RECON: TNO occultation with 50000

Event between (50000) Quaoar and star GA0740:24057520 with event index number of 2327788

Geocentric closest approach at 2027/07/25 06:32:31 UTC

J2000 position of star is 18:50:08.1 -14:45:04
Equinox of date position of star is 18:51:30.8 -14:43:17
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 65% illuminated.
Apparent brightness V=18.7

[RECON map]
Object is 42.6 AU from the Sun and 41.6 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 115 seconds.
The 1-sigma cross-track error in the shadow position is 1589 km.
The sky-plane scale is 30192.0 km/arcsec.

The object has an absolute magnitude Hv=2.4
Diameter=1905.5 km assuming a 5% albedo -- 85.8 sec chord
Diameter=777.9 km assuming a 30% albedo -- 35.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 50000, (2027/07/25 06:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.1 -26:29:26  0.9 34.80 126
Nunki          18:56:58.3 -26:15:35  2.0 11.61  93
PPM 235105     18:52:04.6 -13:32:18  6.5  1.18  92
PPM 235132     18:52:57.8 -14:38:57  8.4  0.31  92
50000          18:51:42.3 -14:43:02 15.9        92
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 18.0 km RECON observability=1.0 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)
Kamloops	06:32:01	-16.5	AT	Up	24.5	177.7	Low	06:21:56 - 06:42:07	8225
Kelowna	06:31:59	-17.5	AT	Up	25.4	178.7	Low	06:21:53 - 06:42:04	8178
Peachland	06:32:00	-17.5	AT	Up	25.5	178.3	Low	06:21:54 - 06:42:05	8176
Summerland	06:31:59	-17.7	AT	Up	25.6	178.4	Low	06:21:54 - 06:42:05	8168
Penticton	06:31:59	-17.8	AT	Up	25.7	178.6	Low	06:21:54 - 06:42:05	8164
Victoria	06:32:11	-17.7	AT	Up	26.6	174.4	Low	06:22:06 - 06:42:17	8153
Oliver	06:31:59	-18.1	Dark	Up	26.1	178.5	Low	06:21:54 - 06:42:05	8147
Anarchist Mountain Observatory	06:31:58	-18.3	Dark	Up	26.2	178.8	Low	06:21:53 - 06:42:04	8137
Sleaford	06:31:19	-17.7	AT	Up	22.3	192.7	Low	06:21:13 - 06:41:24	8119
Okanogan	06:32:00	-18.9	Dark	Up	26.9	178.5	Low	06:21:54 - 06:42:05	8108
Brewster	06:32:00	-19.0	Dark	Up	27.1	178.3	Low	06:21:55 - 06:42:06	8096
Manson/Chelan	06:32:03	-19.1	Dark	Up	27.3	177.9	Low	06:21:57 - 06:42:08	8090
Wenatchee	06:32:03	-19.5	Dark	Up	27.8	177.7	Low	06:21:57 - 06:42:08	8067
Ellensburg	06:32:04	-19.8	Dark	Up	28.2	177.5	Low	06:21:59 - 06:42:10	8049
Yakima	06:32:03	-20.2	Dark	Up	28.6	177.4	Low	06:21:57 - 06:42:08	8028
Toppenish/White Swan	06:32:03	-20.5	Dark	Up	28.8	177.6	Low	06:21:57 - 06:42:08	8015
The Dalles	06:32:06	-20.9	Dark	Up	29.6	176.7	Low	06:22:01 - 06:42:12	7982
PNWRO	06:31:59	-21.2	Dark	Up	29.2	179.2	Low	06:21:53 - 06:42:04	7979
Maupin	06:32:06	-21.4	Dark	Up	30.0	176.8	Up	06:22:01 - 06:42:12	7958
Sisters	06:32:08	-22.0	Dark	Up	30.9	176.2	Up	06:22:03 - 06:42:14	7915
Bend	06:32:07	-22.3	Dark	Up	31.1	176.5	Up	06:22:02 - 06:42:13	7899
Oregon Observatory	06:32:09	-22.4	Dark	Up	31.3	176.4	Up	06:22:03 - 06:42:14	7891
Chiloquin	06:32:10	-23.5	Dark	Up	32.6	175.9	Up	06:22:05 - 06:42:16	7820
Klamath Falls	06:32:10	-23.8	Dark	Up	32.9	175.9	Up	06:22:05 - 06:42:16	7798
Cedarville	06:32:05	-24.9	Dark	Up	33.7	177.7	Up	06:22:00 - 06:42:11	7739
Fall River/Burney	06:32:10	-25.0	Dark	Up	34.1	176.3	Up	06:22:04 - 06:42:15	7723
Greenville	06:32:08	-25.9	Dark	Up	35.1	176.8	Up	06:22:03 - 06:42:14	7662
Gimple	06:32:09	-26.0	Dark	Up	35.1	176.9	Up	06:22:03 - 06:42:14	7661
Quincy	06:32:08	-26.1	Dark	Up	35.3	176.8	Up	06:22:03 - 06:42:14	7649
Portola	06:32:08	-26.4	Dark	Up	35.4	177.4	Up	06:22:03 - 06:42:14	7636
Reno	06:32:05	-26.9	Dark	Up	35.7	178.1	Up	06:21:59 - 06:42:10	7611
Carson City	06:32:05	-27.2	Dark	Up	36.0	178.1	Up	06:22:00 - 06:42:11	7588
Gardnerville	06:32:05	-27.4	Dark	Up	36.3	178.2	Up	06:21:59 - 06:42:10	7572
Yerington	06:32:03	-27.6	Dark	Up	36.3	178.9	Up	06:21:57 - 06:42:08	7567
Hawthorne	06:32:01	-28.2	Dark	Up	36.7	179.5	Up	06:21:56 - 06:42:07	7530
Lee Vining	06:32:03	-28.5	Dark	Up	37.3	178.9	Up	06:21:58 - 06:42:09	7500
Bishop	06:32:00	-29.3	Dark	Up	37.9	179.8	Up	06:21:55 - 06:42:06	7450
Dunrhomin	06:31:13	-29.5	Dark	Up	33.7	195.0	Up	06:21:07 - 06:41:18	7442
Nikitin	06:31:12	-29.7	Dark	Up	33.9	195.0	Up	06:21:07 - 06:41:18	7430
CU-SBO	06:31:13	-29.7	Dark	Up	34.0	194.9	Up	06:21:08 - 06:41:19	7428
Beatty	06:31:54	-30.2	Dark	Up	38.3	181.8	Up	06:21:49 - 06:42:00	7397
Patrick	06:31:45	-32.4	Dark	Up	39.7	185.4	Up	06:21:39 - 06:41:50	7251
Laughlin/Bullhead City	06:31:46	-32.5	Dark	Up	40.0	184.5	Up	06:21:41 - 06:41:52	7244
Wildwood	06:32:04	-32.2	Dark	Up	41.2	179.5	Up	06:21:58 - 06:42:09	7224
Lake Havasu City	06:31:46	-33.2	Dark	Up	40.6	184.9	Up	06:21:41 - 06:41:52	7192
Idyllwild	06:31:56	-33.2	Dark	Up	41.5	181.9	Up	06:21:50 - 06:42:01	7173
Calipatria	06:31:52	-34.1	Dark	Up	42.1	183.5	Up	06:21:47 - 06:41:58	7109
George/Scottsdale	06:31:37	-34.6	Dark	Up	41.2	188.1	Up	06:21:32 - 06:41:43	7096
Yuma	06:31:49	-34.8	Dark	Up	42.4	184.6	Up	06:21:43 - 06:41:54	7064

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 50000, (2027/07/25 06:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.80 126
Nunki          18:55:15.9 -26:17:49  2.0 11.61  93
PPM 235105     18:50:31.2 -13:34:20  6.5  1.18  92
PPM 235132     18:51:23.7 -14:41:02  8.4  0.31  92
50000          18:50:08.1 -14:45:04 15.9        92
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:28:54 UT

RECON