2024-12-20 / TYC 2455-00778-1 / (18691) 1998 HE1
| # | OBS | Observer | Occ | Meth. | Instr. | CC |
TSRC | UT1 | UT2 | UT3 | UT4 | UT2E | UT3E | Dur. | Chrd |
|---|
| 1 |
show |
William Stewart |
O+ |
VID |
M279 |
GB |
GPS |
20:02:29 |
20:03:27.670 |
20:03:28.150 |
20:04:29 |
0.04 |
0.04 |
0.48 |
7.0 |
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
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1 observation found in db: sodis
Available (probably) matching predictions (click on the link to switch):
| Map with groundtrack and observer stations |
|---|
| Event Details |
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Occultation UUID [and DB] : c4fdc5b0-ddb5-11f0-547e-131cdefbb0d2 [observed]
Occultation Date + Time : 2024-12-20 at 19:58:13 UT +/- 0.0 min [1]
Object Designation : (18691) 1998 HE1
Orbit Class : MBA
Star Designation : GDR3 0890205781110942720
Star Coordinates (ICRF) : RA = 07 16 46.6410, DE = +32 38 25.037 [2]
Star Magnitudes : G = 12.2 mag, RP = 12.23 mag, BP = 12.19 mag
Object Magnitude : V = 18.85 mag
Estimated Magnitude Drop : 6.7 mag
Estimated Max. Duration : 0.5 sec
Object Mean Diameter : 6.9 km (src: astorb)
Speed of the shadow : 14.5 km/s
Elongation to Moon & Sun : 50° (sunlit = 70%), Sun = 160°
Cross-track uncertainty : 0.4 mas = 0 km = 0.11 path-width (1-sig)
RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#56
Note : FP:true
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0
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