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 05:17:25.3 +33:19:09
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 101 seconds.
The 1-sigma cross-track error in the shadow position is 1467 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 22.3 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:57:17 -55.3 Dark Up 52.9 262.4 Up 09:48:20 - 10:06:14 7586
Tonasket 09:57:17 -55.5 Dark Up 52.9 262.7 Up 09:48:20 - 10:06:14 7562
Okanogan 09:57:16 -55.7 Dark Up 53.1 263.0 Up 09:48:19 - 10:06:13 7525
Brewster 09:57:17 -56.0 Dark Up 53.2 263.2 Up 09:48:20 - 10:06:14 7493
Manson/Chelan 09:57:17 -56.3 Dark Up 53.5 263.2 Up 09:48:20 - 10:06:14 7464
Entiat 09:57:17 -56.5 Dark Up 53.6 263.4 Up 09:48:20 - 10:06:14 7440
Wenatchee 09:57:16 -56.7 Dark Up 53.7 263.7 Up 09:48:19 - 10:06:13 7412
Ellensburg 09:57:16 -57.1 Dark Up 53.9 264.0 Up 09:48:19 - 10:06:13 7365
Yakima 09:57:15 -57.3 Dark Up 53.9 264.6 Up 09:48:18 - 10:06:12 7322
Pasco 09:57:11 -56.7 Dark Up 53.0 266.2 Up 09:48:14 - 10:06:08 7317
Toppenish/White Swan 09:57:15 -57.4 Dark Up 53.8 265.0 Up 09:48:18 - 10:06:12 7303
PNWRO 09:57:11 -56.7 Dark Up 52.8 266.7 Up 09:48:14 - 10:06:08 7296
George/Umatilla 09:57:12 -57.0 Dark Up 53.2 266.5 Up 09:48:15 - 10:06:09 7278
Goldendale 09:57:15 -57.9 Dark Up 54.2 265.4 Up 09:48:18 - 10:06:12 7237
The Dalles 09:57:15 -58.3 Dark Up 54.5 265.5 Up 09:48:18 - 10:06:12 7207
Maupin 09:57:15 -58.4 Dark Up 54.4 266.1 Up 09:48:18 - 10:06:12 7165
Madras/Culver 09:57:14 -58.8 Dark Up 54.5 266.9 Up 09:48:17 - 10:06:11 7107
Redmond 09:57:14 -59.0 Dark Up 54.5 267.3 Up 09:48:17 - 10:06:11 7069
Niwot 09:56:30 -49.6 Dark Up 42.5 281.6 Up 09:47:33 - 10:05:27 7065
Sisters 09:57:15 -59.2 Dark Up 54.8 267.0 Up 09:48:18 - 10:06:12 7063
Bend 09:57:14 -59.2 Dark Up 54.6 267.5 Up 09:48:17 - 10:06:11 7043
Oregon Observatory 09:57:13 -59.4 Dark Up 54.7 267.7 Up 09:48:16 - 10:06:10 7022
La Pine/Gilchrist 09:57:14 -59.5 Dark Up 54.8 267.9 Up 09:48:17 - 10:06:11 7000
North Lake 09:57:11 -59.4 Dark Up 54.4 268.9 Up 09:48:14 - 10:06:08 6966
Paisley 09:57:09 -59.4 Dark Up 54.1 270.0 Up 09:48:12 - 10:06:06 6916
Chiloquin 09:57:13 -60.3 Dark Up 55.1 269.2 Up 09:48:16 - 10:06:10 6875
Lakeview 09:57:08 -59.6 Dark Up 54.0 270.8 Up 09:48:11 - 10:06:05 6867
Klamath Falls 09:57:12 -60.5 Dark Up 55.0 269.8 Up 09:48:15 - 10:06:09 6841
Tulelake 09:57:11 -60.4 Dark Up 54.8 270.4 Up 09:48:14 - 10:06:08 6818
Cedarville 09:57:07 -59.8 Dark Up 53.8 271.8 Up 09:48:10 - 10:06:04 6801
Fall River/Burney 09:57:09 -60.8 Dark Up 54.7 271.7 Up 09:48:12 - 10:06:06 6724
Susanville 09:57:06 -60.6 Dark Up 54.2 273.0 Up 09:48:09 - 10:06:03 6673
Gimple 09:57:07 -60.9 Dark Up 54.3 273.3 Up 09:48:10 - 10:06:04 6639
Greenville 09:57:07 -60.9 Dark Up 54.4 273.2 Up 09:48:10 - 10:06:04 6637
Quincy 09:57:07 -61.0 Dark Up 54.4 273.5 Up 09:48:10 - 10:06:04 6616
Portola 09:57:05 -60.8 Dark Up 54.0 274.0 Up 09:48:08 - 10:06:02 6613
Reno 09:57:03 -60.4 Dark Up 53.5 274.7 Up 09:48:06 - 10:06:00 6599
Carson City 09:57:03 -60.5 Dark Up 53.4 275.2 Up 09:48:06 - 10:06:00 6562
Yerington 09:57:01 -60.2 Dark Up 52.9 275.8 Up 09:48:04 - 10:05:58 6556
Gardnerville 09:57:02 -60.6 Dark Up 53.4 275.5 Up 09:48:05 - 10:05:59 6537
Hawthorne 09:56:59 -60.0 Dark Up 52.5 276.6 Up 09:48:02 - 10:05:56 6519
Tonopah 09:56:54 -59.1 Dark Up 51.3 277.9 Up 09:47:57 - 10:05:51 6505
Lee Vining 09:56:59 -60.5 Dark Up 52.8 277.1 Up 09:48:02 - 10:05:56 6448
Bishop 09:56:56 -60.2 Dark Up 52.1 278.2 Up 09:47:59 - 10:05:53 6402
Beatty 09:56:53 -59.1 Dark Up 50.8 279.5 Up 09:47:56 - 10:05:50 6394
Indian Springs 09:56:49 -58.4 Dark Up 49.9 280.4 Up 09:47:52 - 10:05:46 6388
Henderson 09:56:46 -58.0 Dark Up 49.2 281.3 Up 09:47:49 - 10:05:43 6351
Lone Pine 09:56:54 -60.2 Dark Up 51.8 279.3 Up 09:47:57 - 10:05:51 6329
Patrick 09:56:42 -57.3 Dark Up 48.2 282.4 Up 09:47:45 - 10:05:39 6316
DCO 09:56:40 -56.8 Dark Up 47.6 283.0 Up 09:47:43 - 10:05:37 6305
Searchlight/Boulder City 09:56:46 -58.1 Dark Up 49.1 282.0 Up 09:47:49 - 10:05:43 6292
Kingman/Dolan Springs 09:56:42 -57.5 Dark Up 48.3 282.6 Up 09:47:45 - 10:05:39 6288
Laughlin/Bullhead City 09:56:44 -57.9 Dark Up 48.8 282.4 Up 09:47:47 - 10:05:41 6271
Mohave Valley 09:56:43 -57.9 Dark Up 48.7 282.7 Up 09:47:46 - 10:05:40 6242
Lake Havasu City 09:56:42 -57.8 Dark Up 48.4 283.3 Up 09:47:45 - 10:05:39 6207
Parker 09:56:42 -57.9 Dark Up 48.3 283.7 Up 09:47:45 - 10:05:39 6171
CPSLO 09:57:00 -62.6 Dark Up 53.6 280.0 Up 09:48:03 - 10:05:57 6128
Blythe 09:56:42 -58.2 Dark Up 48.4 284.1 Up 09:47:45 - 10:05:39 6107
Idyllwild 09:56:48 -59.9 Dark Up 50.1 283.3 Up 09:47:51 - 10:05:45 6060
Wildwood 09:56:54 -61.3 Dark Up 51.7 282.3 Up 09:47:57 - 10:05:51 6049
Calipatria 09:56:44 -59.0 Dark Up 49.0 284.4 Up 09:47:47 - 10:05:41 6028
Yuma 09:56:41 -58.4 Dark Up 48.2 285.1 Up 09:47:44 - 10:05:38 6008

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 2017/01/01 19:07:42 UT

Marc W. Buie, Southwest Research Institute

RECON