Event between 98WV31 and star GA1140:00873958 with event index number of 333089
Geocentric closest approach at 2019/12/18 11:02:12 UTC
J2000 position of star is 04:55:00.1 +24:19:38
Equinox of date position of star is 04:56:11.2 +24:21:26
Stellar brightness G=15.0,
use SENSEUP=128
Star is 91 degrees from the moon.
Moon is 59% illuminated.
TNO apparent brightness V=24.0
[RECON map]
TNO is 38.8 AU from the Sun
and 37.8 AU from the Earth.
The TNO is moving 25.1
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 293 seconds.
The 1-sigma cross-track error in the shadow position is
2077 km.
The sky-plane scale is
27407.9 km/arcsec.
The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 5.8 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 3:2E
Star training set for 98WV31, (2019/12/18 11:02UT) Object RA Dec mag sep mel Aldebaran 04:37:04.1 +16:32:52 0.8 9.00 97 Alnath 05:27:33.3 +28:37:21 1.6 8.20 83 98 Tau 04:59:22.8 +25:04:46 5.8 1.02 90 PPM 093905 04:57:28.7 +24:37:21 7.0 0.39 91 PPM 093880 04:55:57.8 +24:07:38 11.3 0.24 91 98WV31 04:56:13.1 +24:21:29 15.0 91 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
3.1 sigma about the mid-time.
The median site spacing is 19.9 km
RECON observability=1.0 and success probability=11.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 10:59:40 | -45.3 | Dark | Up | 38.4 | 262.8 | Up | 10:44:40 - 11:14:40 | -2450 |
| Summerland | 10:59:39 | -45.6 | Dark | Up | 38.6 | 262.8 | Up | 10:44:39 - 11:14:39 | -2483 |
| Penticton | 10:59:39 | -45.5 | Dark | Up | 38.6 | 262.9 | Up | 10:44:39 - 11:14:39 | -2487 |
| Okanagan Falls | 10:59:39 | -45.6 | Dark | Up | 38.6 | 263.1 | Up | 10:44:39 - 11:14:39 | -2504 |
| Oliver | 10:59:38 | -45.7 | Dark | Up | 38.6 | 263.2 | Up | 10:44:38 - 11:14:38 | -2519 |
| Anarchist Mountain Observatory | 10:59:37 | -45.6 | Dark | Up | 38.5 | 263.5 | Up | 10:44:37 - 11:14:37 | -2530 |
| Oroville | 10:59:37 | -45.7 | Dark | Up | 38.6 | 263.5 | Up | 10:44:37 - 11:14:37 | -2539 |
| Tonasket | 10:59:37 | -45.7 | Dark | Up | 38.6 | 263.7 | Up | 10:44:37 - 11:14:37 | -2560 |
| Okanogan | 10:59:36 | -45.9 | Dark | Up | 38.7 | 263.8 | Up | 10:44:36 - 11:14:36 | -2594 |
| Brewster | 10:59:36 | -46.1 | Dark | Up | 38.9 | 263.9 | Up | 10:44:36 - 11:14:36 | -2624 |
| Manson/Chelan | 10:59:36 | -46.4 | Dark | Up | 39.2 | 263.8 | Up | 10:44:36 - 11:14:36 | -2651 |
| Entiat | 10:59:35 | -46.6 | Dark | Up | 39.2 | 263.9 | Up | 10:44:35 - 11:14:35 | -2673 |
| Wenatchee | 10:59:35 | -46.7 | Dark | Up | 39.3 | 264.0 | Up | 10:44:35 - 11:14:35 | -2699 |
| Ellensburg | 10:59:35 | -47.0 | Dark | Up | 39.5 | 264.2 | Up | 10:44:35 - 11:14:35 | -2743 |
| Pasco | 10:59:31 | -46.2 | Dark | Up | 38.6 | 265.9 | Up | 10:44:31 - 11:14:31 | -2781 |
| Yakima | 10:59:34 | -47.1 | Dark | Up | 39.6 | 264.5 | Up | 10:44:34 - 11:14:34 | -2781 |
| Toppenish/White Swan | 10:59:33 | -47.1 | Dark | Up | 39.5 | 264.8 | Up | 10:44:33 - 11:14:33 | -2798 |
| PNWRO | 10:59:29 | -46.2 | Dark | Up | 38.5 | 266.2 | Up | 10:44:29 - 11:14:29 | -2799 |
| George/Umatilla | 10:59:30 | -46.5 | Dark | Up | 38.8 | 266.0 | Up | 10:44:30 - 11:14:30 | -2817 |
| Goldendale | 10:59:32 | -47.5 | Dark | Up | 39.8 | 264.9 | Up | 10:44:32 - 11:14:32 | -2860 |
| The Dalles | 10:59:33 | -47.8 | Dark | Up | 40.1 | 264.8 | Up | 10:44:33 - 11:14:33 | -2889 |
| Maupin | 10:59:31 | -47.8 | Dark | Up | 40.1 | 265.3 | Up | 10:44:31 - 11:14:31 | -2927 |
| Madras/Culver | 10:59:30 | -48.0 | Dark | Up | 40.1 | 265.7 | Up | 10:44:30 - 11:14:30 | -2980 |
| Niwot | 10:58:56 | -37.0 | Dark | Up | 28.3 | 279.1 | Low | 10:43:56 - 11:13:56 | -2981 |
| SwRI | 10:58:56 | -37.1 | Dark | Up | 28.3 | 279.1 | Low | 10:43:56 - 11:13:56 | -2994 |
| Redmond | 10:59:29 | -48.2 | Dark | Up | 40.2 | 265.9 | Up | 10:44:29 - 11:14:29 | -3016 |
| Sisters | 10:59:30 | -48.4 | Dark | Up | 40.5 | 265.6 | Up | 10:44:30 - 11:14:30 | -3023 |
| Bend | 10:59:29 | -48.3 | Dark | Up | 40.3 | 266.0 | Up | 10:44:29 - 11:14:29 | -3040 |
| Oregon Observatory | 10:59:29 | -48.4 | Dark | Up | 40.4 | 266.1 | Up | 10:44:29 - 11:14:29 | -3059 |
| La Pine/Gilchrist | 10:59:29 | -48.5 | Dark | Up | 40.5 | 266.2 | Up | 10:44:29 - 11:14:29 | -3081 |
| North Lake | 10:59:27 | -48.2 | Dark | Up | 40.1 | 267.0 | Up | 10:44:27 - 11:14:27 | -3109 |
| Paisley | 10:59:25 | -48.1 | Dark | Up | 39.9 | 267.7 | Up | 10:44:25 - 11:14:25 | -3154 |
| Chiloquin | 10:59:27 | -49.1 | Dark | Up | 40.8 | 266.9 | Up | 10:44:27 - 11:14:27 | -3197 |
| Lakeview | 10:59:23 | -48.1 | Dark | Up | 39.7 | 268.3 | Up | 10:44:23 - 11:14:23 | -3199 |
| Klamath Falls | 10:59:26 | -49.1 | Dark | Up | 40.8 | 267.2 | Up | 10:44:26 - 11:14:26 | -3229 |
| Tulelake | 10:59:25 | -48.9 | Dark | Up | 40.6 | 267.7 | Up | 10:44:25 - 11:14:25 | -3248 |
| Cedarville | 10:59:22 | -48.1 | Dark | Up | 39.6 | 268.9 | Up | 10:44:22 - 11:14:22 | -3259 |
| Fall River/Burney | 10:59:23 | -49.1 | Dark | Up | 40.5 | 268.5 | Up | 10:44:23 - 11:14:23 | -3336 |
| Susanville | 10:59:20 | -48.7 | Dark | Up | 40.0 | 269.5 | Up | 10:44:20 - 11:14:20 | -3380 |
| Gimple | 10:59:20 | -48.9 | Dark | Up | 40.2 | 269.6 | Up | 10:44:20 - 11:14:20 | -3413 |
| Greenville | 10:59:20 | -48.9 | Dark | Up | 40.2 | 269.6 | Up | 10:44:20 - 11:14:20 | -3415 |
| Quincy | 10:59:20 | -49.0 | Dark | Up | 40.2 | 269.7 | Up | 10:44:20 - 11:14:20 | -3435 |
| Portola | 10:59:19 | -48.6 | Dark | Up | 39.9 | 270.1 | Up | 10:44:19 - 11:14:19 | -3436 |
| Reno | 10:59:17 | -48.2 | Dark | Up | 39.4 | 270.8 | Up | 10:44:17 - 11:14:17 | -3446 |
| Carson City | 10:59:16 | -48.2 | Dark | Up | 39.4 | 271.1 | Up | 10:44:16 - 11:14:16 | -3481 |
| Yerington | 10:59:15 | -47.8 | Dark | Up | 38.9 | 271.6 | Up | 10:44:15 - 11:14:15 | -3484 |
| Gardnerville | 10:59:15 | -48.2 | Dark | Up | 39.3 | 271.3 | Up | 10:44:15 - 11:14:15 | -3504 |
| Hawthorne | 10:59:13 | -47.4 | Dark | Up | 38.4 | 272.3 | Up | 10:44:13 - 11:14:13 | -3517 |
| Tonopah | 10:59:09 | -46.4 | Dark | Up | 37.3 | 273.5 | Up | 10:44:09 - 11:14:09 | -3526 |
| Lee Vining | 10:59:13 | -47.9 | Dark | Up | 38.8 | 272.5 | Up | 10:44:13 - 11:14:13 | -3586 |
| Bishop | 10:59:10 | -47.4 | Dark | Up | 38.2 | 273.4 | Up | 10:44:10 - 11:14:10 | -3626 |
| Beatty | 10:59:06 | -46.1 | Dark | Up | 36.9 | 274.6 | Up | 10:44:06 - 11:14:06 | -3629 |
| Indian Springs | 10:59:04 | -45.3 | Dark | Up | 36.0 | 275.5 | Up | 10:44:04 - 11:14:04 | -3631 |
| Henderson | 10:59:02 | -44.7 | Dark | Up | 35.4 | 276.2 | Up | 10:44:02 - 11:14:02 | -3665 |
| Lone Pine | 10:59:08 | -47.2 | Dark | Up | 37.9 | 274.1 | Up | 10:44:08 - 11:14:08 | -3694 |
| Patrick | 10:58:58 | -43.8 | Dark | Up | 34.4 | 277.2 | Up | 10:43:58 - 11:13:58 | -3695 |
| DCO | 10:58:57 | -43.3 | Dark | Up | 33.8 | 277.8 | Up | 10:43:57 - 11:13:57 | -3705 |
| Searchlight/Boulder City | 10:59:00 | -44.7 | Dark | Up | 35.3 | 276.6 | Up | 10:44:00 - 11:14:00 | -3720 |
| Kingman/Dolan Springs | 10:58:58 | -44.0 | Dark | Up | 34.6 | 277.3 | Up | 10:43:58 - 11:13:58 | -3723 |
| Laughlin/Bullhead City | 10:58:59 | -44.4 | Dark | Up | 35.0 | 277.0 | Up | 10:43:59 - 11:13:59 | -3740 |
| Mohave Valley | 10:58:59 | -44.4 | Dark | Up | 34.9 | 277.2 | Up | 10:43:59 - 11:13:59 | -3767 |
| Lake Havasu City | 10:58:58 | -44.2 | Dark | Up | 34.7 | 277.6 | Up | 10:43:58 - 11:13:58 | -3800 |
| Parker | 10:58:57 | -44.2 | Dark | Up | 34.6 | 277.9 | Up | 10:43:57 - 11:13:57 | -3835 |
| CPSLO | 10:59:11 | -49.3 | Dark | Up | 39.9 | 273.8 | Up | 10:44:11 - 11:14:11 | -3894 |
| Blythe | 10:58:56 | -44.4 | Dark | Up | 34.8 | 278.1 | Up | 10:43:56 - 11:13:56 | -3896 |
| Idyllwild | 10:59:00 | -46.2 | Dark | Up | 36.5 | 277.0 | Up | 10:44:00 - 11:14:00 | -3946 |
| Wildwood | 10:59:05 | -47.7 | Dark | Up | 38.1 | 275.8 | Up | 10:44:05 - 11:14:05 | -3962 |
| Calipatria | 10:58:57 | -45.2 | Dark | Up | 35.5 | 278.0 | Up | 10:43:57 - 11:13:57 | -3974 |
| Yuma | 10:58:55 | -44.5 | Dark | Up | 34.7 | 278.7 | Up | 10:43:55 - 11:13:55 | -3991 |
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 98WV31, (2019/12/18 11:02UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 9.00 97 Alnath 05:26:17.5 +28:36:23 1.6 8.20 83 98 Tau 04:58:09.4 +25:03:00 5.8 1.02 90 PPM 093905 04:56:15.5 +24:35:32 7.0 0.39 91 PPM 093880 04:54:44.9 +24:05:46 11.3 0.24 91 98WV31 04:55:00.1 +24:19:38 15.0 91 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:02:23 UT
Marc W. Buie, Southwest Research Institute