RECON: TNO occultation with 544977

Event between (544977) 14WZ535 and star GA0840:03782027 with event index number of 2251728

Geocentric closest approach at 2027/02/19 08:57:39 UTC

J2000 position of star is 09:23:50.0 -05:23:04
Equinox of date position of star is 09:25:01.8 -05:29:18
Stellar brightness G=10.1, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 27 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 42.2 AU from the Sun and 41.3 AU from the Earth.
Apparent velocity is 25.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 456 seconds.
The 1-sigma cross-track error in the shadow position is 4503 km.
The sky-plane scale is 29932.6 km/arcsec.

The object has an absolute magnitude Hv=6.2
Diameter=337.3 km assuming a 5% albedo -- 13.3 sec chord
Diameter=137.7 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 544977, (2027/02/19 08:58UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:48.9 +11:50:01  1.3 20.58  22
Alphard        09:28:55.3 -08:46:39  2.0  3.40  30
28 Hya         09:26:45.4 -05:14:09  5.6  0.47  26
PPM 192321     09:25:16.1 -05:28:45  7.5  0.03  26
544977         09:25:11.3 -05:30:08 10.1        27
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 2.0 sigma about the mid-time.
The median site spacing is 12.6 km RECON observability=1.0 and success probability=1.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	08:57:29	-44.5	Dark	Up	24.7	220.8	Low	08:42:29 - 09:12:29	11473
Kamloops	08:57:57	-49.7	Dark	Up	30.8	206.0	Up	08:42:57 - 09:12:57	11135
Kelowna	08:57:54	-50.3	Dark	Up	31.2	207.2	Up	08:42:54 - 09:12:54	11117
Peachland	08:57:54	-50.4	Dark	Up	31.4	206.9	Up	08:42:54 - 09:12:54	11105
Summerland	08:57:54	-50.6	Dark	Up	31.5	207.1	Up	08:42:54 - 09:12:54	11100
Penticton	08:57:54	-50.6	Dark	Up	31.5	207.2	Up	08:42:54 - 09:12:54	11099
Oliver	08:57:53	-50.9	Dark	Up	31.9	207.3	Up	08:42:53 - 09:12:53	11082
Anarchist Mountain Observatory	08:57:54	-51.1	Dark	Up	32.0	207.6	Up	08:42:54 - 09:12:54	11079
Okanogan	08:57:51	-51.7	Dark	Up	32.6	207.5	Up	08:42:51 - 09:12:51	11041
Brewster	08:57:52	-52.0	Dark	Up	32.9	207.4	Up	08:42:52 - 09:12:52	11023
Manson/Chelan	08:57:52	-52.3	Dark	Up	33.2	207.0	Up	08:42:52 - 09:12:52	11004
Wenatchee	08:57:51	-52.8	Dark	Up	33.7	207.0	Up	08:42:51 - 09:12:51	10976
Victoria	08:58:01	-52.2	Dark	Up	33.5	203.1	Up	08:43:01 - 09:13:01	10961
Ellensburg	08:57:52	-53.2	Dark	Up	34.1	206.8	Up	08:42:52 - 09:12:52	10949
PNWRO	08:57:44	-53.8	Dark	Up	34.5	209.0	Up	08:42:44 - 09:12:44	10936
Yakima	08:57:50	-53.6	Dark	Up	34.5	206.9	Up	08:42:50 - 09:12:50	10928
Dunrhomin	08:56:56	-53.3	Dark	Up	33.0	225.9	Up	08:41:56 - 09:11:56	10921
Toppenish/White Swan	08:57:50	-53.8	Dark	Up	34.6	207.2	Up	08:42:50 - 09:12:50	10920
Nikitin	08:56:55	-53.4	Dark	Up	33.1	225.9	Up	08:41:55 - 09:11:55	10910
CU-SBO	08:56:55	-53.5	Dark	Up	33.2	225.9	Up	08:41:55 - 09:11:55	10905
The Dalles	08:57:51	-54.7	Dark	Up	35.6	206.5	Up	08:42:51 - 09:12:51	10859
Maupin	08:57:49	-55.1	Dark	Up	35.9	206.8	Up	08:42:49 - 09:12:49	10838
Sisters	08:57:48	-56.0	Dark	Up	36.8	206.5	Up	08:42:48 - 09:12:48	10777
Bend	08:57:46	-56.2	Dark	Up	37.0	206.9	Up	08:42:46 - 09:12:46	10770
Oregon Observatory	08:57:47	-56.4	Dark	Up	37.2	206.8	Up	08:42:47 - 09:12:47	10757
Chiloquin	08:57:46	-57.7	Dark	Up	38.5	206.7	Up	08:42:46 - 09:12:46	10669
Klamath Falls	08:57:45	-58.1	Dark	Up	38.8	206.9	Up	08:42:45 - 09:12:45	10650
Cedarville	08:57:39	-58.3	Dark	Up	38.8	209.1	Up	08:42:39 - 09:12:39	10649
Fall River/Burney	08:57:42	-59.1	Dark	Up	39.7	207.8	Up	08:42:42 - 09:12:42	10588
Gimple	08:57:38	-59.8	Dark	Up	40.3	208.8	Up	08:42:38 - 09:12:38	10545
Greenville	08:57:38	-59.8	Dark	Up	40.3	208.7	Up	08:42:38 - 09:12:38	10543
Portola	08:57:36	-60.0	Dark	Up	40.4	209.4	Up	08:42:36 - 09:12:36	10535
Reno	08:57:33	-60.1	Dark	Up	40.4	210.3	Up	08:42:33 - 09:12:33	10535
Quincy	08:57:38	-60.0	Dark	Up	40.5	208.8	Up	08:42:38 - 09:12:38	10530
Yerington	08:57:30	-60.4	Dark	Up	40.6	211.3	Up	08:42:30 - 09:12:30	10517
Carson City	08:57:32	-60.4	Dark	Up	40.7	210.5	Up	08:42:32 - 09:12:32	10513
Hawthorne	08:57:28	-60.7	Dark	Up	40.8	212.2	Up	08:42:28 - 09:12:28	10501
Gardnerville	08:57:31	-60.6	Dark	Up	40.9	210.6	Up	08:42:31 - 09:12:31	10498
Lee Vining	08:57:28	-61.3	Dark	Up	41.5	211.8	Up	08:42:28 - 09:12:28	10451
Beatty	08:57:19	-61.4	Dark	Up	41.4	215.1	Up	08:42:19 - 09:12:19	10443
Bishop	08:57:25	-61.6	Dark	Up	41.7	213.0	Up	08:42:25 - 09:12:25	10431
Patrick	08:57:07	-61.4	Dark	Up	41.2	219.2	Up	08:42:07 - 09:12:07	10418
Laughlin/Bullhead City	08:57:09	-61.9	Dark	Up	41.7	218.5	Up	08:42:09 - 09:12:09	10382
George/Scottsdale	08:56:58	-61.7	Dark	Up	41.4	222.4	Up	08:41:58 - 09:11:58	10353
Lake Havasu City	08:57:06	-62.4	Dark	Up	42.1	219.2	Up	08:42:06 - 09:12:06	10343
Idyllwild	08:57:12	-64.1	Dark	Up	43.9	216.9	Up	08:42:12 - 09:12:12	10227
Calipatria	08:57:06	-64.1	Dark	Up	43.8	218.6	Up	08:42:06 - 09:12:06	10215
Yuma	08:57:05	-64.0	Dark	Up	43.7	219.9	Up	08:42:05 - 09:12:05	10208
Wildwood	08:57:18	-64.6	Dark	Up	44.5	214.4	Up	08:42:18 - 09:12:18	10200

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 544977, (2027/02/19 08:58UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 20.58  22
Alphard        09:27:35.2 -08:39:30  2.0  3.40  30
28 Hya         09:25:24.0 -05:07:03  5.6  0.47  26
PPM 192321     09:23:54.8 -05:21:41  7.5  0.03  26
544977         09:23:50.0 -05:23:04 10.1        27
Positions are for J2000

Event circumstances last updated at 2023/12/23 04:27:24 UT

RECON