RECON: TNO occultation with 29981

Event between (29981) 99TD10 and star UC4-534-034824 with event index number of 177339

Geocentric closest approach at 2019/01/26 06:16:21 UTC

J2000 position of star is 06:53:04.1 +16:46:55
Equinox of date position of star is 06:54:04.3 +16:45:34
Stellar brightness R=15.2, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 68% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 30.4 AU from the Sun and 29.5 AU from the Earth.
The TNO is moving 23.2 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 316 seconds.
The 1-sigma cross-track error in the shadow position is 1162 km.
The sky-plane scale is 21398.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 4.7 sec chord
Diameter=44.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 29981, (2019/01/26 06:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.9 +27:58:43  1.1 16.47  82
Alhena         06:38:48.8 +16:22:53  1.9  3.70  97
33 Gem         06:50:55.7 +16:10:47  5.9  0.97  94
PPM 123167     06:52:58.4 +16:35:19  7.9  0.33  94
PPM 123183     06:53:28.0 +16:43:13  9.7  0.17  93
29981          06:54:10.2 +16:45:26 15.2        93
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 2.8 sigma about the mid-time.
The median site spacing is 24.0 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:16:52 -52.2 Dark Down 57.7 174.2 Up 06:01:52 - 06:31:52 8992
Tonasket 06:16:53 -52.4 Dark Down 58.0 174.2 Up 06:01:53 - 06:31:53 8971
Okanogan 06:16:53 -52.5 Dark Down 58.3 173.8 Up 06:01:53 - 06:31:53 8937
Brewster 06:16:54 -52.6 Dark Down 58.6 173.4 Up 06:01:54 - 06:31:54 8910
Manson/Chelan 06:16:54 -52.6 Dark Down 58.7 172.7 Up 06:01:54 - 06:31:54 8887
Entiat 06:16:54 -52.7 Dark Down 58.9 172.5 Up 06:01:54 - 06:31:54 8865
Wenatchee 06:16:55 -52.8 Dark Down 59.2 172.3 Up 06:01:55 - 06:31:55 8840
Ellensburg 06:16:55 -52.9 Dark Down 59.6 171.8 Up 06:01:55 - 06:31:55 8798
Yakima 06:16:55 -53.2 Dark Down 60.0 171.7 Up 06:01:55 - 06:31:55 8759
Pasco 06:16:50 -54.1 Dark Down 60.4 174.3 Up 06:01:50 - 06:31:50 8741
Toppenish/White Swan 06:16:54 -53.4 Dark Down 60.2 171.9 Up 06:01:54 - 06:31:54 8740
PNWRO 06:16:50 -54.4 Dark Down 60.7 174.7 Up 06:01:50 - 06:31:50 8719
George/Umatilla 06:16:50 -54.2 Dark Down 60.7 173.8 Up 06:01:50 - 06:31:50 8706
Goldendale 06:16:56 -53.5 Dark Down 60.7 171.0 Up 06:01:56 - 06:31:56 8682
The Dalles 06:16:57 -53.5 Dark Down 60.9 170.2 Up 06:01:57 - 06:31:57 8657
Maupin 06:16:56 -53.8 Dark Down 61.3 170.3 Up 06:01:56 - 06:31:56 8617
Madras/Culver 06:16:56 -54.1 Dark Down 61.8 170.0 Up 06:01:56 - 06:31:56 8563
Redmond 06:16:56 -54.2 Dark Down 62.2 169.8 Up 06:01:56 - 06:31:56 8528
Sisters 06:16:58 -54.0 Dark Down 62.1 169.0 Up 06:01:58 - 06:31:58 8526
Bend 06:16:57 -54.3 Dark Down 62.4 169.4 Up 06:01:57 - 06:31:57 8505
Oregon Observatory 06:16:57 -54.3 Dark Down 62.5 169.1 Up 06:01:57 - 06:31:57 8487
La Pine/Gilchrist 06:16:57 -54.4 Dark Down 62.7 168.9 Up 06:01:57 - 06:31:57 8466
North Lake 06:16:55 -55.0 Dark Down 63.2 170.0 Up 06:01:55 - 06:31:55 8429
Paisley 06:16:54 -55.5 Dark Down 63.8 170.6 Up 06:01:54 - 06:31:54 8378
Chiloquin 06:16:58 -54.8 Dark Down 63.8 167.7 Up 06:01:58 - 06:31:58 8352
Niwot 06:15:58 -65.4 Dark Up 64.9 205.0 Up 06:00:58 - 06:30:58 8332
Lakeview 06:16:53 -55.9 Dark Down 64.4 170.8 Up 06:01:53 - 06:31:53 8329
Klamath Falls 06:16:58 -55.0 Dark Down 64.1 167.8 Up 06:01:58 - 06:31:58 8319
Tulelake 06:16:57 -55.4 Dark Down 64.4 168.3 Up 06:01:57 - 06:31:57 8295
Cedarville 06:16:51 -56.4 Dark Down 65.0 171.0 Up 06:01:51 - 06:31:51 8265
Fall River/Burney 06:16:56 -55.9 Dark Down 65.3 168.1 Up 06:01:56 - 06:31:56 8204
Susanville 06:16:53 -56.7 Dark Down 66.1 169.5 Up 06:01:53 - 06:31:53 8148
Gimple 06:16:54 -56.7 Dark Down 66.3 168.9 Up 06:01:54 - 06:31:54 8117
Greenville 06:16:54 -56.7 Dark Down 66.3 168.7 Up 06:01:54 - 06:31:54 8117
Quincy 06:16:54 -56.8 Dark Down 66.5 168.6 Up 06:01:54 - 06:31:54 8096
Portola 06:16:53 -57.1 Dark Down 66.7 169.7 Up 06:01:53 - 06:31:53 8088
Reno 06:16:50 -57.7 Dark Down 67.0 171.1 Up 06:01:50 - 06:31:50 8068
Carson City 06:16:49 -57.9 Dark Down 67.4 171.0 Up 06:01:49 - 06:31:49 8032
Yerington 06:16:47 -58.4 Dark Down 67.6 172.5 Up 06:01:47 - 06:31:47 8019
Gardnerville 06:16:49 -58.1 Dark Down 67.6 171.0 Up 06:01:49 - 06:31:49 8008
Hawthorne 06:16:44 -59.0 Dark Down 68.1 173.7 Up 06:01:44 - 06:31:44 7978
Tonopah 06:16:39 -60.2 Dark Down 68.7 177.2 Up 06:01:39 - 06:31:39 7947
Lee Vining 06:16:46 -59.0 Dark Down 68.7 172.3 Up 06:01:46 - 06:31:46 7915
Bishop 06:16:43 -59.8 Dark Down 69.3 174.0 Up 06:01:43 - 06:31:43 7861
Beatty 06:16:36 -61.1 Dark Down 69.9 178.3 Up 06:01:36 - 06:31:36 7834
Indian Springs 06:16:32 -62.0 Dark Down 70.2 181.3 Up 06:01:32 - 06:31:32 7814
Lone Pine 06:16:41 -60.4 Dark Down 70.1 174.7 Up 06:01:41 - 06:31:41 7787
Henderson 06:16:30 -62.7 Dark Down 70.7 183.3 Up 06:01:30 - 06:31:30 7768
Patrick 06:16:24 -63.8 Dark Down 71.3 186.7 Up 06:01:24 - 06:31:24 7719
Searchlight/Boulder City 06:16:28 -63.1 Dark Down 71.3 183.6 Up 06:01:28 - 06:31:28 7710
DCO 06:16:21 -64.5 Dark Down 71.5 188.9 Up 06:01:21 - 06:31:21 7698
Kingman/Dolan Springs 06:16:25 -63.8 Dark Down 71.5 186.2 Up 06:01:25 - 06:31:25 7694
Laughlin/Bullhead City 06:16:27 -63.5 Dark Down 71.6 184.6 Up 06:01:27 - 06:31:27 7684
Mohave Valley 06:16:27 -63.6 Dark Down 71.8 184.7 Up 06:01:27 - 06:31:27 7655
CPSLO 06:16:51 -59.1 Dark Down 71.1 166.7 Up 06:01:51 - 06:31:51 7620
Lake Havasu City 06:16:26 -64.0 Dark Down 72.2 185.6 Up 06:01:26 - 06:31:26 7617
Parker 06:16:25 -64.2 Dark Down 72.6 185.8 Up 06:01:25 - 06:31:25 7581
Blythe 06:16:26 -64.3 Dark Down 73.1 185.0 Up 06:01:26 - 06:31:26 7522
Wildwood 06:16:42 -61.1 Dark Down 72.6 172.2 Up 06:01:42 - 06:31:42 7518
Idyllwild 06:16:34 -62.7 Dark Down 73.0 178.1 Up 06:01:34 - 06:31:34 7505
Calipatria 06:16:29 -63.8 Dark Down 73.6 182.0 Up 06:01:29 - 06:31:29 7457
Yuma 06:16:25 -64.7 Dark Down 74.0 185.1 Up 06:01:25 - 06:31:25 7424

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 29981, (2019/01/26 06:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 16.47  82
Alhena         06:37:42.8 +16:23:57  1.9  3.70  97
33 Gem         06:49:49.8 +16:12:10  5.9  0.97  94
PPM 123167     06:51:52.4 +16:36:46  7.9  0.33  94
PPM 123183     06:52:21.9 +16:44:40  9.7  0.17  93
29981          06:53:04.1 +16:46:55 15.2        93
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:09:13 UT

Marc W. Buie, Southwest Research Institute

RECON