Collaborative Occultation Resources and Archive (CORA)

2025-02-05 / UCAC4 691-049197 / (5027) Androgeos

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	CCD	M300	ES	NTP	19:27:33	19:29:32.18	19:29:34.38	19:31:33	0.29	0.29	2.20	38.1
2	show	Deborah Smith	O+	CCD	M280	ES	NTP	19:27:33	19:29:34.53	19:29:37.01	19:31:32	0.12	0.12	2.48	42.9
3	show	Ferran Casarramona	O-	VID	M200	ES	GPS	19:28:01			19:31:01

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: sodis

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

JPL#60 : 1d9393b0-8a12-11ef-78cd-9c77f5b73b25 [db: asteroids]

Using prediction 1d9393b0-8a12-11ef-78cd-9c77f5b73b25 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:
X0,Y0 = 366.4, -5.8 km
Circular diameter = 76 km

From 2 chords (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: 2025-02-05, 19:29 UT (JD = 2460712.312)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3612	1.0	11.320	276°, 36°	2.451162e6	9550.3	0.0°	None	2019-09-26	not scaled	2019-05-07
# 3613	1.0	11.320	56°, 28°	2.451162e6	9550.3	0.0°	None	2019-09-26	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] : 1d9393b0-8a12-11ef-78cd-9c77f5b73b25 [asteroids] Occultation Date + Time : 2025-02-05 at 19:24:44 UT +/- 0.04 min [1] Object Designation : (5027) Androgeos Orbit Class : JTRO Star Designation : GDR3 1011958173987603072 Star Coordinates (ICRF) : RA = 09 17 26.6348, DE = +48 07 41.511 [2] Star Magnitudes : G = 14.05 mag, RP = 13.64 mag, BP = 14.31 mag Object Magnitude : V = 16.96 mag Estimated Magnitude Drop : 3.0 mag Estimated Max. Duration : 2.2 sec Object Mean Diameter : 37.8 km (src: astorb) Speed of the shadow : 17.3 km/s Elongation to Moon & Sun : 73° (sunlit = 56%), Sun = 148° Cross-track uncertainty : 0.3 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#60 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 1d9393b0-8a12-11ef-78cd-9c77f5b73b25 [asteroids]

 Occultation Date + Time   : 2025-02-05 at 19:24:44 UT +/- 0.04 min  [1]
 Object Designation        : (5027) Androgeos
 Orbit Class               : JTRO
 Star Designation          : GDR3 1011958173987603072
 Star Coordinates (ICRF)   : RA = 09 17 26.6348, DE = +48 07 41.511  [2]
 Star Magnitudes           : G = 14.05 mag, RP = 13.64 mag, BP = 14.31 mag
 Object Magnitude          : V = 16.96 mag
 Estimated Magnitude Drop  : 3.0 mag
 Estimated Max. Duration   : 2.2 sec
 Object Mean Diameter      : 37.8 km  (src: astorb)
 Speed of the shadow       : 17.3 km/s
 Elongation to Moon & Sun  : 73° (sunlit = 56%), Sun = 148°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

 
 [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
09 17 26.635 +48 07 41.51 FoV: 29.96' +– × × Go to:
Aladin Lite direct link (has Gaia overlay)