RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0720:23217982 with event index number of 2286376

Geocentric closest approach at 2027/08/20 04:32:23 UTC

J2000 position of star is 18:29:38.0 -16:58:03
Equinox of date position of star is 18:31:03.1 -16:56:58
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 81 degrees from the moon. Moon is 92% illuminated.
Apparent brightness V=20.3

[RECON map]
Object is 11.3 AU from the Sun and 10.7 AU from the Earth.
Apparent velocity is 10.4 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 105 seconds.
The 1-sigma cross-track error in the shadow position is 603 km.
The sky-plane scale is 7729.6 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 7.3 sec chord
Diameter=28.9 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2027/08/20 04:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.4 -26:29:27  0.9 29.40 109
Nunki          18:56:58.6 -26:15:35  2.0 11.06  77
PPM 234652     18:33:03.4 -18:22:52  5.0  1.50  81
PPM 234563     18:29:23.7 -16:24:29  8.4  0.70  82
PPM 234613     18:31:26.7 -16:41:40  9.4  0.26  81
459865         18:31:14.1 -16:56:50 14.9        81
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 5.0 sigma about the mid-time.
The median site spacing is 23.0 km RECON observability=0.6 and success probability=0.0%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	04:31:19	-17.2	AT	Up	20.1	193.0	Low	04:22:06 - 04:40:32	6513
Kamloops	04:32:50	-11.8	NT	Up	22.4	178.7	Low	04:23:37 - 04:42:03	6451
Kelowna	04:32:44	-12.7	AT	Up	23.2	179.6	Low	04:23:31 - 04:41:57	6419
Peachland	04:32:46	-12.6	AT	Up	23.3	179.3	Low	04:23:33 - 04:41:59	6413
Summerland	04:32:45	-12.8	AT	Up	23.4	179.4	Low	04:23:32 - 04:41:58	6407
Penticton	04:32:45	-12.9	AT	Up	23.5	179.5	Low	04:23:32 - 04:41:58	6404
Oliver	04:32:45	-13.1	AT	Up	23.8	179.5	Low	04:23:32 - 04:41:58	6388
Anarchist Mountain Observatory	04:32:44	-13.3	AT	Up	24.0	179.7	Low	04:23:31 - 04:41:57	6382
Okanogan	04:32:45	-13.6	AT	Up	24.7	179.5	Low	04:23:32 - 04:41:58	6351
Victoria	04:33:11	-11.5	NT	Up	24.4	175.6	Low	04:23:58 - 04:42:24	6346
Brewster	04:32:46	-13.6	AT	Up	24.9	179.3	Low	04:23:33 - 04:41:59	6337
Manson/Chelan	04:32:49	-13.6	AT	Up	25.1	178.9	Low	04:23:36 - 04:42:02	6327
Wenatchee	04:32:50	-13.8	AT	Up	25.6	178.7	Low	04:23:37 - 04:42:03	6304
Ellensburg	04:32:52	-13.9	AT	Up	26.0	178.5	Low	04:23:39 - 04:42:05	6283
Yakima	04:32:52	-14.1	AT	Up	26.4	178.4	Low	04:23:39 - 04:42:05	6263
Toppenish/White Swan	04:32:51	-14.3	AT	Up	26.6	178.6	Low	04:23:38 - 04:42:04	6252
PNWRO	04:32:40	-15.4	AT	Up	27.0	180.2	Low	04:23:27 - 04:41:53	6238
The Dalles	04:32:57	-14.4	AT	Up	27.4	177.8	Low	04:23:44 - 04:42:10	6210
Maupin	04:32:56	-14.7	AT	Up	27.8	177.9	Low	04:23:43 - 04:42:09	6189
Sisters	04:32:59	-14.9	AT	Up	28.7	177.3	Low	04:23:46 - 04:42:12	6142
Bend	04:32:57	-15.2	AT	Up	28.9	177.6	Low	04:23:44 - 04:42:10	6130
Oregon Observatory	04:32:59	-15.2	AT	Up	29.1	177.5	Low	04:23:46 - 04:42:12	6120
Chiloquin	04:33:02	-15.7	AT	Up	30.4	177.0	Up	04:23:49 - 04:42:15	6046
Klamath Falls	04:33:01	-16.0	AT	Up	30.8	177.1	Up	04:23:48 - 04:42:14	6027
Cedarville	04:32:49	-17.3	AT	Up	31.5	178.8	Up	04:23:36 - 04:42:02	5992
Fall River/Burney	04:32:59	-16.9	AT	Up	31.9	177.4	Up	04:23:46 - 04:42:12	5959
Dunrhomin	04:30:53	-26.4	Dark	Up	31.4	195.1	Up	04:21:40 - 04:40:06	5918
Gimple	04:32:55	-17.7	AT	Up	32.9	178.0	Up	04:23:42 - 04:42:08	5907
Greenville	04:32:55	-17.6	AT	Up	32.9	177.9	Up	04:23:42 - 04:42:08	5907
Nikitin	04:30:53	-26.5	Dark	Up	31.6	195.1	Up	04:21:40 - 04:40:06	5907
CU-SBO	04:30:53	-26.5	Dark	Up	31.7	195.0	Up	04:21:40 - 04:40:06	5903
Quincy	04:32:55	-17.8	AT	Up	33.1	177.9	Up	04:23:42 - 04:42:08	5895
Portola	04:32:51	-18.1	Dark	Up	33.2	178.4	Up	04:23:38 - 04:42:04	5889
Reno	04:32:46	-18.7	Dark	Up	33.5	179.2	Up	04:23:33 - 04:41:59	5875
Carson City	04:32:46	-18.9	Dark	Up	33.8	179.2	Up	04:23:33 - 04:41:59	5853
Yerington	04:32:41	-19.4	Dark	Up	34.0	179.9	Up	04:23:28 - 04:41:54	5842
Gardnerville	04:32:46	-19.1	Dark	Up	34.1	179.2	Up	04:23:33 - 04:41:59	5838
Hawthorne	04:32:37	-20.0	Dark	Up	34.5	180.5	Up	04:23:24 - 04:41:50	5815
Lee Vining	04:32:40	-20.0	Dark	Up	35.1	179.9	Up	04:23:27 - 04:41:53	5778
Bishop	04:32:34	-20.8	Dark	Up	35.7	180.7	Up	04:23:21 - 04:41:47	5741
Beatty	04:32:21	-22.1	Dark	Up	36.1	182.6	Up	04:23:08 - 04:41:34	5714
Patrick	04:31:57	-24.8	Dark	Up	37.4	186.0	Up	04:22:44 - 04:41:10	5619
Laughlin/Bullhead City	04:32:02	-24.5	Dark	Up	37.7	185.2	Up	04:22:49 - 04:41:15	5601
Lake Havasu City	04:32:00	-25.1	Dark	Up	38.4	185.6	Up	04:22:47 - 04:41:13	5555
Wildwood	04:32:37	-22.6	Dark	Up	38.9	180.5	Up	04:23:24 - 04:41:50	5520
George/Scottsdale	04:31:39	-27.1	Dark	Up	38.9	188.5	Up	04:22:26 - 04:40:52	5502
Idyllwild	04:32:19	-24.0	Dark	Up	39.3	182.8	Up	04:23:06 - 04:41:32	5500
Calipatria	04:32:09	-25.1	Dark	Up	39.8	184.2	Up	04:22:56 - 04:41:22	5458
Yuma	04:32:02	-26.0	Dark	Up	40.2	185.3	Up	04:22:49 - 04:41:15	5428

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 459865, (2027/08/20 04:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.40 109
Nunki          18:55:15.9 -26:17:49  2.0 11.06  77
PPM 234652     18:31:26.3 -18:24:10  5.0  1.50  81
PPM 234563     18:27:47.9 -16:25:38  8.4  0.70  82
PPM 234613     18:29:50.8 -16:42:53  9.4  0.26  81
459865         18:29:38.0 -16:58:03 14.9        81
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:09 UT

RECON