Cora»Occultation

2025-10-18 / TYC 1875-00106-1 / (7858) Bolotov

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michele Turchenko	O+	VID	M150	RU	GPS	18:33:00	18:34:08.92	18:34:09.54	18:35:07	0.090	0.090	0.62	3.2
2	show	Anton Zhdanov	O+	VID	M150	RU	GPS	18:33:06	18:34:08.97	18:34:09.51	18:35:00	0.060	0.050	0.54	2.8

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

2 observations found in db: sodis

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

JPL#65 : 96df1a50-ddb8-11f0-547e-85fddf6fb231 [db: observed]

Using prediction 96df1a50-ddb8-11f0-547e-85fddf6fb231 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:
Circular profile fit was not successful ...

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.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 96df1a50-ddb8-11f0-547e-85fddf6fb231 [observed] Occultation Date + Time : 2025-10-18 at 18:38:11 UT +/- 0.01 min [1] Object Designation : (7858) Bolotov Orbit Class : MBA Star Designation : GDR3 3431697702941104000 Star Coordinates (ICRF) : RA = 05 58 02.7551, DE = +29 24 45.725 [2] Star Magnitudes : G = 10.93 mag, RP = 10.17 mag, BP = 11.55 mag Object Magnitude : V = 17.72 mag Estimated Magnitude Drop : 6.8 mag Estimated Max. Duration : 1.0 sec Object Mean Diameter : 5.2 km (src: astorb) Speed of the shadow : 5.1 km/s Elongation to Moon & Sun : 86° (sunlit = 7%), Sun = 116° Cross-track uncertainty : 0.3 mas = 0 km = 0.06 path-width (1-sig) RUWE and duplicate source : 1.21 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#65 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 96df1a50-ddb8-11f0-547e-85fddf6fb231 [observed] Occultation Date + Time : 2025-10-18 at 18:38:11 UT +/- 0.01 min [1] Object Designation : (7858) Bolotov Orbit Class : MBA Star Designation : GDR3 3431697702941104000 Star Coordinates (ICRF) : RA = 05 58 02.7551, DE = +29 24 45.725 [2] Star Magnitudes : G = 10.93 mag, RP = 10.17 mag, BP = 11.55 mag Object Magnitude : V = 17.72 mag Estimated Magnitude Drop : 6.8 mag Estimated Max. Duration : 1.0 sec Object Mean Diameter : 5.2 km (src: astorb) Speed of the shadow : 5.1 km/s Elongation to Moon & Sun : 86° (sunlit = 7%), Sun = 116° Cross-track uncertainty : 0.3 mas = 0 km = 0.06 path-width (1-sig) RUWE and duplicate source : 1.21 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#65 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

(If error 404: link not valid which means no data available)

Aladin Sky Atlas

Loading sky atlas…

Aladin Lite direct link (has Gaia overlay)