RECON: TNO occultation with 78799

Event between (78799) 02XW93 and star GA1240:02911456 with event index number of 2436694

Geocentric closest approach at 2027/12/01 07:59:13 UTC

J2000 position of star is 06:51:57.9 +34:46:08
Equinox of date position of star is 06:53:34.0 +34:44:17
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 169 degrees from the moon. Moon is 10% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 46.4 AU from the Sun and 45.6 AU from the Earth.
Apparent velocity is 22.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 274 seconds.
The 1-sigma cross-track error in the shadow position is 3000 km.
The sky-plane scale is 33070.4 km/arcsec.

The object has an absolute magnitude Hv=4.9
Diameter=605.4 km assuming a 5% albedo -- 28.4 sec chord
Diameter=247.1 km assuming a 30% albedo -- 11.6 sec chord
Dynamical classification is CENTAURR

Star training set for 78799, (2027/12/01 08:00UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:01.5 +27:57:23  1.1 13.21 171
34The Gem      06:54:37.6 +33:55:29  3.6  0.83 169
PPM 072140     06:52:03.8 +35:02:02  8.1  0.47 168
PPM 072201     06:55:03.4 +34:55:27  9.1  0.32 169
78799          06:53:48.9 +34:44:00 16.6       169
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 3.3 sigma about the mid-time.
The median site spacing is 38.4 km RECON observability=1.0 and success probability=9.1%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Sleaford 08:00:33 -57.0 Dark Down 68.1 134.8 Up 07:45:33 - 08:15:33 -3904

Kamloops 08:01:15 -61.0 Dark Down 61.3 110.9 Up 07:46:15 - 08:16:15 -4048

Kelowna 08:01:13 -61.8 Dark Down 62.1 110.5 Up 07:46:13 - 08:16:13 -4141

Peachland 08:01:14 -61.9 Dark Down 62.0 110.0 Up 07:46:14 - 08:16:14 -4152

Summerland 08:01:14 -62.0 Dark Down 62.1 109.8 Up 07:46:14 - 08:16:14 -4168

Penticton 08:01:14 -62.1 Dark Down 62.2 109.8 Up 07:46:14 - 08:16:14 -4176

Oliver 08:01:14 -62.5 Dark Down 62.3 109.2 Up 07:46:14 - 08:16:14 -4214

Anarchist Mountain Observatory 08:01:14 -62.6 Dark Down 62.5 109.1 Up 07:46:14 - 08:16:14 -4234

Victoria 08:01:26 -63.3 Dark Down 60.1 103.9 Up 07:46:26 - 08:16:26 -4260

Okanogan 08:01:15 -63.3 Dark Down 62.6 107.7 Up 07:46:15 - 08:16:15 -4303

Brewster 08:01:15 -63.6 Dark Down 62.5 107.0 Up 07:46:15 - 08:16:15 -4331

Manson/Chelan 08:01:17 -63.8 Dark Down 62.3 106.2 Up 07:46:17 - 08:16:17 -4352

Wenatchee 08:01:18 -64.3 Dark Down 62.4 105.1 Up 07:46:18 - 08:16:18 -4403

Ellensburg 08:01:19 -64.7 Dark Down 62.3 104.1 Up 07:46:19 - 08:16:19 -4447

Yakima 08:01:19 -65.1 Dark Down 62.4 103.4 Up 07:46:19 - 08:16:19 -4491

Toppenish/White Swan 08:01:19 -65.3 Dark Down 62.6 103.1 Up 07:46:19 - 08:16:19 -4516

PNWRO 08:01:14 -65.5 Dark Down 63.7 104.0 Up 07:46:14 - 08:16:14 -4565

The Dalles 08:01:21 -66.1 Dark Down 62.2 100.9 Up 07:46:21 - 08:16:21 -4595

Maupin 08:01:21 -66.5 Dark Down 62.4 100.2 Up 07:46:21 - 08:16:21 -4642

Sisters 08:01:24 -67.4 Dark Down 62.2 98.1 Up 07:46:24 - 08:16:24 -4735

Bend 08:01:22 -67.7 Dark Down 62.4 97.9 Up 07:46:22 - 08:16:22 -4763

Oregon Observatory 08:01:24 -67.9 Dark Down 62.3 97.5 Up 07:46:24 - 08:16:24 -4781

Chiloquin 08:01:26 -69.2 Dark Down 62.1 94.6 Up 07:46:26 - 08:16:26 -4923

Klamath Falls 08:01:26 -69.5 Dark Down 62.2 94.0 Up 07:46:26 - 08:16:26 -4961

Cedarville 08:01:22 -70.1 Dark Down 63.5 93.9 Up 07:46:22 - 08:16:22 -5050

Fall River/Burney 08:01:25 -70.7 Dark Down 62.6 92.1 Up 07:46:25 - 08:16:25 -5094

Dunrhomin 08:00:29 -66.2 Dark Down 74.7 105.2 Up 07:45:29 - 08:15:29 -5194

Greenville 08:01:25 -71.5 Dark Down 62.9 90.6 Up 07:46:25 - 08:16:25 -5198

Gimple 08:01:24 -71.5 Dark Down 63.0 90.7 Up 07:46:24 - 08:16:24 -5199

Nikitin 08:00:29 -66.3 Dark Down 74.7 104.5 Up 07:45:29 - 08:15:29 -5215

Quincy 08:01:23 -71.7 Dark Down 62.9 90.2 Up 07:46:23 - 08:16:23 -5220

CU-SBO 08:00:29 -66.4 Dark Down 74.7 104.2 Up 07:45:29 - 08:15:29 -5222

Portola 08:01:23 -71.8 Dark Down 63.3 90.3 Up 07:46:23 - 08:16:23 -5238

Reno 08:01:21 -72.0 Dark Down 63.8 90.2 Up 07:46:21 - 08:16:21 -5271

Carson City 08:01:21 -72.4 Dark Down 63.8 89.5 Up 07:46:21 - 08:16:21 -5311

Yerington 08:01:19 -72.5 Dark Down 64.3 89.4 Up 07:46:19 - 08:16:19 -5337

Gardnerville 08:01:20 -72.6 Dark Down 63.8 89.0 Up 07:46:20 - 08:16:20 -5339

Hawthorne 08:01:16 -72.8 Dark Down 64.7 88.8 Up 07:46:16 - 08:16:16 -5392

Lee Vining 08:01:19 -73.5 Dark Down 64.3 87.3 Up 07:46:19 - 08:16:19 -5451

Bishop 08:01:16 -73.9 Dark Down 64.8 86.4 Up 07:46:16 - 08:16:16 -5522

Beatty 08:01:11 -73.9 Dark Down 66.1 86.2 Up 07:46:11 - 08:16:11 -5581

Patrick 08:01:01 -74.2 Dark Down 68.3 83.9 Up 07:46:01 - 08:16:01 -5754

Laughlin/Bullhead City 08:01:03 -74.7 Dark Down 67.7 83.1 Up 07:46:03 - 08:16:03 -5779

Lake Havasu City 08:01:02 -75.2 Dark Down 67.8 81.5 Up 07:46:02 - 08:16:02 -5854

Wildwood 08:01:18 -77.1 Dark Down 64.3 79.5 Up 07:46:18 - 08:16:18 -5882

Idyllwild 08:01:12 -76.8 Dark Down 65.7 79.2 Up 07:46:12 - 08:16:12 -5932

George/Scottsdale 08:00:53 -74.5 Dark Down 69.6 80.1 Up 07:45:53 - 08:15:53 -5942

Calipatria 08:01:07 -76.8 Dark Down 66.6 78.1 Up 07:46:07 - 08:16:07 -6003

Yuma 08:01:02 -76.8 Dark Down 67.2 77.2 Up 07:46:02 - 08:16:02 -6053

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 78799, (2027/12/01 08:00UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 13.21 171
34The Gem      06:52:47.3 +33:57:39  3.6  0.83 169
PPM 072140     06:50:12.4 +35:04:06  8.1  0.47 168
PPM 072201     06:53:12.2 +34:57:38  9.1  0.32 169
78799          06:51:57.9 +34:46:08 16.6       169
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:34:54 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	08:00:33	-57.0	Dark	Down	68.1	134.8	Up	07:45:33 - 08:15:33	-3904
Kamloops	08:01:15	-61.0	Dark	Down	61.3	110.9	Up	07:46:15 - 08:16:15	-4048
Kelowna	08:01:13	-61.8	Dark	Down	62.1	110.5	Up	07:46:13 - 08:16:13	-4141
Peachland	08:01:14	-61.9	Dark	Down	62.0	110.0	Up	07:46:14 - 08:16:14	-4152
Summerland	08:01:14	-62.0	Dark	Down	62.1	109.8	Up	07:46:14 - 08:16:14	-4168
Penticton	08:01:14	-62.1	Dark	Down	62.2	109.8	Up	07:46:14 - 08:16:14	-4176
Oliver	08:01:14	-62.5	Dark	Down	62.3	109.2	Up	07:46:14 - 08:16:14	-4214
Anarchist Mountain Observatory	08:01:14	-62.6	Dark	Down	62.5	109.1	Up	07:46:14 - 08:16:14	-4234
Victoria	08:01:26	-63.3	Dark	Down	60.1	103.9	Up	07:46:26 - 08:16:26	-4260
Okanogan	08:01:15	-63.3	Dark	Down	62.6	107.7	Up	07:46:15 - 08:16:15	-4303
Brewster	08:01:15	-63.6	Dark	Down	62.5	107.0	Up	07:46:15 - 08:16:15	-4331
Manson/Chelan	08:01:17	-63.8	Dark	Down	62.3	106.2	Up	07:46:17 - 08:16:17	-4352
Wenatchee	08:01:18	-64.3	Dark	Down	62.4	105.1	Up	07:46:18 - 08:16:18	-4403
Ellensburg	08:01:19	-64.7	Dark	Down	62.3	104.1	Up	07:46:19 - 08:16:19	-4447
Yakima	08:01:19	-65.1	Dark	Down	62.4	103.4	Up	07:46:19 - 08:16:19	-4491
Toppenish/White Swan	08:01:19	-65.3	Dark	Down	62.6	103.1	Up	07:46:19 - 08:16:19	-4516
PNWRO	08:01:14	-65.5	Dark	Down	63.7	104.0	Up	07:46:14 - 08:16:14	-4565
The Dalles	08:01:21	-66.1	Dark	Down	62.2	100.9	Up	07:46:21 - 08:16:21	-4595
Maupin	08:01:21	-66.5	Dark	Down	62.4	100.2	Up	07:46:21 - 08:16:21	-4642
Sisters	08:01:24	-67.4	Dark	Down	62.2	98.1	Up	07:46:24 - 08:16:24	-4735
Bend	08:01:22	-67.7	Dark	Down	62.4	97.9	Up	07:46:22 - 08:16:22	-4763
Oregon Observatory	08:01:24	-67.9	Dark	Down	62.3	97.5	Up	07:46:24 - 08:16:24	-4781
Chiloquin	08:01:26	-69.2	Dark	Down	62.1	94.6	Up	07:46:26 - 08:16:26	-4923
Klamath Falls	08:01:26	-69.5	Dark	Down	62.2	94.0	Up	07:46:26 - 08:16:26	-4961
Cedarville	08:01:22	-70.1	Dark	Down	63.5	93.9	Up	07:46:22 - 08:16:22	-5050
Fall River/Burney	08:01:25	-70.7	Dark	Down	62.6	92.1	Up	07:46:25 - 08:16:25	-5094
Dunrhomin	08:00:29	-66.2	Dark	Down	74.7	105.2	Up	07:45:29 - 08:15:29	-5194
Greenville	08:01:25	-71.5	Dark	Down	62.9	90.6	Up	07:46:25 - 08:16:25	-5198
Gimple	08:01:24	-71.5	Dark	Down	63.0	90.7	Up	07:46:24 - 08:16:24	-5199
Nikitin	08:00:29	-66.3	Dark	Down	74.7	104.5	Up	07:45:29 - 08:15:29	-5215
Quincy	08:01:23	-71.7	Dark	Down	62.9	90.2	Up	07:46:23 - 08:16:23	-5220
CU-SBO	08:00:29	-66.4	Dark	Down	74.7	104.2	Up	07:45:29 - 08:15:29	-5222
Portola	08:01:23	-71.8	Dark	Down	63.3	90.3	Up	07:46:23 - 08:16:23	-5238
Reno	08:01:21	-72.0	Dark	Down	63.8	90.2	Up	07:46:21 - 08:16:21	-5271
Carson City	08:01:21	-72.4	Dark	Down	63.8	89.5	Up	07:46:21 - 08:16:21	-5311
Yerington	08:01:19	-72.5	Dark	Down	64.3	89.4	Up	07:46:19 - 08:16:19	-5337
Gardnerville	08:01:20	-72.6	Dark	Down	63.8	89.0	Up	07:46:20 - 08:16:20	-5339
Hawthorne	08:01:16	-72.8	Dark	Down	64.7	88.8	Up	07:46:16 - 08:16:16	-5392
Lee Vining	08:01:19	-73.5	Dark	Down	64.3	87.3	Up	07:46:19 - 08:16:19	-5451
Bishop	08:01:16	-73.9	Dark	Down	64.8	86.4	Up	07:46:16 - 08:16:16	-5522
Beatty	08:01:11	-73.9	Dark	Down	66.1	86.2	Up	07:46:11 - 08:16:11	-5581
Patrick	08:01:01	-74.2	Dark	Down	68.3	83.9	Up	07:46:01 - 08:16:01	-5754
Laughlin/Bullhead City	08:01:03	-74.7	Dark	Down	67.7	83.1	Up	07:46:03 - 08:16:03	-5779
Lake Havasu City	08:01:02	-75.2	Dark	Down	67.8	81.5	Up	07:46:02 - 08:16:02	-5854
Wildwood	08:01:18	-77.1	Dark	Down	64.3	79.5	Up	07:46:18 - 08:16:18	-5882
Idyllwild	08:01:12	-76.8	Dark	Down	65.7	79.2	Up	07:46:12 - 08:16:12	-5932
George/Scottsdale	08:00:53	-74.5	Dark	Down	69.6	80.1	Up	07:45:53 - 08:15:53	-5942
Calipatria	08:01:07	-76.8	Dark	Down	66.6	78.1	Up	07:46:07 - 08:16:07	-6003
Yuma	08:01:02	-76.8	Dark	Down	67.2	77.2	Up	07:46:02 - 08:16:02	-6053