RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-343-173207 with event index number of 194661

Geocentric closest approach at 2019/06/25 09:15:12 UTC

J2000 position of star is 18:47:59.3 -21:32:36
Equinox of date position of star is 18:49:03.7 -21:31:20
Stellar brightness R=14.7, use SENSEUP=128
Star is 82 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 36.5 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 378 seconds.
The 1-sigma cross-track error in the shadow position is 2021 km.
The sky-plane scale is 25740.1 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 19.3 sec chord
Diameter=188.3 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 01KD77, (2019/06/25 09:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.3 -26:28:25  0.9 31.93 113
Nunki          18:56:28.3 -26:16:15  2.0  5.04  81
30 Sgr         18:52:00.7 -22:08:18  6.3  0.91  82
PPM 268854     18:46:28.4 -20:58:49  6.6  0.83  83
PPM 268904     18:48:31.4 -21:06:56  9.8  0.43  82
01KD77         18:49:09.3 -21:31:14 14.7        82
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 11.4 km RECON observability=0.9 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:14:20 -15.8 AT Up 18.9 190.2 Really Low 08:59:20 - 09:29:20 7833
Tonasket 09:14:20 -16.0 AT Up 19.1 190.2 Really Low 08:59:20 - 09:29:20 7824
Okanogan 09:14:19 -16.4 AT Up 19.5 190.1 Really Low 08:59:19 - 09:29:19 7812
Brewster 09:14:21 -16.7 AT Up 19.8 189.9 Really Low 08:59:21 - 09:29:21 7804
Manson/Chelan 09:14:22 -17.0 AT Up 20.0 189.6 Low 08:59:22 - 09:29:22 7799
Entiat 09:14:21 -17.2 AT Up 20.3 189.5 Low 08:59:21 - 09:29:21 7791
Wenatchee 09:14:22 -17.4 AT Up 20.5 189.4 Low 08:59:22 - 09:29:22 7781
Ellensburg 09:14:22 -17.9 AT Up 21.0 189.2 Low 08:59:22 - 09:29:22 7767
Yakima 09:14:22 -18.3 Dark Up 21.4 189.2 Low 08:59:22 - 09:29:22 7750
Toppenish/White Swan 09:14:22 -18.4 Dark Up 21.5 189.4 Low 08:59:22 - 09:29:22 7738
Goldendale 09:14:22 -19.1 Dark Up 22.1 189.0 Low 08:59:22 - 09:29:22 7719
Pasco 09:14:18 -18.3 Dark Up 21.5 190.7 Low 08:59:18 - 09:29:18 7719
The Dalles 09:14:24 -19.3 Dark Up 22.4 188.7 Low 08:59:24 - 09:29:24 7713
George/Umatilla 09:14:18 -18.7 Dark Up 21.9 190.5 Low 08:59:18 - 09:29:18 7707
PNWRO 09:14:16 -18.5 Dark Up 21.7 190.9 Low 08:59:16 - 09:29:16 7705
Maupin 09:14:23 -19.7 Dark Up 22.8 188.8 Low 08:59:23 - 09:29:23 7693
Madras/Culver 09:14:23 -20.3 Dark Up 23.3 188.8 Low 08:59:23 - 09:29:23 7669
Sisters 09:14:24 -20.7 Dark Up 23.7 188.4 Low 08:59:24 - 09:29:24 7658
Redmond 09:14:23 -20.6 Dark Up 23.7 188.8 Low 08:59:23 - 09:29:23 7653
Bend 09:14:23 -20.8 Dark Up 23.9 188.7 Low 08:59:23 - 09:29:23 7644
Oregon Observatory 09:14:24 -21.0 Dark Up 24.1 188.5 Low 08:59:24 - 09:29:24 7637
La Pine/Gilchrist 09:14:24 -21.3 Dark Up 24.3 188.5 Low 08:59:24 - 09:29:24 7628
North Lake 09:14:22 -21.5 Dark Up 24.7 189.1 Low 08:59:22 - 09:29:22 7601
Chiloquin 09:14:25 -22.4 Dark Up 25.5 188.2 Low 08:59:25 - 09:29:25 7578
Paisley 09:14:21 -22.0 Dark Up 25.2 189.5 Low 08:59:21 - 09:29:21 7570
Klamath Falls 09:14:25 -22.7 Dark Up 25.8 188.3 Low 08:59:25 - 09:29:25 7560
Tulelake 09:14:23 -22.9 Dark Up 26.0 188.6 Low 08:59:23 - 09:29:23 7543
Lakeview 09:14:20 -22.4 Dark Up 25.7 189.8 Low 08:59:20 - 09:29:20 7542
Cedarville 09:14:19 -23.0 Dark Up 26.3 190.0 Low 08:59:19 - 09:29:19 7506
Fall River/Burney 09:14:23 -23.8 Dark Up 26.9 188.8 Low 08:59:23 - 09:29:23 7496
Susanville 09:14:20 -24.2 Dark Up 27.5 189.6 Low 08:59:20 - 09:29:20 7454
Greenville 09:14:22 -24.5 Dark Up 27.8 189.3 Low 08:59:22 - 09:29:22 7443
Gimple 09:14:21 -24.5 Dark Up 27.8 189.4 Low 08:59:21 - 09:29:21 7441
Quincy 09:14:21 -24.7 Dark Up 28.0 189.3 Low 08:59:21 - 09:29:21 7432
Portola 09:14:20 -24.7 Dark Up 28.0 189.9 Low 08:59:20 - 09:29:20 7419
Reno 09:14:17 -24.8 Dark Up 28.2 190.5 Low 08:59:17 - 09:29:17 7397
Carson City 09:14:17 -25.2 Dark Up 28.6 190.6 Low 08:59:17 - 09:29:17 7376
Gardnerville 09:14:17 -25.4 Dark Up 28.8 190.7 Low 08:59:17 - 09:29:17 7362
Yerington 09:14:15 -25.2 Dark Up 28.7 191.3 Low 08:59:15 - 09:29:15 7357
Hawthorne 09:14:13 -25.5 Dark Up 29.0 191.9 Low 08:59:13 - 09:29:13 7324
Lee Vining 09:14:15 -26.2 Dark Up 29.7 191.4 Low 08:59:15 - 09:29:15 7298
Tonopah 09:14:08 -25.6 Dark Up 29.2 193.4 Low 08:59:08 - 09:29:08 7278
Bishop 09:14:11 -26.5 Dark Up 30.1 192.3 Up 08:59:11 - 09:29:11 7254
Lone Pine 09:14:10 -27.2 Dark Up 30.8 192.7 Up 08:59:10 - 09:29:10 7204
Beatty 09:14:06 -26.5 Dark Up 30.3 194.0 Up 08:59:06 - 09:29:06 7204
Niwot 09:13:29 -19.6 Dark Up 24.3 205.0 Low 08:58:29 - 09:28:29 7194
Indian Springs 09:14:02 -26.5 Dark Up 30.4 195.2 Up 08:59:02 - 09:29:02 7168
CPSLO 09:14:19 -29.1 Dark Up 32.5 190.1 Up 08:59:19 - 09:29:19 7160
Henderson 09:13:59 -26.8 Dark Up 30.8 196.0 Up 08:58:59 - 09:28:59 7125
Searchlight/Boulder City 09:13:59 -27.3 Dark Up 31.3 196.1 Up 08:58:59 - 09:28:59 7088
Patrick 09:13:55 -27.0 Dark Up 31.1 197.3 Up 08:58:55 - 09:28:55 7068
Laughlin/Bullhead City 09:13:57 -27.4 Dark Up 31.5 196.6 Up 08:58:57 - 09:28:57 7064
Kingman/Dolan Springs 09:13:56 -27.2 Dark Up 31.4 197.1 Up 08:58:56 - 09:28:56 7057
Wildwood 09:14:11 -29.7 Dark Up 33.4 192.5 Up 08:59:11 - 09:29:11 7056
Mohave Valley 09:13:57 -27.7 Dark Up 31.8 196.6 Up 08:58:57 - 09:28:57 7047
DCO 09:13:52 -27.0 Dark Up 31.2 198.0 Up 08:58:52 - 09:28:52 7037
Lake Havasu City 09:13:56 -28.0 Dark Up 32.1 196.9 Up 08:58:56 - 09:28:56 7017
Idyllwild 09:14:04 -29.4 Dark Up 33.3 194.5 Up 08:59:04 - 09:29:04 7006
Parker 09:13:56 -28.3 Dark Up 32.4 197.0 Up 08:58:56 - 09:28:56 6994
Blythe 09:13:57 -28.8 Dark Up 33.0 196.8 Up 08:58:57 - 09:28:57 6965
Calipatria 09:14:00 -29.6 Dark Up 33.7 195.9 Up 08:59:00 - 09:29:00 6948
Yuma 09:13:57 -29.7 Dark Up 33.9 197.0 Up 08:58:57 - 09:28:57 6905

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 01KD77, (2019/06/25 09:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.93 113
Nunki          18:55:15.9 -26:17:49  2.0  5.04  81
30 Sgr         18:50:50.5 -22:09:44  6.3  0.91  82
PPM 268854     18:45:18.7 -21:00:07  6.6  0.83  83
PPM 268904     18:47:21.6 -21:08:18  9.8  0.43  82
01KD77         18:47:59.3 -21:32:36 14.7        82
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:04:44 UT

Marc W. Buie, Southwest Research Institute

RECON