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 06:54:06.2 +16:45:32
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 381 seconds.
The 1-sigma cross-track error in the shadow position is 1203 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 2.4 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 06:16:54 -52.2 Dark Down 57.7 174.2 Up 06:01:54 - 06:31:54 8989
Tonasket 06:16:54 -52.4 Dark Down 58.0 174.2 Up 06:01:54 - 06:31:54 8968
Okanogan 06:16:53 -52.5 Dark Down 58.3 173.8 Up 06:01:53 - 06:31:53 8934
Brewster 06:16:54 -52.6 Dark Down 58.6 173.4 Up 06:01:54 - 06:31:54 8907
Manson/Chelan 06:16:55 -52.6 Dark Down 58.7 172.7 Up 06:01:55 - 06:31:55 8884
Entiat 06:16:55 -52.7 Dark Down 58.9 172.6 Up 06:01:55 - 06:31:55 8862
Wenatchee 06:16:56 -52.8 Dark Down 59.2 172.3 Up 06:01:56 - 06:31:56 8837
Ellensburg 06:16:56 -52.9 Dark Down 59.6 171.8 Up 06:01:56 - 06:31:56 8795
Yakima 06:16:56 -53.2 Dark Down 60.0 171.7 Up 06:01:56 - 06:31:56 8756
Pasco 06:16:51 -54.1 Dark Down 60.4 174.3 Up 06:01:51 - 06:31:51 8738
Toppenish/White Swan 06:16:56 -53.4 Dark Down 60.2 171.9 Up 06:01:56 - 06:31:56 8737
PNWRO 06:16:50 -54.4 Dark Down 60.7 174.7 Up 06:01:50 - 06:31:50 8716
George/Umatilla 06:16:52 -54.2 Dark Down 60.7 173.9 Up 06:01:52 - 06:31:52 8703
Goldendale 06:16:56 -53.5 Dark Down 60.7 171.0 Up 06:01:56 - 06:31:56 8679
The Dalles 06:16:57 -53.5 Dark Down 60.9 170.2 Up 06:01:57 - 06:31:57 8654
Maupin 06:16:57 -53.8 Dark Down 61.3 170.3 Up 06:01:57 - 06:31:57 8614
Madras/Culver 06:16:57 -54.1 Dark Down 61.8 170.0 Up 06:01:57 - 06:31:57 8560
Redmond 06:16:57 -54.2 Dark Down 62.2 169.8 Up 06:01:57 - 06:31:57 8524
Sisters 06:16:59 -54.0 Dark Down 62.1 169.0 Up 06:01:59 - 06:31:59 8523
Bend 06:16:57 -54.3 Dark Down 62.4 169.5 Up 06:01:57 - 06:31:57 8502
Oregon Observatory 06:16:58 -54.3 Dark Down 62.5 169.1 Up 06:01:58 - 06:31:58 8483
La Pine/Gilchrist 06:16:58 -54.4 Dark Down 62.7 168.9 Up 06:01:58 - 06:31:58 8463
North Lake 06:16:56 -55.0 Dark Down 63.2 170.0 Up 06:01:56 - 06:31:56 8425
Paisley 06:16:54 -55.5 Dark Down 63.8 170.6 Up 06:01:54 - 06:31:54 8374
Chiloquin 06:16:59 -54.8 Dark Down 63.8 167.7 Up 06:01:59 - 06:31:59 8349
Niwot 06:15:58 -65.4 Dark Up 64.9 205.0 Up 06:00:58 - 06:30:58 8326
Lakeview 06:16:53 -55.9 Dark Down 64.4 170.8 Up 06:01:53 - 06:31:53 8326
Klamath Falls 06:16:58 -55.0 Dark Down 64.1 167.8 Up 06:01:58 - 06:31:58 8315
Tulelake 06:16:57 -55.4 Dark Down 64.4 168.3 Up 06:01:57 - 06:31:57 8291
Cedarville 06:16:52 -56.4 Dark Down 65.0 171.0 Up 06:01:52 - 06:31:52 8262
Fall River/Burney 06:16:57 -55.9 Dark Down 65.3 168.1 Up 06:01:57 - 06:31:57 8200
Susanville 06:16:54 -56.7 Dark Down 66.1 169.5 Up 06:01:54 - 06:31:54 8144
Gimple 06:16:54 -56.7 Dark Down 66.3 168.9 Up 06:01:54 - 06:31:54 8114
Greenville 06:16:55 -56.7 Dark Down 66.3 168.7 Up 06:01:55 - 06:31:55 8113
Quincy 06:16:55 -56.8 Dark Down 66.5 168.6 Up 06:01:55 - 06:31:55 8092
Portola 06:16:53 -57.1 Dark Down 66.7 169.7 Up 06:01:53 - 06:31:53 8085
Reno 06:16:50 -57.7 Dark Down 67.0 171.1 Up 06:01:50 - 06:31:50 8065
Carson City 06:16:50 -57.9 Dark Down 67.4 171.0 Up 06:01:50 - 06:31:50 8028
Yerington 06:16:48 -58.4 Dark Down 67.6 172.5 Up 06:01:48 - 06:31:48 8015
Gardnerville 06:16:50 -58.1 Dark Down 67.6 171.0 Up 06:01:50 - 06:31:50 8004
Hawthorne 06:16:46 -59.0 Dark Down 68.2 173.7 Up 06:01:46 - 06:31:46 7974
Tonopah 06:16:40 -60.2 Dark Down 68.7 177.2 Up 06:01:40 - 06:31:40 7943
Lee Vining 06:16:47 -59.0 Dark Down 68.7 172.3 Up 06:01:47 - 06:31:47 7910
Bishop 06:16:44 -59.8 Dark Down 69.3 174.0 Up 06:01:44 - 06:31:44 7857
Beatty 06:16:38 -61.1 Dark Down 69.9 178.3 Up 06:01:38 - 06:31:38 7830
Indian Springs 06:16:33 -62.0 Dark Down 70.2 181.3 Up 06:01:33 - 06:31:33 7810
Lone Pine 06:16:43 -60.4 Dark Down 70.1 174.7 Up 06:01:43 - 06:31:43 7783
Henderson 06:16:30 -62.7 Dark Down 70.7 183.3 Up 06:01:30 - 06:31:30 7764
Patrick 06:16:25 -63.8 Dark Down 71.3 186.7 Up 06:01:25 - 06:31:25 7715
Searchlight/Boulder City 06:16:30 -63.1 Dark Down 71.3 183.6 Up 06:01:30 - 06:31:30 7706
DCO 06:16:22 -64.5 Dark Down 71.5 188.9 Up 06:01:22 - 06:31:22 7693
Kingman/Dolan Springs 06:16:26 -63.8 Dark Down 71.5 186.2 Up 06:01:26 - 06:31:26 7689
Laughlin/Bullhead City 06:16:28 -63.5 Dark Down 71.6 184.7 Up 06:01:28 - 06:31:28 7680
Mohave Valley 06:16:28 -63.6 Dark Down 71.8 184.7 Up 06:01:28 - 06:31:28 7651
CPSLO 06:16:52 -59.1 Dark Down 71.1 166.8 Up 06:01:52 - 06:31:52 7617
Lake Havasu City 06:16:27 -64.0 Dark Down 72.2 185.6 Up 06:01:27 - 06:31:27 7613
Parker 06:16:26 -64.2 Dark Down 72.6 185.8 Up 06:01:26 - 06:31:26 7577
Blythe 06:16:27 -64.3 Dark Down 73.1 185.0 Up 06:01:27 - 06:31:27 7518
Wildwood 06:16:43 -61.1 Dark Down 72.6 172.2 Up 06:01:43 - 06:31:43 7514
Idyllwild 06:16:35 -62.7 Dark Down 73.0 178.1 Up 06:01:35 - 06:31:35 7501
Calipatria 06:16:30 -63.8 Dark Down 73.6 182.0 Up 06:01:30 - 06:31:30 7453
Yuma 06:16:27 -64.7 Dark Down 74.0 185.2 Up 06:01:27 - 06:31:27 7420

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 2017/12/05 19:12:04 UT

Marc W. Buie, Southwest Research Institute

RECON