RECON: TNO occultation with 04VV130

Event between 04VV130 and star GA1300:03111766 with event index number of 1549965

Geocentric closest approach at 2025/12/14 06:07:45 UTC

J2000 position of star is 05:47:20.9 +40:05:35
Equinox of date position of star is 05:48:42.4 +40:05:56
Stellar brightness G=14.4, use SENSEUP=128
Star is 112 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 32.2 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 484 seconds.
The 1-sigma cross-track error in the shadow position is 4480 km.
The sky-plane scale is 22665.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=189.7 km assuming a 5% albedo -- 7.6 sec chord
Diameter=77.4 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04VV130, (2025/12/14 06:08UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.3 +27:57:41  1.1 27.07  86
34Bet Aur      06:01:26.0 +44:56:50  1.9  5.35 109
PPM 070954     05:54:28.1 +39:34:43  6.5  1.14 111
PPM 048463     05:50:46.5 +40:10:20  8.4  0.32 111
04VV130        05:49:09.8 +40:06:02 14.4       111
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 1.9 sigma about the mid-time.
The median site spacing is 24.7 km RECON observability=1.0 and success probability=11.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:09:16 -56.6 Dark Down 66.4 102.7 Up 05:54:16 - 06:24:16 3332
Summerland 06:09:17 -56.7 Dark Down 66.3 101.7 Up 05:54:17 - 06:24:17 3306
Penticton 06:09:17 -56.8 Dark Down 66.3 101.7 Up 05:54:17 - 06:24:17 3297
Okanagan Falls 06:09:17 -56.9 Dark Down 66.4 101.3 Up 05:54:17 - 06:24:17 3277
Oliver 06:09:17 -57.0 Dark Down 66.4 100.9 Up 05:54:17 - 06:24:17 3260
Anarchist Mountain Observatory 06:09:17 -57.2 Dark Down 66.6 100.7 Up 05:54:17 - 06:24:17 3238
Oroville 06:09:17 -57.2 Dark Down 66.5 100.5 Up 05:54:17 - 06:24:17 3231
Tonasket 06:09:18 -57.4 Dark Down 66.6 100.0 Up 05:54:18 - 06:24:18 3207
Okanogan 06:09:19 -57.6 Dark Down 66.5 99.0 Up 05:54:19 - 06:24:19 3174
Brewster 06:09:19 -57.6 Dark Down 66.5 98.2 Up 05:54:19 - 06:24:19 3150
Manson/Chelan 06:09:20 -57.6 Dark Down 66.2 97.4 Up 05:54:20 - 06:24:20 3135
Entiat 06:09:21 -57.7 Dark Down 66.2 96.9 Up 05:54:21 - 06:24:21 3113
Wenatchee 06:09:22 -57.8 Dark Down 66.2 96.2 Up 05:54:22 - 06:24:22 3088
Ellensburg 06:09:23 -57.9 Dark Down 66.1 95.1 Up 05:54:23 - 06:24:23 3049
Yakima 06:09:23 -58.2 Dark Down 66.1 94.1 Up 05:54:23 - 06:24:23 3006
Toppenish/White Swan 06:09:23 -58.4 Dark Down 66.2 93.8 Up 05:54:23 - 06:24:23 2980
Pasco 06:09:20 -59.2 Dark Down 67.1 94.6 Up 05:54:20 - 06:24:20 2941
Goldendale 06:09:25 -58.5 Dark Down 66.0 92.2 Up 05:54:25 - 06:24:25 2931
The Dalles 06:09:26 -58.4 Dark Down 65.7 91.4 Up 05:54:26 - 06:24:26 2915
PNWRO 06:09:20 -59.4 Dark Down 67.3 94.2 Up 05:54:20 - 06:24:20 2910
George/Umatilla 06:09:21 -59.3 Dark Down 67.0 93.6 Up 05:54:21 - 06:24:21 2910
Maupin 06:09:27 -58.8 Dark Down 65.8 90.6 Up 05:54:27 - 06:24:27 2868
Madras/Culver 06:09:27 -59.0 Dark Down 65.8 89.3 Up 05:54:27 - 06:24:27 2811
Sisters 06:09:29 -59.0 Dark Down 65.5 88.3 Up 05:54:29 - 06:24:29 2786
Redmond 06:09:29 -59.2 Dark Down 65.7 88.5 Up 05:54:29 - 06:24:29 2774
Bend 06:09:29 -59.3 Dark Down 65.6 88.0 Up 05:54:29 - 06:24:29 2755
Oregon Observatory 06:09:29 -59.3 Dark Down 65.5 87.5 Up 05:54:29 - 06:24:29 2739
La Pine/Gilchrist 06:09:30 -59.4 Dark Down 65.5 87.0 Up 05:54:30 - 06:24:30 2719
North Lake 06:09:29 -60.0 Dark Down 65.9 86.4 Up 05:54:29 - 06:24:29 2659
Chiloquin 06:09:33 -59.7 Dark Down 65.1 84.4 Up 05:54:33 - 06:24:33 2609
Paisley 06:09:29 -60.5 Dark Down 66.1 85.4 Up 05:54:29 - 06:24:29 2592
Klamath Falls 06:09:33 -59.9 Dark Down 65.2 83.7 Up 05:54:33 - 06:24:33 2571
Tulelake 06:09:33 -60.3 Dark Down 65.4 83.3 Up 05:54:33 - 06:24:33 2535
Lakeview 06:09:29 -60.9 Dark Down 66.2 84.3 Up 05:54:29 - 06:24:29 2534
Cedarville 06:09:29 -61.3 Dark Down 66.3 82.9 Up 05:54:29 - 06:24:29 2460
Fall River/Burney 06:09:33 -60.8 Dark Down 65.3 81.3 Up 05:54:33 - 06:24:33 2437
Susanville 06:09:32 -61.6 Dark Down 65.8 80.3 Up 05:54:32 - 06:24:32 2352
Greenville 06:09:33 -61.5 Dark Down 65.5 79.6 Up 05:54:33 - 06:24:33 2330
Gimple 06:09:32 -61.6 Dark Down 65.6 79.6 Up 05:54:32 - 06:24:32 2327
Quincy 06:09:33 -61.6 Dark Down 65.5 79.1 Up 05:54:33 - 06:24:33 2308
Portola 06:09:32 -62.0 Dark Down 65.8 79.0 Up 05:54:32 - 06:24:32 2283
Reno 06:09:30 -62.6 Dark Down 66.2 78.6 Up 05:54:30 - 06:24:30 2240
Carson City 06:09:31 -62.7 Dark Down 66.2 77.8 Up 05:54:31 - 06:24:31 2201
Gardnerville 06:09:31 -62.9 Dark Down 66.2 77.3 Up 05:54:31 - 06:24:31 2174
Yerington 06:09:29 -63.3 Dark Down 66.6 77.5 Up 05:54:29 - 06:24:29 2166
Hawthorne 06:09:28 -63.8 Dark Down 66.9 76.6 Up 05:54:28 - 06:24:28 2104
Niwot 06:08:43 -70.5 Dark Down 77.3 84.7 Up 05:53:43 - 06:23:43 2066
SwRI 06:08:44 -70.5 Dark Down 77.2 84.2 Up 05:53:44 - 06:23:44 2055
Lee Vining 06:09:30 -63.8 Dark Down 66.4 75.3 Up 05:54:30 - 06:24:30 2054
Tonopah 06:09:24 -65.0 Dark Down 67.9 75.8 Up 05:54:24 - 06:24:24 2024
Bishop 06:09:28 -64.6 Dark Down 66.8 74.0 Up 05:54:28 - 06:24:28 1974
Beatty 06:09:23 -65.9 Dark Down 67.9 73.0 Up 05:54:23 - 06:24:23 1889
Lone Pine 06:09:28 -65.1 Dark Down 66.8 72.3 Up 05:54:28 - 06:24:28 1885
Indian Springs 06:09:20 -66.8 Dark Down 68.6 72.3 Up 05:54:20 - 06:24:20 1832
CPSLO 06:09:37 -63.7 Dark Down 64.4 69.6 Up 05:54:37 - 06:24:37 1806
Henderson 06:09:18 -67.6 Dark Down 69.0 70.9 Up 05:54:18 - 06:24:18 1761
Searchlight/Boulder City 06:09:18 -67.9 Dark Down 68.8 69.5 Up 05:54:18 - 06:24:18 1697
Patrick 06:09:15 -68.6 Dark Down 69.6 69.2 Up 05:54:15 - 06:24:15 1672
Laughlin/Bullhead City 06:09:18 -68.3 Dark Down 69.0 68.7 Up 05:54:18 - 06:24:18 1658
Kingman/Dolan Springs 06:09:16 -68.6 Dark Down 69.4 68.7 Up 05:54:16 - 06:24:16 1651
Mohave Valley 06:09:18 -68.4 Dark Down 68.9 68.1 Up 05:54:18 - 06:24:18 1629
Wildwood 06:09:32 -65.7 Dark Down 65.5 67.0 Up 05:54:32 - 06:24:32 1628
DCO 06:09:13 -69.3 Dark Down 70.0 68.3 Up 05:54:13 - 06:24:13 1626
Lake Havasu City 06:09:17 -68.8 Dark Down 68.9 67.0 Up 05:54:17 - 06:24:17 1581
Idyllwild 06:09:26 -67.3 Dark Down 66.8 65.9 Up 05:54:26 - 06:24:26 1547
Parker 06:09:17 -68.9 Dark Down 68.8 66.2 Up 05:54:17 - 06:24:17 1542
Blythe 06:09:19 -68.9 Dark Down 68.4 65.1 Up 05:54:19 - 06:24:19 1491
Calipatria 06:09:23 -68.4 Dark Down 67.5 64.3 Up 05:54:23 - 06:24:23 1457
Yuma 06:09:20 -69.3 Dark Down 67.9 63.0 Up 05:54:20 - 06:24:20 1392

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 04VV130, (2025/12/14 06:08UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 27.07  86
34Bet Aur      05:59:31.6 +44:56:51  1.9  5.35 109
PPM 070954     05:52:39.6 +39:34:29  6.5  1.14 111
PPM 048463     05:48:57.5 +40:09:57  8.4  0.32 111
04VV130        05:47:20.9 +40:05:35 14.4       112
Positions are for J2000

Event circumstances last updated at 2019/06/02 20:11:14 UT

Marc W. Buie, Southwest Research Institute

RECON