2024-08-28 / UCAC4 359-203511 / (458) Hercynia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Andreas Tazreiter	O+	CCD	T405	AT	GPS	21:11:53	21:12:33.44	21:12:36.07	21:18:40	0.1	0.1	2.63	31.0
2	show	Anna Marciniak	O+	CCD	M400	PL	NTP	21:11:06	21:12:06.340	21:12:08.860	21:13:11	0.11	0.10	2.52	29.7

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL#120 : 4cabc530-ddb5-11f0-547e-7f4ee7e245c5 [db: observed]

Using prediction 4cabc530-ddb5-11f0-547e-7f4ee7e245c5 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: X0,Y0 = 3200.9, 19.0 km Circular diameter = 32 km From 2 chords (CCD) Chords to ignore: Fill: Grid: Show (close) miss chords: 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: 2024-08-28, 21:11 UT (JD = 2460551.383)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 2728	1.5	21.814	74°, 14°	2.450983e6	9568.4	0.0°	None	2018-07-19	not scaled	2018-07-18
# 2729	1.5	21.814	262°, 32°	2.450983e6	9568.4	0.0°	None	2018-07-19	not scaled	2018-07-18

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

Map with groundtrack and observer stations

Event Details

Occultation UUID [and DB] : 4cabc530-ddb5-11f0-547e-7f4ee7e245c5 [observed] Occultation Date + Time : 2024-08-28 at 21:16:05 UT +/- 0.01 min [1] Object Designation : (458) Hercynia Orbit Class : MBA Star Designation : GDR3 6836638335142743168 Star Coordinates (ICRF) : RA = 21 47 44.8130, DE = -18 19 03.405 [2] Star Magnitudes : G = 11.31 mag, RP = 10.66 mag, BP = 11.81 mag Object Magnitude : V = 13.57 mag Estimated Magnitude Drop : 2.4 mag Estimated Max. Duration : 3.3 sec Object Mean Diameter : 38.8 km (src: astorb) Speed of the shadow : 11.8 km/s Elongation to Moon & Sun : 134° (sunlit = 24%), Sun = 166° Cross-track uncertainty : 0.7 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.84 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#120 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia

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