RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-155538 with event index number of 144562

Geocentric closest approach at 2018/08/20 04:43:19 UTC

J2000 position of star is 18:35:45.2 -21:43:04
Equinox of date position of star is 18:36:47.7 -21:42:09
Stellar brightness R=15.7, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 68% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 36.4 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 14.1 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 521 seconds.
The 1-sigma cross-track error in the shadow position is 1932 km.
The sky-plane scale is 25923.4 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 32.7 sec chord
Diameter=188.3 km assuming a 30% albedo -- 13.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 01KD77, (2018/08/20 04:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.2 -26:28:18  0.9 29.15  12
Nunki          18:56:25.2 -26:16:19  2.0  6.39  25
PPM 268697     18:40:00.1 -21:02:06  6.1  0.99  21
PPM 268611     18:36:14.9 -21:57:52  8.2  0.30  20
PPM 268634     18:37:12.3 -21:25:43  9.1  0.28  20
01KD77         18:36:52.3 -21:42:05 15.7        20
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 1.7 sigma about the mid-time.
The median site spacing is 13.9 km RECON observability=0.9 and success probability=10.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:42:27 -14.6 AT Up 19.3 180.7 Really Low 04:27:27 - 04:57:27 -923
Tonasket 04:42:27 -14.8 AT Up 19.6 180.7 Really Low 04:27:27 - 04:57:27 -932
Okanogan 04:42:27 -14.9 AT Up 19.9 180.6 Really Low 04:27:27 - 04:57:27 -943
Brewster 04:42:28 -15.0 AT Up 20.2 180.4 Low 04:27:28 - 04:57:28 -952
Manson/Chelan 04:42:31 -14.9 AT Up 20.4 180.0 Low 04:27:31 - 04:57:31 -956
Entiat 04:42:31 -15.0 AT Up 20.6 179.9 Low 04:27:31 - 04:57:31 -964
Wenatchee 04:42:32 -15.1 AT Up 20.9 179.8 Low 04:27:32 - 04:57:32 -973
Ellensburg 04:42:33 -15.3 AT Up 21.3 179.6 Low 04:27:33 - 04:57:33 -988
Yakima 04:42:33 -15.5 AT Up 21.7 179.6 Low 04:27:33 - 04:57:33 -1004
Toppenish/White Swan 04:42:33 -15.7 AT Up 21.9 179.8 Low 04:27:33 - 04:57:33 -1015
Pasco 04:42:25 -16.5 AT Up 22.0 181.0 Low 04:27:25 - 04:57:25 -1031
Goldendale 04:42:35 -15.8 AT Up 22.5 179.4 Low 04:27:35 - 04:57:35 -1034
The Dalles 04:42:37 -15.8 AT Up 22.7 179.0 Low 04:27:37 - 04:57:37 -1041
George/Umatilla 04:42:27 -16.6 AT Up 22.4 180.8 Low 04:27:27 - 04:57:27 -1043
PNWRO 04:42:24 -16.8 AT Up 22.3 181.3 Low 04:27:24 - 04:57:24 -1043
Maupin 04:42:36 -16.1 AT Up 23.1 179.1 Low 04:27:36 - 04:57:36 -1059
Madras/Culver 04:42:37 -16.4 AT Up 23.6 179.1 Low 04:27:37 - 04:57:37 -1083
Sisters 04:42:40 -16.4 AT Up 24.0 178.6 Low 04:27:40 - 04:57:40 -1093
Redmond 04:42:37 -16.6 AT Up 24.0 179.0 Low 04:27:37 - 04:57:37 -1098
Bend 04:42:38 -16.7 AT Up 24.2 178.9 Low 04:27:38 - 04:57:38 -1106
Oregon Observatory 04:42:39 -16.7 AT Up 24.4 178.7 Low 04:27:39 - 04:57:39 -1113
La Pine/Gilchrist 04:42:40 -16.8 AT Up 24.6 178.7 Low 04:27:40 - 04:57:40 -1122
North Lake 04:42:36 -17.4 AT Up 25.0 179.3 Low 04:27:36 - 04:57:36 -1147
Chiloquin 04:42:42 -17.2 AT Up 25.7 178.3 Low 04:27:42 - 04:57:42 -1171
Paisley 04:42:34 -17.9 AT Up 25.6 179.6 Low 04:27:34 - 04:57:34 -1176
Klamath Falls 04:42:42 -17.5 AT Up 26.0 178.4 Low 04:27:42 - 04:57:42 -1188
Lakeview 04:42:34 -18.3 Dark Up 26.1 179.8 Low 04:27:34 - 04:57:34 -1202
Tulelake 04:42:40 -17.8 AT Up 26.3 178.7 Low 04:27:40 - 04:57:40 -1203
Cedarville 04:42:33 -18.8 Dark Up 26.8 180.0 Low 04:27:33 - 04:57:33 -1236
Fall River/Burney 04:42:40 -18.4 Dark Up 27.2 178.8 Low 04:27:40 - 04:57:40 -1249
Susanville 04:42:36 -19.2 Dark Up 27.9 179.5 Low 04:27:36 - 04:57:36 -1288
Greenville 04:42:38 -19.2 Dark Up 28.1 179.2 Low 04:27:38 - 04:57:38 -1300
Gimple 04:42:37 -19.3 Dark Up 28.1 179.3 Low 04:27:37 - 04:57:37 -1301
Quincy 04:42:38 -19.3 Dark Up 28.3 179.2 Low 04:27:38 - 04:57:38 -1310
Portola 04:42:36 -19.7 Dark Up 28.5 179.7 Low 04:27:36 - 04:57:36 -1321
Reno 04:42:32 -20.2 Dark Up 28.7 180.4 Low 04:27:32 - 04:57:32 -1342
Carson City 04:42:32 -20.5 Dark Up 29.1 180.4 Low 04:27:32 - 04:57:32 -1361
Gardnerville 04:42:31 -20.7 Dark Up 29.3 180.4 Low 04:27:31 - 04:57:31 -1375
Yerington 04:42:28 -21.0 Dark Up 29.3 181.1 Low 04:27:28 - 04:57:28 -1378
Hawthorne 04:42:25 -21.6 Dark Up 29.7 181.6 Low 04:27:25 - 04:57:25 -1409
Lee Vining 04:42:28 -21.6 Dark Up 30.3 181.1 Up 04:27:28 - 04:57:28 -1434
Tonopah 04:42:17 -22.7 Dark Up 30.2 183.1 Up 04:27:17 - 04:57:17 -1450
Bishop 04:42:24 -22.4 Dark Up 30.9 181.9 Up 04:27:24 - 04:57:24 -1476
Niwot 04:41:07 -27.8 Dark Up 26.7 195.2 Low 04:26:07 - 04:56:07 -1508
Beatty 04:42:15 -23.7 Dark Up 31.3 183.6 Up 04:27:15 - 04:57:15 -1522
Lone Pine 04:42:22 -23.1 Dark Up 31.6 182.3 Up 04:27:22 - 04:57:22 -1524
Indian Springs 04:42:07 -24.6 Dark Up 31.6 184.8 Up 04:27:07 - 04:57:07 -1554
CPSLO 04:42:39 -22.2 Dark Up 33.0 179.5 Up 04:27:39 - 04:57:39 -1574
Henderson 04:42:04 -25.3 Dark Up 32.0 185.6 Up 04:27:04 - 04:57:04 -1595
Searchlight/Boulder City 04:42:03 -25.7 Dark Up 32.6 185.7 Up 04:27:03 - 04:57:03 -1630
Patrick 04:41:56 -26.4 Dark Up 32.6 186.8 Up 04:26:56 - 04:56:56 -1647
Laughlin/Bullhead City 04:42:01 -26.2 Dark Up 32.9 186.1 Up 04:27:01 - 04:57:01 -1653
Kingman/Dolan Springs 04:41:58 -26.5 Dark Up 32.8 186.6 Up 04:26:58 - 04:56:58 -1658
Wildwood 04:42:26 -24.3 Dark Up 34.2 181.7 Up 04:27:26 - 04:57:26 -1670
Mohave Valley 04:42:01 -26.3 Dark Up 33.1 186.1 Up 04:27:01 - 04:57:01 -1670
DCO 04:41:52 -27.1 Dark Up 32.8 187.6 Up 04:26:52 - 04:56:52 -1675
Lake Havasu City 04:42:00 -26.7 Dark Up 33.5 186.4 Up 04:27:00 - 04:57:00 -1698
Idyllwild 04:42:15 -25.7 Dark Up 34.5 183.8 Up 04:27:15 - 04:57:15 -1713
Parker 04:42:00 -27.0 Dark Up 33.9 186.4 Up 04:27:00 - 04:57:00 -1720
Blythe 04:42:01 -27.1 Dark Up 34.4 186.1 Up 04:27:01 - 04:57:01 -1749
Calipatria 04:42:07 -26.8 Dark Up 35.0 185.2 Up 04:27:07 - 04:57:07 -1768
Yuma 04:42:01 -27.7 Dark Up 35.3 186.2 Up 04:27:01 - 04:57:01 -1808

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, (2018/08/20 04:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.15  12
Nunki          18:55:15.9 -26:17:49  2.0  6.39  25
PPM 268697     18:38:53.3 -21:03:10  6.1  0.99  21
PPM 268611     18:35:07.7 -21:58:50  8.2  0.30  20
PPM 268634     18:36:05.4 -21:26:42  9.1  0.28  20
01KD77         18:35:45.2 -21:43:04 15.7        20
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:36:06 UT

Marc W. Buie, Southwest Research Institute

RECON