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2019-10-12 / TYC 1901-00665-1 / (118) Peitho

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Olivier Dechambre O+ CCD M279 FR GPS 01:53:00 01:58:01.21 01:58:02.96 02:03:00 0.02 0.02 1.75 28.3
2 show Roland Boninsegna O+ VID M400 BE GPS++ 01:56:24 01:58:14.40 01:58:17.12 02:00:17 0.02 0.02 2.72 44.1
3 show Jean Bourgeois O+ VID M356 BE GPS++ 01:57:16 01:58:15.72 01:58:17.62 01:59:16 0.02 0.02 1.90 30.8
4 show Olivier Schreurs O+ VID M280 BE GPS++ 01:57:11 01:58:20.20 01:58:22.44 01:59:21 0.08 0.08 2.24 36.3
5 show Arnaud Leroy O- CCD M200 FR 01:57:00 01:59:00
6 show F. Van Den Abbeel O- VID M200 BE 01:57:16 01:59:15
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#93 : 0b31802f-74eb-4818-a7b4-101d39b84160 [db: observed]
JPL#93 : fe6ec467-0d90-4339-a92b-671c3b1a04dd [db: observed]

Using prediction 0b31802f-74eb-4818-a7b4-101d39b84160 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 = 52 x 37 km
a',b' = 26.1, 18.3 km
X0,Y0 = 549.7, 22.8 km
Mean diameter = 44 km

From 4 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: 2019-10-12, 01:58 UT (JD = 2458768.582)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 43973.07.806 179°, 60° 2.443482e615286.60.0° this pole agrees with occultation2020-05-06 not scaled 2020-04-26
# 44741.07.807 346°, 34° 2.457251e61517.60.0° None2020-10-05 not scaled 2019-10-23
# 44751.07.807 176°, 59° 2.457251e61517.60.0° None2020-10-05 not scaled 2019-10-23
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] : 0b31802f-74eb-4818-a7b4-101d39b84160 [observed]

 Occultation Date + Time   : 2019-10-12 at 02:00:51 UT +/- 0.01 min  [1]
 Object Designation        : (118) Peitho
 Orbit Class               : MBA
 Star Designation          : GDR3 3385143070651901312
 Star Coordinates (ICRF)   : RA = 06 49 57.3483, DE = +26 54 00.432  [2]
 Star Magnitudes           : G = 12.03 mag, RP = 11.59 mag, BP = 12.32 mag
 Object Magnitude          : V = 12.89 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 2.6 sec
 Object Mean Diameter      : 42 km  (src: astorb)
 Speed of the shadow       : 16.2 km/s
 Elongation to Moon & Sun  : 103° (sunlit = 97%), Sun = 97°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.39 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#93

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

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