2021-04-24 / G173116.4-275152 / (2241) Alcathous
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Lionel Rousselot
O+
CCD
M250
FR
GPS++
03:26:30
03:28:23.98
03:28:42.85
03:30:30
2.49
2.49
18.87
120.8
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
More 1 observation found in db: euraster
Available (probably) matching predictions (click on the link to switch):
Using prediction 5bab24ea-b071-47c7-b780-775ed304d53a for map and profile fit
Map with groundtrack and observer stations
Reset Map to default
Event Details
Occultation UUID [and DB] : 5bab24ea-b071-47c7-b780-775ed304d53a [observed]
Occultation Date + Time : 2021-04-24 at 03:23:09 UT +/- 0.12 min [1]
Object Designation : (2241) Alcathous
Orbit Class : JTRO
Star Designation : GDR3 4061207658033690240
Star Coordinates (ICRF) : RA = 17 31 16.3672, DE = -27 51 51.998 [2]
Star Magnitudes : G = 14.85 mag, RP = 13.37 mag, BP = 17.8 mag
Object Magnitude : V = 15.82 mag
Estimated Magnitude Drop : 1.3 mag
Estimated Max. Duration : 18.0 sec
Object Mean Diameter : 115 km (src: astorb)
Speed of the shadow : 6.4 km/s
Elongation to Moon & Sun : 92° (sunlit = 87%), Sun = 130°
Cross-track uncertainty : 3.3 mas = 10 km = 0.09 path-width (1-sig)
RUWE and duplicate source : 1.08 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#88
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0
(If error 404: link not valid which means no data available)