Event between (523742) 14TZ85 and star UC4-604-042758 with event index number of 305951
Geocentric closest approach at 2020/02/12 09:14:14 UTC
J2000 position of star is 08:01:39.9 +30:39:06
Equinox of date position of star is 08:02:52.9 +30:35:48
Stellar brightness R=16.3,
use SENSEUP=128
Star is 69 degrees from the moon.
Moon is 87% illuminated.
TNO apparent brightness V=22.2
[RECON map]
TNO is 54.1 AU from the Sun
and 53.3 AU from the Earth.
The TNO is moving 23.9
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 198 seconds.
The 1-sigma cross-track error in the shadow position is
2802 km.
The sky-plane scale is
38621.7 km/arcsec.
The TNO has an absolute magnitude Hv=4.8
Diameter=660.7 km assuming a 5% albedo -- 27.7 sec chord
Diameter=269.7 km assuming a 30% albedo -- 11.3 sec chord
Dynamical classification is 7:4EII
Star training set for 523742, (2020/02/12 09:14UT) Object RA Dec mag sep mel Pollux 07:46:32.7 +27:58:34 1.1 4.43 72 15 Cnc 08:14:23.5 +29:35:41 5.6 2.67 67 PPM 098143 07:57:30.8 +29:47:51 8.1 1.42 70 PPM 073356 08:02:58.1 +31:06:55 9.7 0.52 69 PPM 073344 08:02:22.2 +30:11:59 10.5 0.41 69 523742 08:02:55.5 +30:35:41 16.3 69 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
4.6 sigma about the mid-time.
The median site spacing is 17.8 km
RECON observability=1.0 and success probability=9.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 09:12:32 | -51.8 | Dark | Up | 54.4 | 252.6 | Up | 08:57:32 - 09:27:32 | -2942 |
| Summerland | 09:12:32 | -52.2 | Dark | Up | 54.7 | 252.7 | Up | 08:57:32 - 09:27:32 | -2977 |
| Penticton | 09:12:32 | -52.2 | Dark | Up | 54.6 | 252.9 | Up | 08:57:32 - 09:27:32 | -2980 |
| Okanagan Falls | 09:12:32 | -52.4 | Dark | Up | 54.7 | 253.2 | Up | 08:57:32 - 09:27:32 | -2997 |
| Oliver | 09:12:31 | -52.5 | Dark | Up | 54.7 | 253.4 | Up | 08:57:31 - 09:27:31 | -3012 |
| Anarchist Mountain Observatory | 09:12:30 | -52.6 | Dark | Up | 54.6 | 253.8 | Up | 08:57:30 - 09:27:30 | -3022 |
| Oroville | 09:12:30 | -52.7 | Dark | Up | 54.7 | 253.8 | Up | 08:57:30 - 09:27:30 | -3031 |
| Tonasket | 09:12:30 | -52.9 | Dark | Up | 54.8 | 254.2 | Up | 08:57:30 - 09:27:30 | -3052 |
| Okanogan | 09:12:30 | -53.3 | Dark | Up | 55.0 | 254.5 | Up | 08:57:30 - 09:27:30 | -3087 |
| Brewster | 09:12:29 | -53.6 | Dark | Up | 55.2 | 254.6 | Up | 08:57:29 - 09:27:29 | -3118 |
| Manson/Chelan | 09:12:30 | -53.9 | Dark | Up | 55.5 | 254.6 | Up | 08:57:30 - 09:27:30 | -3147 |
| Entiat | 09:12:29 | -54.1 | Dark | Up | 55.6 | 254.8 | Up | 08:57:29 - 09:27:29 | -3170 |
| Wenatchee | 09:12:28 | -54.4 | Dark | Up | 55.7 | 255.1 | Up | 08:57:28 - 09:27:28 | -3196 |
| Ellensburg | 09:12:28 | -54.8 | Dark | Up | 55.9 | 255.4 | Up | 08:57:28 - 09:27:28 | -3241 |
| Pasco | 09:12:23 | -55.1 | Dark | Up | 55.2 | 257.8 | Up | 08:57:23 - 09:27:23 | -3269 |
| Yakima | 09:12:27 | -55.2 | Dark | Up | 56.1 | 256.0 | Up | 08:57:27 - 09:27:27 | -3279 |
| PNWRO | 09:12:22 | -55.2 | Dark | Up | 55.1 | 258.4 | Up | 08:57:22 - 09:27:22 | -3285 |
| Toppenish/White Swan | 09:12:26 | -55.3 | Dark | Up | 56.0 | 256.5 | Up | 08:57:26 - 09:27:26 | -3295 |
| George/Umatilla | 09:12:23 | -55.4 | Dark | Up | 55.4 | 258.1 | Up | 08:57:23 - 09:27:23 | -3306 |
| Niwot | 09:11:36 | -53.3 | Dark | Up | 45.5 | 275.4 | Up | 08:56:36 - 09:26:36 | -3351 |
| Goldendale | 09:12:26 | -56.0 | Dark | Up | 56.4 | 256.9 | Up | 08:57:26 - 09:27:26 | -3359 |
| SwRI | 09:11:37 | -53.5 | Dark | Up | 45.6 | 275.4 | Up | 08:56:37 - 09:26:37 | -3364 |
| The Dalles | 09:12:26 | -56.3 | Dark | Up | 56.7 | 256.8 | Up | 08:57:26 - 09:27:26 | -3391 |
| Maupin | 09:12:25 | -56.6 | Dark | Up | 56.7 | 257.6 | Up | 08:57:25 - 09:27:25 | -3428 |
| Madras/Culver | 09:12:24 | -57.1 | Dark | Up | 56.9 | 258.3 | Up | 08:57:24 - 09:27:24 | -3481 |
| Redmond | 09:12:23 | -57.5 | Dark | Up | 57.0 | 258.8 | Up | 08:57:23 - 09:27:23 | -3517 |
| Sisters | 09:12:25 | -57.6 | Dark | Up | 57.3 | 258.4 | Up | 08:57:25 - 09:27:25 | -3526 |
| Bend | 09:12:23 | -57.7 | Dark | Up | 57.1 | 259.0 | Up | 08:57:23 - 09:27:23 | -3541 |
| Oregon Observatory | 09:12:23 | -57.9 | Dark | Up | 57.3 | 259.2 | Up | 08:57:23 - 09:27:23 | -3562 |
| La Pine/Gilchrist | 09:12:23 | -58.1 | Dark | Up | 57.3 | 259.4 | Up | 08:57:23 - 09:27:23 | -3583 |
| North Lake | 09:12:20 | -58.3 | Dark | Up | 57.0 | 260.6 | Up | 08:57:20 - 09:27:20 | -3607 |
| Paisley | 09:12:18 | -58.7 | Dark | Up | 56.8 | 261.7 | Up | 08:57:18 - 09:27:18 | -3649 |
| Lakeview | 09:12:16 | -59.1 | Dark | Up | 56.8 | 262.7 | Up | 08:57:16 - 09:27:16 | -3692 |
| Chiloquin | 09:12:21 | -59.2 | Dark | Up | 57.8 | 260.8 | Up | 08:57:21 - 09:27:21 | -3702 |
| Klamath Falls | 09:12:20 | -59.5 | Dark | Up | 57.8 | 261.4 | Up | 08:57:20 - 09:27:20 | -3732 |
| Tulelake | 09:12:19 | -59.7 | Dark | Up | 57.6 | 262.1 | Up | 08:57:19 - 09:27:19 | -3749 |
| Cedarville | 09:12:15 | -59.6 | Dark | Up | 56.7 | 263.8 | Up | 08:57:15 - 09:27:15 | -3750 |
| Fall River/Burney | 09:12:17 | -60.5 | Dark | Up | 57.7 | 263.6 | Up | 08:57:17 - 09:27:17 | -3835 |
| Susanville | 09:12:13 | -60.8 | Dark | Up | 57.2 | 265.1 | Up | 08:57:13 - 09:27:13 | -3873 |
| Gimple | 09:12:13 | -61.1 | Dark | Up | 57.4 | 265.4 | Up | 08:57:13 - 09:27:13 | -3907 |
| Greenville | 09:12:14 | -61.1 | Dark | Up | 57.4 | 265.3 | Up | 08:57:14 - 09:27:14 | -3910 |
| Portola | 09:12:11 | -61.2 | Dark | Up | 57.1 | 266.2 | Up | 08:57:11 - 09:27:11 | -3926 |
| Quincy | 09:12:13 | -61.3 | Dark | Up | 57.4 | 265.7 | Up | 08:57:13 - 09:27:13 | -3929 |
| Reno | 09:12:09 | -61.2 | Dark | Up | 56.6 | 267.1 | Up | 08:57:09 - 09:27:09 | -3931 |
| Yerington | 09:12:06 | -61.4 | Dark | Up | 56.1 | 268.3 | Up | 08:57:06 - 09:27:06 | -3963 |
| Carson City | 09:12:08 | -61.5 | Dark | Up | 56.6 | 267.6 | Up | 08:57:08 - 09:27:08 | -3966 |
| Gardnerville | 09:12:08 | -61.7 | Dark | Up | 56.6 | 268.0 | Up | 08:57:08 - 09:27:08 | -3988 |
| Tonopah | 09:11:59 | -61.3 | Dark | Up | 54.6 | 270.9 | Up | 08:56:59 - 09:26:59 | -3988 |
| Hawthorne | 09:12:04 | -61.6 | Dark | Up | 55.7 | 269.3 | Up | 08:57:04 - 09:27:04 | -3991 |
| Lee Vining | 09:12:04 | -62.3 | Dark | Up | 56.1 | 269.9 | Up | 08:57:04 - 09:27:04 | -4063 |
| Indian Springs | 09:11:52 | -61.7 | Dark | Up | 53.4 | 273.8 | Up | 08:56:52 - 09:26:52 | -4078 |
| Beatty | 09:11:55 | -62.0 | Dark | Up | 54.3 | 272.8 | Up | 08:56:55 - 09:26:55 | -4085 |
| Bishop | 09:12:00 | -62.4 | Dark | Up | 55.6 | 271.2 | Up | 08:57:00 - 09:27:00 | -4097 |
| Henderson | 09:11:49 | -61.8 | Dark | Up | 52.8 | 274.8 | Up | 08:56:49 - 09:26:49 | -4105 |
| Patrick | 09:11:45 | -61.6 | Dark | Up | 51.8 | 276.2 | Up | 08:56:45 - 09:26:45 | -4124 |
| DCO | 09:11:43 | -61.4 | Dark | Up | 51.2 | 276.9 | Up | 08:56:43 - 09:26:43 | -4127 |
| Kingman/Dolan Springs | 09:11:45 | -61.9 | Dark | Up | 52.0 | 276.4 | Up | 08:56:45 - 09:26:45 | -4153 |
| Searchlight/Boulder City | 09:11:47 | -62.2 | Dark | Up | 52.7 | 275.6 | Up | 08:56:47 - 09:26:47 | -4158 |
| Lone Pine | 09:11:58 | -62.9 | Dark | Up | 55.3 | 272.5 | Up | 08:56:58 - 09:26:58 | -4160 |
| Laughlin/Bullhead City | 09:11:46 | -62.2 | Dark | Up | 52.4 | 276.2 | Up | 08:56:46 - 09:26:46 | -4174 |
| Mohave Valley | 09:11:46 | -62.4 | Dark | Up | 52.4 | 276.5 | Up | 08:56:46 - 09:26:46 | -4201 |
| Lake Havasu City | 09:11:44 | -62.5 | Dark | Up | 52.1 | 277.1 | Up | 08:56:44 - 09:26:44 | -4230 |
| Parker | 09:11:43 | -62.7 | Dark | Up | 52.1 | 277.6 | Up | 08:56:43 - 09:26:43 | -4264 |
| Blythe | 09:11:43 | -63.3 | Dark | Up | 52.2 | 278.1 | Up | 08:56:43 - 09:26:43 | -4327 |
| CPSLO | 09:12:03 | -65.2 | Dark | Up | 57.3 | 273.0 | Up | 08:57:03 - 09:27:03 | -4379 |
| Idyllwild | 09:11:49 | -64.4 | Dark | Up | 54.0 | 277.1 | Up | 08:56:49 - 09:26:49 | -4395 |
| Calipatria | 09:11:44 | -64.2 | Dark | Up | 52.9 | 278.4 | Up | 08:56:44 - 09:26:44 | -4411 |
| Yuma | 09:11:41 | -63.9 | Dark | Up | 52.1 | 279.3 | Up | 08:56:41 - 09:26:41 | -4419 |
| Wildwood | 09:11:55 | -65.2 | Dark | Up | 55.5 | 275.8 | Up | 08:56:55 - 09:26:55 | -4428 |
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 523742, (2020/02/12 09:14UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 4.43 72 15 Cnc 08:13:08.9 +29:39:23 5.6 2.67 67 PPM 098143 07:56:15.5 +29:51:08 8.1 1.42 70 PPM 073356 08:01:42.3 +31:10:20 9.7 0.52 69 PPM 073344 08:01:06.8 +30:15:24 10.5 0.41 69 523742 08:01:39.9 +30:39:06 16.3 69 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:15:40 UT
Marc W. Buie, Southwest Research Institute