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 04:44:29 UTC

J2000 position of star is 18:35:45.2 -21:43:04
Equinox of date position of star is 18:36:49.8 -21:42:07
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 1924 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 04:44UT)
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 13.0 km RECON observability=1.0 and success probability=11.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:43:34 -14.8 AT Up 19.3 181.0 Really Low 04:28:34 - 04:58:34 -875
Tonasket 04:43:34 -14.9 AT Up 19.6 181.0 Really Low 04:28:34 - 04:58:34 -883
Okanogan 04:43:35 -15.0 AT Up 19.9 180.8 Really Low 04:28:35 - 04:58:35 -895
Brewster 04:43:37 -15.1 AT Up 20.2 180.6 Low 04:28:37 - 04:58:37 -903
Manson/Chelan 04:43:39 -15.1 AT Up 20.4 180.3 Low 04:28:39 - 04:58:39 -908
Entiat 04:43:39 -15.2 AT Up 20.6 180.2 Low 04:28:39 - 04:58:39 -916
Wenatchee 04:43:40 -15.3 AT Up 20.9 180.1 Low 04:28:40 - 04:58:40 -925
Ellensburg 04:43:41 -15.4 AT Up 21.3 179.9 Low 04:28:41 - 04:58:41 -940
Yakima 04:43:41 -15.7 AT Up 21.7 179.9 Low 04:28:41 - 04:58:41 -956
Toppenish/White Swan 04:43:40 -15.9 AT Up 21.9 180.1 Low 04:28:40 - 04:58:40 -966
Pasco 04:43:34 -16.6 AT Up 22.0 181.3 Low 04:28:34 - 04:58:34 -983
Goldendale 04:43:43 -16.0 AT Up 22.5 179.6 Low 04:28:43 - 04:58:43 -986
The Dalles 04:43:45 -15.9 AT Up 22.7 179.3 Low 04:28:45 - 04:58:45 -992
George/Umatilla 04:43:34 -16.7 AT Up 22.4 181.1 Low 04:28:34 - 04:58:34 -995
PNWRO 04:43:32 -16.9 AT Up 22.3 181.5 Low 04:28:32 - 04:58:32 -995
Maupin 04:43:45 -16.3 AT Up 23.1 179.4 Low 04:28:45 - 04:58:45 -1011
Madras/Culver 04:43:45 -16.6 AT Up 23.6 179.3 Low 04:28:45 - 04:58:45 -1034
Sisters 04:43:48 -16.5 AT Up 24.0 178.9 Low 04:28:48 - 04:58:48 -1046
Redmond 04:43:45 -16.8 AT Up 24.0 179.3 Low 04:28:45 - 04:58:45 -1050
Bend 04:43:46 -16.8 AT Up 24.2 179.2 Low 04:28:46 - 04:58:46 -1058
Oregon Observatory 04:43:47 -16.8 AT Up 24.4 179.0 Low 04:28:47 - 04:58:47 -1065
La Pine/Gilchrist 04:43:48 -16.9 AT Up 24.6 179.0 Low 04:28:48 - 04:58:48 -1074
North Lake 04:43:44 -17.5 AT Up 25.0 179.6 Low 04:28:44 - 04:58:44 -1099
Chiloquin 04:43:50 -17.4 AT Up 25.7 178.6 Low 04:28:50 - 04:58:50 -1123
Paisley 04:43:42 -18.1 Dark Up 25.6 179.9 Low 04:28:42 - 04:58:42 -1129
Klamath Falls 04:43:50 -17.7 AT Up 26.0 178.7 Low 04:28:50 - 04:58:50 -1140
Lakeview 04:43:42 -18.5 Dark Up 26.1 180.1 Low 04:28:42 - 04:58:42 -1155
Tulelake 04:43:48 -18.0 AT Up 26.3 179.0 Low 04:28:48 - 04:58:48 -1156
Cedarville 04:43:41 -19.0 Dark Up 26.8 180.3 Low 04:28:41 - 04:58:41 -1189
Fall River/Burney 04:43:48 -18.6 Dark Up 27.2 179.1 Low 04:28:48 - 04:58:48 -1202
Susanville 04:43:44 -19.4 Dark Up 27.9 179.8 Low 04:28:44 - 04:58:44 -1240
Greenville 04:43:45 -19.4 Dark Up 28.1 179.5 Low 04:28:45 - 04:58:45 -1252
Gimple 04:43:45 -19.4 Dark Up 28.1 179.6 Low 04:28:45 - 04:58:45 -1253
Quincy 04:43:46 -19.5 Dark Up 28.3 179.5 Low 04:28:46 - 04:58:46 -1263
Portola 04:43:44 -19.9 Dark Up 28.5 180.0 Low 04:28:44 - 04:58:44 -1274
Reno 04:43:39 -20.4 Dark Up 28.7 180.7 Low 04:28:39 - 04:58:39 -1294
Carson City 04:43:39 -20.7 Dark Up 29.1 180.7 Low 04:28:39 - 04:58:39 -1313
Gardnerville 04:43:39 -20.8 Dark Up 29.3 180.7 Low 04:28:39 - 04:58:39 -1327
Yerington 04:43:36 -21.2 Dark Up 29.3 181.4 Low 04:28:36 - 04:58:36 -1330
Hawthorne 04:43:32 -21.8 Dark Up 29.7 181.9 Low 04:28:32 - 04:58:32 -1361
Lee Vining 04:43:36 -21.8 Dark Up 30.3 181.4 Up 04:28:36 - 04:58:36 -1387
Tonopah 04:43:24 -22.9 Dark Up 30.1 183.4 Up 04:28:24 - 04:58:24 -1403
Bishop 04:43:32 -22.6 Dark Up 30.9 182.2 Up 04:28:32 - 04:58:32 -1429
Niwot 04:42:15 -28.0 Dark Up 26.6 195.5 Low 04:27:15 - 04:57:15 -1461
Beatty 04:43:22 -23.9 Dark Up 31.3 183.9 Up 04:28:22 - 04:58:22 -1474
Lone Pine 04:43:30 -23.3 Dark Up 31.6 182.6 Up 04:28:30 - 04:58:30 -1476
Indian Springs 04:43:15 -24.8 Dark Up 31.5 185.1 Up 04:28:15 - 04:58:15 -1506
CPSLO 04:43:47 -22.4 Dark Up 33.0 179.8 Up 04:28:47 - 04:58:47 -1526
Henderson 04:43:11 -25.5 Dark Up 32.0 185.9 Up 04:28:11 - 04:58:11 -1546
Searchlight/Boulder City 04:43:10 -25.9 Dark Up 32.6 186.0 Up 04:28:10 - 04:58:10 -1582
Patrick 04:43:04 -26.6 Dark Up 32.5 187.1 Up 04:28:04 - 04:58:04 -1599
Laughlin/Bullhead City 04:43:09 -26.3 Dark Up 32.9 186.4 Up 04:28:09 - 04:58:09 -1604
Kingman/Dolan Springs 04:43:05 -26.6 Dark Up 32.8 186.9 Up 04:28:05 - 04:58:05 -1610
Mohave Valley 04:43:09 -26.5 Dark Up 33.1 186.4 Up 04:28:09 - 04:58:09 -1621
Wildwood 04:43:34 -24.5 Dark Up 34.2 182.1 Up 04:28:34 - 04:58:34 -1621
DCO 04:43:00 -27.2 Dark Up 32.8 187.9 Up 04:28:00 - 04:58:00 -1628
Lake Havasu City 04:43:07 -26.9 Dark Up 33.5 186.7 Up 04:28:07 - 04:58:07 -1649
Idyllwild 04:43:22 -25.9 Dark Up 34.4 184.1 Up 04:28:22 - 04:58:22 -1666
Parker 04:43:07 -27.2 Dark Up 33.8 186.7 Up 04:28:07 - 04:58:07 -1672
Blythe 04:43:09 -27.3 Dark Up 34.4 186.5 Up 04:28:09 - 04:58:09 -1701
Calipatria 04:43:15 -27.0 Dark Up 35.0 185.5 Up 04:28:15 - 04:58:15 -1720
Yuma 04:43:09 -27.9 Dark Up 35.3 186.5 Up 04:28:09 - 04:58:09 -1760

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 04:44UT)
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 2017/12/05 18:53:05 UT

Marc W. Buie, Southwest Research Institute

RECON