RECON: TNO occultation with 127546

Event between (127546) 02XU93 and star GA1520:04858708 with event index number of 1293226

Geocentric closest approach at 2024/07/07 11:06:14 UTC

J2000 position of star is 16:02:19.1 +63:37:34
Equinox of date position of star is 16:02:36.8 +63:33:36
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 78 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 27.2 AU from the Sun and 27.2 AU from the Earth.
Apparent velocity is 31.1 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 219 seconds.
The 1-sigma cross-track error in the shadow position is 5573 km.
The sky-plane scale is 19752.8 km/arcsec.

The object has an absolute magnitude Hv=8.1
Diameter=151.4 km assuming a 5% albedo -- 4.8 sec chord
Diameter=61.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 127546, (2024/07/07 11:06UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:46.1 +38:48:27  0.0 33.74 112
Kochab         14:50:39.6 +74:03:19  2.1 12.23  69
PPM 019587     15:47:02.8 +62:31:28  5.2  2.05  77
PPM 019753     16:09:41.0 +63:20:39  6.8  0.82  79
PPM 019682     16:00:36.5 +63:41:16  9.6  0.26  78
127546         16:02:37.0 +63:33:33 15.7        79
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 4.1 sigma about the mid-time.
The median site spacing is 7.5 km RECON observability=0.4 and success probability=1.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	11:03:40	0.4	Sun up	Down	39.4	326.3	Up	10:48:40 - 11:18:40	1676
Kamloops	11:04:00	-7.0	NT	Down	43.5	322.2	Up	10:49:00 - 11:19:00	937
Kelowna	11:03:58	-7.3	NT	Down	42.5	323.0	Up	10:48:58 - 11:18:58	900
Peachland	11:03:58	-7.5	NT	Down	42.5	322.9	Up	10:48:58 - 11:18:58	879
Summerland	11:03:58	-7.6	NT	Down	42.4	323.1	Up	10:48:58 - 11:18:58	870
Penticton	11:03:58	-7.6	NT	Down	42.3	323.1	Up	10:48:58 - 11:18:58	868
Dunrhomin	11:03:27	-6.4	NT	Down	29.0	330.8	Low	10:48:27 - 11:18:27	867
Nikitin	11:03:27	-6.5	NT	Down	28.9	330.8	Low	10:48:27 - 11:18:27	853
CU-SBO	11:03:27	-6.6	NT	Down	28.9	330.8	Low	10:48:27 - 11:18:27	844
Oliver	11:03:57	-7.8	NT	Down	42.0	323.3	Up	10:48:57 - 11:18:57	838
Anarchist Mountain Observatory	11:03:57	-7.9	NT	Down	41.8	323.5	Up	10:48:57 - 11:18:57	830
Okanogan	11:03:57	-8.4	NT	Down	41.4	323.7	Up	10:48:57 - 11:18:57	767
Brewster	11:03:57	-8.7	NT	Down	41.2	323.8	Up	10:48:57 - 11:18:57	735
Manson/Chelan	11:03:58	-9.1	NT	Down	41.2	323.8	Up	10:48:58 - 11:18:58	703
Wenatchee	11:03:57	-9.5	NT	Down	40.9	324.0	Up	10:48:57 - 11:18:57	655
Victoria	11:04:04	-9.9	NT	Down	43.0	322.6	Up	10:49:04 - 11:19:04	636
Ellensburg	11:03:58	-9.9	NT	Down	40.6	324.2	Up	10:48:58 - 11:18:58	611
PNWRO	11:03:54	-9.9	NT	Down	39.2	325.1	Up	10:48:54 - 11:18:54	595
Yakima	11:03:58	-10.2	NT	Down	40.3	324.4	Up	10:48:58 - 11:18:58	576
Toppenish/White Swan	11:03:57	-10.3	NT	Down	40.1	324.5	Up	10:48:57 - 11:18:57	564
The Dalles	11:03:58	-11.3	NT	Down	39.7	324.7	Up	10:48:58 - 11:18:58	466
Maupin	11:03:58	-11.5	NT	Down	39.4	324.9	Up	10:48:58 - 11:18:58	435
Sisters	11:03:58	-12.4	AT	Down	38.8	325.2	Up	10:48:58 - 11:18:58	340
Bend	11:03:57	-12.5	AT	Down	38.5	325.4	Up	10:48:57 - 11:18:57	331
Oregon Observatory	11:03:58	-12.7	AT	Down	38.4	325.4	Up	10:48:58 - 11:18:58	311
Chiloquin	11:03:58	-13.9	AT	Down	37.5	325.9	Up	10:48:58 - 11:18:58	184
Cedarville	11:03:54	-13.8	AT	Down	36.0	326.7	Up	10:48:54 - 11:18:54	171
Klamath Falls	11:03:58	-14.1	AT	Down	37.2	326.1	Up	10:48:58 - 11:18:58	159
Fall River/Burney	11:03:56	-14.8	AT	Down	36.1	326.7	Up	10:48:56 - 11:18:56	79
Gimple	11:03:55	-15.2	AT	Down	35.1	327.1	Up	10:48:55 - 11:18:55	29
Reno	11:03:53	-15.1	AT	Down	34.2	327.5	Up	10:48:53 - 11:18:53	29
Greenville	11:03:55	-15.3	AT	Down	35.1	327.1	Up	10:48:55 - 11:18:55	25
Portola	11:03:54	-15.3	AT	Down	34.7	327.3	Up	10:48:54 - 11:18:54	20
Patrick	11:03:40	-14.7	AT	Down	28.2	330.0	Low	10:48:40 - 11:18:40	20
George/Scottsdale	11:03:36	-14.6	AT	Down	25.9	330.8	Low	10:48:36 - 11:18:36	17
Yerington	11:03:51	-15.2	AT	Down	33.4	327.9	Up	10:48:51 - 11:18:51	16
Quincy	11:03:55	-15.4	AT	Down	35.0	327.2	Up	10:48:55 - 11:18:55	9
Hawthorne	11:03:50	-15.3	AT	Down	32.8	328.1	Up	10:48:50 - 11:18:50	5
Carson City	11:03:53	-15.4	AT	Down	33.9	327.7	Up	10:48:53 - 11:18:53	1
Gardnerville	11:03:52	-15.5	AT	Down	33.6	327.8	Up	10:48:52 - 11:18:52	-16
Beatty	11:03:46	-15.4	AT	Down	30.7	329.0	Up	10:48:46 - 11:18:46	-26
Laughlin/Bullhead City	11:03:41	-15.3	AT	Down	28.3	329.9	Low	10:48:41 - 11:18:41	-36
Lee Vining	11:03:51	-15.9	AT	Down	32.5	328.2	Up	10:48:51 - 11:18:51	-63
Lake Havasu City	11:03:40	-15.6	AT	Down	27.6	330.2	Low	10:48:40 - 11:18:40	-70
Bishop	11:03:49	-16.0	AT	Down	31.7	328.6	Up	10:48:49 - 11:18:49	-73
Yuma	11:03:41	-17.0	AT	Down	26.2	330.6	Low	10:48:41 - 11:18:41	-213
Calipatria	11:03:43	-17.3	AT	Down	26.9	330.3	Low	10:48:43 - 11:18:43	-233
Idyllwild	11:03:45	-17.6	AT	Down	27.9	329.9	Low	10:48:45 - 11:18:45	-255
Wildwood	11:03:49	-18.4	Dark	Down	29.0	329.5	Low	10:48:49 - 11:18:49	-327

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 127546, (2024/07/07 11:06UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 33.74 112
Kochab         14:50:42.2 +74:09:20  2.1 12.23  69
PPM 019587     15:46:40.1 +62:35:57  5.2  2.05  77
PPM 019753     16:09:23.5 +63:24:27  6.8  0.82  79
PPM 019682     16:00:18.7 +63:45:20  9.6  0.26  78
127546         16:02:19.1 +63:37:34 15.7        78
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:29:37 UT

RECON