:12 -56.7 Dark Up 53.0 266.2 Up 09:46:23 - 10:08:01 7311
Toppenish/White Swan 09:57:15 -57.4 Dark Up 53.8 265.0 Up 09:46:26 - 10:08:04 7298
PNWRO 09:57:11 -56.7 Dark Up 52.8 266.7 Up 09:46:22 - 10:08:00 7290
George/Umatilla 09:57:12 -57.0 Dark Up 53.2 266.5 Up 09:46:23 - 10:08:01 7272
Goldendale 09:57:16 -57.9 Dark Up 54.2 265.4 Up 09:46:27 - 10:08:05 7232
The Dalles 09:57:17 -58.2 Dark Up 54.4 265.5 Up 09:46:28 - 10:08:06 7201
Maupin 09:57:15 -58.4 Dark Up 54.4 266.1 Up 09:46:26 - 10:08:04 7159
Madras/Culver 09:57:15 -58.8 Dark Up 54.5 266.9 Up 09:46:26 - 10:08:04 7101
Redmond 09:57:14 -59.0 Dark Up 54.5 267.3 Up 09:46:25 - 10:08:03 7063
Sisters 09:57:15 -59.2 Dark Up 54.8 267.0 Up 09:46:26 - 10:08:04 7057
Niwot 09:56:30 -49.6 Dark Up 42.5 281.6 Up 09:45:41 - 10:07:19 7055
Bend 09:57:15 -59.2 Dark Up 54.6 267.5 Up 09:46:26 - 10:08:04 7037
Oregon Observatory 09:57:15 -59.4 Dark Up 54.7 267.7 Up 09:46:26 - 10:08:04 7016
La Pine/Gilchrist 09:57:14 -59.5 Dark Up 54.8 267.9 Up 09:46:25 - 10:08:03 6994
North Lake 09:57:12 -59.4 Dark Up 54.4 268.9 Up 09:46:23 - 10:08:01 6960
Paisley 09:57:11 -59.4 Dark Up 54.1 270.0 Up 09:46:22 - 10:08:00 6910
Chiloquin 09:57:14 -60.3 Dark Up 55.1 269.2 Up 09:46:25 - 10:08:03 6869
Lakeview 09:57:09 -59.6 Dark Up 54.0 270.8 Up 09:46:20 - 10:07:58 6860
Klamath Falls 09:57:13 -60.5 Dark Up 55.0 269.8 Up 09:46:24 - 10:08:02 6834
Tulelake 09:57:12 -60.4 Dark Up 54.8 270.4 Up 09:46:23 - 10:08:01 6812
Cedarville 09:57:07 -59.8 Dark Up 53.8 271.8 Up 09:46:18 - 10:07:56 6795
Fall River/Burney 09:57:11 -60.8 Dark Up 54.7 271.7 Up 09:46:22 - 10:08:00 6717
Susanville 09:57:07 -60.6 Dark Up 54.2 273.0 Up 09:46:18 - 10:07:56 6666
Gimple 09:57:07 -60.9 Dark Up 54.3 273.3 Up 09:46:18 - 10:07:56 6632
Greenville 09:57:07 -60.9 Dark Up 54.4 273.2 Up 09:46:18 - 10:07:56 6631
Quincy 09:57:08 -61.0 Dark Up 54.3 273.5 Up 09:46:19 - 10:07:57 6609
Portola 09:57:06 -60.7 Dark Up 54.0 274.0 Up 09:46:17 - 10:07:55 6606
Reno 09:57:04 -60.4 Dark Up 53.5 274.7 Up 09:46:15 - 10:07:53 6593
Carson City 09:57:04 -60.5 Dark Up 53.4 275.2 Up 09:46:15 - 10:07:53 6555
Yerington 09:57:02 -60.2 Dark Up 52.9 275.8 Up 09:46:13 - 10:07:51 6549
Gardnerville 09:57:03 -60.6 Dark Up 53.4 275.5 Up 09:46:14 - 10:07:52 6530
Hawthorne 09:57:00 -60.0 Dark Up 52.5 276.6 Up 09:46:11 - 10:07:49 6512
Tonopah 09:56:55 -59.1 Dark Up 51.3 277.9 Up 09:46:06 - 10:07:44 6497
Lee Vining 09:57:00 -60.5 Dark Up 52.8 277.1 Up 09:46:11 - 10:07:49 6441
Bishop 09:56:57 -60.2 Dark Up 52.1 278.2 Up 09:46:08 - 10:07:46 6395
Beatty 09:56:53 -59.1 Dark Up 50.8 279.5 Up 09:46:04 - 10:07:42 6386
Indian Springs 09:56:49 -58.4 Dark Up 49.9 280.4 Up 09:46:00 - 10:07:38 6380
Henderson 09:56:47 -58.0 Dark Up 49.2 281.3 Up 09:45:58 - 10:07:36 6343
Lone Pine 09:56:56 -60.2 Dark Up 51.8 279.4 Up 09:46:07 - 10:07:45 6322
Patrick 09:56:43 -57.3 Dark Up 48.2 282.4 Up 09:45:54 - 10:07:32 6308
DCO 09:56:41 -56.8 Dark Up 47.6 283.0 Up 09:45:52 - 10:07:30 6296
Searchlight/Boulder City 09:56:46 -58.1 Dark Up 49.1 282.0 Up 09:45:57 - 10:07:35 6284
Kingman/Dolan Springs 09:56:43 -57.5 Dark Up 48.3 282.6 Up 09:45:54 - 10:07:32 6279
Laughlin/Bullhead City 09:56:45 -57.9 Dark Up 48.7 282.4 Up 09:45:56 - 10:07:34 6262
Mohave Valley 09:56:44 -57.9 Dark Up 48.7 282.7 Up 09:45:55 - 10:07:33 6234
Lake Havasu City 09:56:43 -57.8 Dark Up 48.4 283.3 Up 09:45:54 - 10:07:32 6199
Parker 09:56:42 -57.9 Dark Up 48.3 283.7 Up 09:45:53 - 10:07:31 6163
CPSLO 09:57:01 -62.6 Dark Up 53.6 280.0 Up 09:46:12 - 10:07:50 6121
Blythe 09:56:42 -58.2 Dark Up 48.4 284.1 Up 09:45:53 - 10:07:31 6099
Idyllwild 09:56:49 -59.9 Dark Up 50.1 283.3 Up 09:46:00 - 10:07:38 6052
Wildwood 09:56:54 -61.3 Dark Up 51.7 282.3 Up 09:46:05 - 10:07:43 6042
Calipatria 09:56:45 -59.0 Dark Up 49.0 284.4 Up 09:45:56 - 10:07:34 6020
Yuma 09:56:41 -58.4 Dark Up 48.2 285.1 Up 09:45:52 - 10:07:30 6000

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 84922, (2018/12/26 10:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 19.10  76
3Iot Aur       04:56:59.6 +33:09:58  2.7  4.04  68
17 Aur         05:18:19.0 +33:46:02  6.1  0.63  64
PPM 070144     05:17:35.7 +33:35:37  8.1  0.40  64
PPM 070119     05:16:30.2 +33:09:46  9.4  0.14  64
84922          05:16:18.4 +33:18:06 16.4        64
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:08:50 UT

Marc W. Buie, Southwest Research Institute

RECON