Event between (19521) Chaos and star GA1200:01984423 with event index number of 1162572
Geocentric closest approach at 2022/01/03 03:20:16 UTC
J2000 position of star is 05:50:23.2 +31:07:39
Equinox of date position of star is 05:51:38.7 +31:07:54
Stellar brightness G=15.1,
use SENSEUP=128
Star is 160 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=20.9
[RECON map]
TNO is 41.2 AU from the Sun
and 40.3 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 732 seconds.
The 1-sigma cross-track error in the shadow position is
4560 km.
The sky-plane scale is
29193.6 km/arcsec.
The TNO has an absolute magnitude Hv=4.8
Diameter=660.7 km assuming a 5% albedo -- 26.9 sec chord
Diameter=269.7 km assuming a 30% albedo -- 11.0 sec chord
Dynamical classification is CLASSICAL
Star training set for 19521, (2022/01/03 03:20UT) Object RA Dec mag sep mel Aldebaran 04:37:11.2 +16:33:07 0.8 22.38 141 Alnath 05:27:41.1 +28:37:27 1.6 5.80 155 PPM 071002 05:56:24.8 +31:42:10 5.9 1.14 161 PPM 070907 05:51:54.2 +31:04:11 8.3 0.07 160 19521 05:51:48.6 +31:07:56 15.1 160 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
1.2 sigma about the mid-time.
The median site spacing is 19.6 km
RECON observability=1.0 and success probability=5.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 03:22:30 | -30.1 | Dark | Down | 46.3 | 94.6 | Up | 03:07:30 - 03:37:30 | 8307 |
| Summerland | 03:22:32 | -29.9 | Dark | Down | 46.1 | 94.1 | Up | 03:07:32 - 03:37:32 | 8291 |
| Penticton | 03:22:32 | -30.0 | Dark | Down | 46.2 | 94.1 | Up | 03:07:32 - 03:37:32 | 8281 |
| Okanagan Falls | 03:22:32 | -30.0 | Dark | Down | 46.2 | 93.9 | Up | 03:07:32 - 03:37:32 | 8266 |
| Oliver | 03:22:32 | -30.0 | Dark | Down | 46.2 | 93.7 | Up | 03:07:32 - 03:37:32 | 8251 |
| Anarchist Mountain Observatory | 03:22:32 | -30.1 | Dark | Down | 46.3 | 93.7 | Up | 03:07:32 - 03:37:32 | 8230 |
| Oroville | 03:22:33 | -30.1 | Dark | Down | 46.3 | 93.6 | Up | 03:07:33 - 03:37:33 | 8226 |
| Tonasket | 03:22:33 | -30.1 | Dark | Down | 46.3 | 93.3 | Up | 03:07:33 - 03:37:33 | 8205 |
| Okanogan | 03:22:35 | -30.0 | Dark | Down | 46.2 | 92.9 | Up | 03:07:35 - 03:37:35 | 8181 |
| Brewster | 03:22:36 | -29.8 | Dark | Down | 46.1 | 92.4 | Up | 03:07:36 - 03:37:36 | 8164 |
| Manson/Chelan | 03:22:38 | -29.6 | Dark | Down | 45.9 | 91.9 | Up | 03:07:38 - 03:37:38 | 8157 |
| Entiat | 03:22:38 | -29.5 | Dark | Down | 45.9 | 91.6 | Up | 03:07:38 - 03:37:38 | 8140 |
| Wenatchee | 03:22:39 | -29.4 | Dark | Down | 45.8 | 91.3 | Up | 03:07:39 - 03:37:39 | 8121 |
| Ellensburg | 03:22:40 | -29.3 | Dark | Down | 45.7 | 90.7 | Up | 03:07:40 - 03:37:40 | 8092 |
| Yakima | 03:22:42 | -29.2 | Dark | Down | 45.7 | 90.3 | Up | 03:07:42 - 03:37:42 | 8057 |
| Toppenish/White Swan | 03:22:42 | -29.3 | Dark | Down | 45.8 | 90.2 | Up | 03:07:42 - 03:37:42 | 8032 |
| Goldendale | 03:22:45 | -29.0 | Dark | Down | 45.5 | 89.3 | Up | 03:07:45 - 03:37:45 | 7998 |
| The Dalles | 03:22:45 | -28.8 | Dark | Down | 45.2 | 88.9 | Up | 03:07:45 - 03:37:45 | 7990 |
| Pasco | 03:22:39 | -30.2 | Dark | Down | 46.6 | 91.0 | Up | 03:07:39 - 03:37:39 | 7980 |
| George/Umatilla | 03:22:42 | -30.0 | Dark | Down | 46.5 | 90.5 | Up | 03:07:42 - 03:37:42 | 7957 |
| PNWRO | 03:22:40 | -30.4 | Dark | Down | 46.8 | 90.9 | Up | 03:07:40 - 03:37:40 | 7950 |
| Maupin | 03:22:46 | -28.8 | Dark | Down | 45.3 | 88.5 | Up | 03:07:46 - 03:37:46 | 7950 |
| Madras/Culver | 03:22:48 | -28.7 | Dark | Down | 45.2 | 87.9 | Up | 03:07:48 - 03:37:48 | 7902 |
| Sisters | 03:22:50 | -28.4 | Dark | Down | 44.9 | 87.3 | Up | 03:07:50 - 03:37:50 | 7888 |
| Redmond | 03:22:49 | -28.7 | Dark | Down | 45.2 | 87.5 | Up | 03:07:49 - 03:37:49 | 7872 |
| Bend | 03:22:49 | -28.6 | Dark | Down | 45.1 | 87.2 | Up | 03:07:49 - 03:37:49 | 7858 |
| Oregon Observatory | 03:22:51 | -28.4 | Dark | Down | 45.0 | 87.0 | Up | 03:07:51 - 03:37:51 | 7847 |
| La Pine/Gilchrist | 03:22:51 | -28.4 | Dark | Down | 44.9 | 86.7 | Up | 03:07:51 - 03:37:51 | 7831 |
| North Lake | 03:22:51 | -28.8 | Dark | Down | 45.4 | 86.7 | Up | 03:07:51 - 03:37:51 | 7770 |
| Chiloquin | 03:22:55 | -28.0 | Dark | Down | 44.6 | 85.4 | Up | 03:07:55 - 03:37:55 | 7743 |
| Klamath Falls | 03:22:55 | -28.1 | Dark | Down | 44.6 | 85.1 | Up | 03:07:55 - 03:37:55 | 7709 |
| Paisley | 03:22:52 | -29.0 | Dark | Down | 45.6 | 86.4 | Up | 03:07:52 - 03:37:52 | 7707 |
| Tulelake | 03:22:56 | -28.2 | Dark | Down | 44.8 | 85.1 | Up | 03:07:56 - 03:37:56 | 7674 |
| Lakeview | 03:22:53 | -29.1 | Dark | Down | 45.7 | 86.0 | Up | 03:07:53 - 03:37:53 | 7654 |
| Fall River/Burney | 03:22:58 | -28.2 | Dark | Down | 44.8 | 84.2 | Up | 03:07:58 - 03:37:58 | 7587 |
| Cedarville | 03:22:54 | -29.2 | Dark | Down | 45.8 | 85.4 | Up | 03:07:54 - 03:37:54 | 7587 |
| Susanville | 03:22:58 | -28.7 | Dark | Down | 45.3 | 84.0 | Up | 03:07:58 - 03:37:58 | 7502 |
| Greenville | 03:22:59 | -28.4 | Dark | Down | 45.1 | 83.6 | Up | 03:07:59 - 03:37:59 | 7487 |
| Gimple | 03:22:59 | -28.5 | Dark | Down | 45.1 | 83.6 | Up | 03:07:59 - 03:37:59 | 7484 |
| Quincy | 03:23:00 | -28.4 | Dark | Down | 45.1 | 83.4 | Up | 03:08:00 - 03:38:00 | 7468 |
| Portola | 03:22:59 | -28.8 | Dark | Down | 45.4 | 83.5 | Up | 03:07:59 - 03:37:59 | 7439 |
| Reno | 03:22:59 | -29.2 | Dark | Down | 45.9 | 83.6 | Up | 03:07:59 - 03:37:59 | 7390 |
| Carson City | 03:22:59 | -29.2 | Dark | Down | 45.8 | 83.2 | Up | 03:07:59 - 03:37:59 | 7356 |
| Gardnerville | 03:23:00 | -29.2 | Dark | Down | 45.9 | 83.0 | Up | 03:08:00 - 03:38:00 | 7331 |
| Yerington | 03:22:58 | -29.7 | Dark | Down | 46.3 | 83.4 | Up | 03:07:58 - 03:37:58 | 7314 |
| Hawthorne | 03:22:58 | -30.0 | Dark | Down | 46.7 | 83.2 | Up | 03:07:58 - 03:37:58 | 7250 |
| Lee Vining | 03:23:01 | -29.6 | Dark | Down | 46.2 | 82.3 | Up | 03:08:01 - 03:38:01 | 7215 |
| Tonopah | 03:22:57 | -31.1 | Dark | Down | 47.7 | 83.4 | Up | 03:07:57 - 03:37:57 | 7153 |
| Bishop | 03:23:01 | -30.1 | Dark | Down | 46.7 | 82.1 | Up | 03:08:01 - 03:38:01 | 7131 |
| Lone Pine | 03:23:01 | -30.3 | Dark | Down | 46.9 | 81.4 | Up | 03:08:01 - 03:38:01 | 7045 |
| Beatty | 03:22:58 | -31.3 | Dark | Down | 47.9 | 82.4 | Up | 03:07:58 - 03:37:58 | 7025 |
| CPSLO | 03:23:10 | -28.0 | Dark | Down | 44.6 | 79.0 | Up | 03:08:10 - 03:38:10 | 7021 |
| Niwot | 03:22:24 | -40.4 | Dark | Down | 57.0 | 93.2 | Up | 03:07:24 - 03:37:24 | 6956 |
| Indian Springs | 03:22:56 | -32.1 | Dark | Down | 48.7 | 82.5 | Up | 03:07:56 - 03:37:56 | 6954 |
| SwRI | 03:22:23 | -40.3 | Dark | Down | 56.9 | 93.0 | Up | 03:07:23 - 03:37:23 | 6949 |
| Henderson | 03:22:56 | -32.6 | Dark | Down | 49.2 | 82.2 | Up | 03:07:56 - 03:37:56 | 6876 |
| Wildwood | 03:23:08 | -29.5 | Dark | Down | 46.0 | 78.6 | Up | 03:08:08 - 03:38:08 | 6823 |
| Searchlight/Boulder City | 03:22:57 | -32.6 | Dark | Down | 49.2 | 81.6 | Up | 03:07:57 - 03:37:57 | 6818 |
| Laughlin/Bullhead City | 03:22:57 | -32.9 | Dark | Down | 49.4 | 81.4 | Up | 03:07:57 - 03:37:57 | 6776 |
| Patrick | 03:22:54 | -33.5 | Dark | Down | 50.0 | 82.0 | Up | 03:07:54 - 03:37:54 | 6774 |
| Kingman/Dolan Springs | 03:22:55 | -33.3 | Dark | Down | 49.9 | 81.7 | Up | 03:07:55 - 03:37:55 | 6759 |
| Mohave Valley | 03:22:57 | -32.9 | Dark | Down | 49.4 | 81.1 | Up | 03:07:57 - 03:37:57 | 6749 |
| DCO | 03:22:53 | -34.0 | Dark | Down | 50.6 | 81.9 | Up | 03:07:53 - 03:37:53 | 6718 |
| Idyllwild | 03:23:05 | -31.0 | Dark | Down | 47.5 | 79.0 | Up | 03:08:05 - 03:38:05 | 6715 |
| Lake Havasu City | 03:22:57 | -33.0 | Dark | Down | 49.5 | 80.7 | Up | 03:07:57 - 03:37:57 | 6700 |
| Parker | 03:22:57 | -33.0 | Dark | Down | 49.5 | 80.3 | Up | 03:07:57 - 03:37:57 | 6664 |
| Blythe | 03:23:00 | -32.7 | Dark | Down | 49.2 | 79.6 | Up | 03:08:00 - 03:38:00 | 6623 |
| Calipatria | 03:23:03 | -31.9 | Dark | Down | 48.3 | 78.7 | Up | 03:08:03 - 03:38:03 | 6610 |
| Yuma | 03:23:02 | -32.6 | Dark | Down | 49.0 | 78.6 | Up | 03:08:02 - 03:38:02 | 6533 |
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 19521, (2022/01/03 03:20UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 22.38 141 Alnath 05:26:17.5 +28:36:23 1.6 5.80 155 PPM 071002 05:54:58.9 +31:42:02 5.9 1.14 161 PPM 070907 05:50:28.9 +31:03:54 8.3 0.07 160 19521 05:50:23.2 +31:07:39 15.1 160 Positions are for J2000
Event circumstances last updated at 2019/06/08 02:53:43 UT
Marc W. Buie, Southwest Research Institute