RECON: TNO occultation with 29981

Event between (29981) 99TD10 and star GA1060:02450579 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 06:54:08.0 +16:45:29
Stellar brightness G=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         07:46:28.8 +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 25.2 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)
Penticton 06:18:39 -51.9 Dark Down 57.2 174.9 Up 06:03:39 - 06:33:39 9156
Oroville 06:18:38 -52.4 Dark Down 57.8 175.0 Up 06:03:38 - 06:33:38 9101
Tonasket 06:18:38 -52.6 Dark Down 58.0 175.0 Up 06:03:38 - 06:33:38 9079
Okanogan 06:18:38 -52.7 Dark Down 58.3 174.6 Up 06:03:38 - 06:33:38 9046
Brewster 06:18:39 -52.8 Dark Down 58.6 174.2 Up 06:03:39 - 06:33:39 9018
Manson/Chelan 06:18:40 -52.8 Dark Down 58.8 173.5 Up 06:03:40 - 06:33:40 8995
Entiat 06:18:40 -52.9 Dark Down 59.0 173.4 Up 06:03:40 - 06:33:40 8974
Wenatchee 06:18:40 -53.0 Dark Down 59.2 173.1 Up 06:03:40 - 06:33:40 8948
Ellensburg 06:18:41 -53.2 Dark Down 59.6 172.6 Up 06:03:41 - 06:33:41 8907
Yakima 06:18:41 -53.4 Dark Down 60.0 172.5 Up 06:03:41 - 06:33:41 8867
Pasco 06:18:36 -54.4 Dark Down 60.5 175.2 Up 06:03:36 - 06:33:36 8849
Toppenish/White Swan 06:18:40 -53.6 Dark Down 60.2 172.8 Up 06:03:40 - 06:33:40 8848
PNWRO 06:18:35 -54.7 Dark Down 60.7 175.6 Up 06:03:35 - 06:33:35 8828
George/Umatilla 06:18:36 -54.5 Dark Down 60.8 174.7 Up 06:03:36 - 06:33:36 8815
Goldendale 06:18:42 -53.8 Dark Down 60.8 171.8 Up 06:03:42 - 06:33:42 8791
The Dalles 06:18:42 -53.7 Dark Down 60.9 171.1 Up 06:03:42 - 06:33:42 8765
Maupin 06:18:42 -54.0 Dark Down 61.4 171.2 Up 06:03:42 - 06:33:42 8726
Madras/Culver 06:18:42 -54.3 Dark Down 61.9 170.9 Up 06:03:42 - 06:33:42 8672
Redmond 06:18:42 -54.5 Dark Down 62.2 170.7 Up 06:03:42 - 06:33:42 8636
Sisters 06:18:43 -54.3 Dark Down 62.2 169.9 Up 06:03:43 - 06:33:43 8634
Bend 06:18:42 -54.5 Dark Down 62.4 170.4 Up 06:03:42 - 06:33:42 8613
Oregon Observatory 06:18:42 -54.6 Dark Down 62.6 170.0 Up 06:03:42 - 06:33:42 8595
La Pine/Gilchrist 06:18:42 -54.7 Dark Down 62.8 169.8 Up 06:03:42 - 06:33:42 8574
North Lake 06:18:40 -55.3 Dark Down 63.3 170.9 Up 06:03:40 - 06:33:40 8537
Paisley 06:18:39 -55.8 Dark Down 63.9 171.5 Up 06:03:39 - 06:33:39 8486
Chiloquin 06:18:43 -55.1 Dark Down 63.8 168.7 Up 06:03:43 - 06:33:43 8460
Niwot 06:17:44 -65.6 Dark Up 64.7 206.0 Up 06:02:44 - 06:32:44 8441
Lakeview 06:18:39 -56.2 Dark Down 64.4 171.8 Up 06:03:39 - 06:33:39 8438
Klamath Falls 06:18:43 -55.3 Dark Down 64.2 168.7 Up 06:03:43 - 06:33:43 8427
Tulelake 06:18:42 -55.6 Dark Down 64.5 169.3 Up 06:03:42 - 06:33:42 8403
Cedarville 06:18:37 -56.7 Dark Down 65.1 172.0 Up 06:03:37 - 06:33:37 8374
Fall River/Burney 06:18:42 -56.2 Dark Down 65.4 169.1 Up 06:03:42 - 06:33:42 8312
Susanville 06:18:39 -57.0 Dark Down 66.1 170.5 Up 06:03:39 - 06:33:39 8256
Gimple 06:18:39 -57.0 Dark Down 66.4 169.9 Up 06:03:39 - 06:33:39 8226
Greenville 06:18:39 -56.9 Dark Down 66.3 169.7 Up 06:03:39 - 06:33:39 8225
Quincy 06:18:40 -57.1 Dark Down 66.5 169.6 Up 06:03:40 - 06:33:40 8204
Portola 06:18:38 -57.4 Dark Down 66.7 170.7 Up 06:03:38 - 06:33:38 8197
Reno 06:18:35 -58.0 Dark Down 67.1 172.2 Up 06:03:35 - 06:33:35 8177
Carson City 06:18:35 -58.2 Dark Down 67.4 172.1 Up 06:03:35 - 06:33:35 8140
Yerington 06:18:32 -58.7 Dark Down 67.7 173.6 Up 06:03:32 - 06:33:32 8128
Gardnerville 06:18:35 -58.3 Dark Down 67.7 172.1 Up 06:03:35 - 06:33:35 8116
Hawthorne 06:18:30 -59.3 Dark Down 68.2 174.8 Up 06:03:30 - 06:33:30 8087
Tonopah 06:18:25 -60.5 Dark Down 68.7 178.4 Up 06:03:25 - 06:33:25 8056
Lee Vining 06:18:32 -59.3 Dark Down 68.7 173.4 Up 06:03:32 - 06:33:32 8023
Bishop 06:18:29 -60.1 Dark Down 69.4 175.2 Up 06:03:29 - 06:33:29 7970
Beatty 06:18:22 -61.4 Dark Down 69.9 179.5 Up 06:03:22 - 06:33:22 7943
Indian Springs 06:18:19 -62.3 Dark Down 70.2 182.5 Up 06:03:19 - 06:33:19 7923
Lone Pine 06:18:28 -60.7 Dark Down 70.1 175.9 Up 06:03:28 - 06:33:28 7895
Henderson 06:18:15 -63.0 Dark Down 70.7 184.6 Up 06:03:15 - 06:33:15 7878
Patrick 06:18:10 -64.1 Dark Down 71.2 188.0 Up 06:03:10 - 06:33:10 7829
Searchlight/Boulder City 06:18:14 -63.4 Dark Down 71.3 184.9 Up 06:03:14 - 06:33:14 7819
DCO 06:18:07 -64.8 Dark Down 71.4 190.2 Up 06:03:07 - 06:33:07 7807
Kingman/Dolan Springs 06:18:11 -64.1 Dark Down 71.5 187.5 Up 06:03:11 - 06:33:11 7803
Laughlin/Bullhead City 06:18:13 -63.8 Dark Down 71.5 186.0 Up 06:03:13 - 06:33:13 7793
Mohave Valley 06:18:12 -63.9 Dark Down 71.8 186.1 Up 06:03:12 - 06:33:12 7765
CPSLO 06:18:36 -59.4 Dark Down 71.1 168.0 Up 06:03:36 - 06:33:36 7729
Lake Havasu City 06:18:12 -64.3 Dark Down 72.2 187.0 Up 06:03:12 - 06:33:12 7727
Parker 06:18:11 -64.5 Dark Down 72.5 187.2 Up 06:03:11 - 06:33:11 7690
Blythe 06:18:11 -64.6 Dark Down 73.1 186.4 Up 06:03:11 - 06:33:11 7631
Wildwood 06:18:28 -61.5 Dark Down 72.6 173.6 Up 06:03:28 - 06:33:28 7627
Idyllwild 06:18:21 -63.0 Dark Down 73.0 179.6 Up 06:03:21 - 06:33:21 7614
Calipatria 06:18:15 -64.1 Dark Down 73.6 183.5 Up 06:03:15 - 06:33:15 7566
Yuma 06:18:12 -65.0 Dark Down 74.0 186.7 Up 06:03:12 - 06:33:12 7534

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 2018/06/11 19:33:34 UT

Marc W. Buie, Southwest Research Institute

RECON