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2021-12-05 / TYC 0152-01576-1 / (3761) Romanskaya

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alberto Ossola O+ VID M230 CH GPS++ 22:19:22 22:21:02.58 22:21:02.90 22:22:29 0.08 0.08 0.32 4.8
2 show Andrea Manna O+ VID M200 CH GPS++ 22:19:55 22:21:00.75 22:21:02.91 22:22:50 0.04 0.04 2.16 32.2
3 show Stefano Sposetti O+ CCD M420 CH GPS++ 22:18:00 22:21:00.12 22:21:02.17 22:24:00 0.05 0.05 2.05 30.5
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#59 : 9167a1a8-d3a0-4557-a41e-209254eb0ae7 [db: observed]

Using prediction 9167a1a8-d3a0-4557-a41e-209254eb0ae7 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 34 x 18 km
a',b' = 17.1, 8.8 km
X0,Y0 = 1434.5, 20.7 km
Mean diameter = 25 km

From 3 chords (VID,CCD)








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2021-12-05, 22:21 UT (JD = 2459554.431)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 32821.015.275 246°, 63° 2.451127e68427.40.0° None2019-09-26 not scaled 2019-05-07
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

 
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : 9167a1a8-d3a0-4557-a41e-209254eb0ae7 [observed]

 Occultation Date + Time   : 2021-12-05 at 22:19:08 UT +/- 0.01 min  [1]
 Object Designation        : (3761) Romanskaya
 Orbit Class               : MBA
 Star Designation          : GDR3 3126606036800020096
 Star Coordinates (ICRF)   : RA = 06 51 26.4671, DE = +03 23 15.902  [2]
 Star Magnitudes           : G = 11.88 mag, RP = 11.49 mag, BP = 12.11 mag
 Object Magnitude          : V = 17.7 mag
 Estimated Magnitude Drop  : 5.8 mag
 Estimated Max. Duration   : 1.1 sec
 Object Mean Diameter      : 16 km  (src: astorb)
 Speed of the shadow       : 14.9 km/s
 Elongation to Moon & Sun  : 157° (sunlit = 4%), Sun = 145°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.14 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#59

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
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