Cora»Occultation

1998-03-26 / PPM 96685 / (578) Happelia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michal Siwak	O+	VIS	M142	PL	RAD++	21:15:45	21:29:30.8	21:29:34.7	21:30:00	0.5	0.2	3.90	42.5
2	show	Leszek Benedyktowicz	O+	VID	M350	PL	RAD++	21:10:00	21:29:26.44	21:29:30.20	21:40:00	0.04	0.04	3.76	41.0
3	show	Jose-Alberto Berdejo	O-	VIS	M150	ES		21:09:34			21:39:07
4	show	Olivier Gadal	O-	VIS	M200	FR
5	show	Renee Gadal	O-	CCD	M410	FR
6	show	Alain Klotz	O-	VIS	M200	FR		21:21:00			21:34:00
7	show	Attila Kosa-Kiss	O-	VIS	L63	RO		21:10:00			21:34:00
8	show	Vince Tuboly	O-		L72	HU		21:20:00			21:40:00
9	show	Gert Holler	O-	VIS	M400	AT		21:20:45			21:40:20
10	show	Szabolcs Nyari	O-	VIS	L63	HU		21:10:00			21:43:00
11	show	Peter Drengubiak	O-	VIS	M150	SK		21:19:00			21:40:00
12	show	Peter Kusnirak	O-	VIS	L150	SK		21:13:00			21:36:10
13	show	Michal Rottenborn	O-		L100	CZ		21:19:00			21:36:00
14	show	Karel Halir	O-	VIS	L100	CZ		21:24:36			21:36:08
15	show	Libor Smid	O-		M100	CZ		21:22:00			21:40:00
16	show	Zdenek Brichta	O-		M200	CZ		21:00:00			21:49:00
17	show	Vaclav Cejka	O-		L200	CZ		21:21:00			21:39:00
18	show	Ludek Vasta	O-		M350	CZ		21:19:00			21:38:00
19	show	Jan Manek	O-	VIS	L180	CZ		21:22:30			21:37:30
20	show	Vaclav Priban	O-		M300	CZ		21:11:00			21:42:00
21	show	Martin Lehky	O-	VIS	L110	CZ		21:18:00			21:31:06
22	show	Josef Kujal	O-	VIS	L100	CZ		21:15:00			21:37:20
23	show	Michal Kyncl	O-	VIS	L60	CZ		21:17:00			21:38:00
24	show	Janusz Wiland	O-	VIS	M250	PL		21:10:00			21:42:00
25	show	Wojciech Burzynski	O-			PL
26	show	Valerij Kondrashin	O-	PHM	M400	RU		21:13:00			21:50:00

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

26 observations found in db: euraster

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

JPL#136 : 3df400d0-2277-4528-b7bc-12f80f5ee421 [db: observed]

Using prediction 3df400d0-2277-4528-b7bc-12f80f5ee421 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 = -1531.2, 15.2 km
Circular diameter = 60 km

From 2 chords (VID,VIS)

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: 1998-03-26, 21:29 UT (JD = 2450899.395)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 660	None	10.064	339°, 62°	2.450857e6	42.4	0.0°	None	None	70.0 +/- 5.0 km	2013-02-11

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] : 3df400d0-2277-4528-b7bc-12f80f5ee421 [observed] Occultation Date + Time : 1998-03-26 at 21:26:00 UT +/- 0.04 min [1] Object Designation : (578) Happelia Orbit Class : MBA Star Designation : GDR3 0888483636665076224 Star Coordinates (ICRF) : RA = 06 53 24.2557, DE = +29 33 55.314 [2] Star Magnitudes : G = 7.87 mag, RP = 6.67 mag, BP = 9.35 mag Object Magnitude : V = 15.48 mag Estimated Magnitude Drop : 7.6 mag Estimated Max. Duration : 6.4 sec Object Mean Diameter : 69 km (src: astorb) Speed of the shadow : 10.9 km/s Elongation to Moon & Sun : 113° (sunlit = 2%), Sun = 96° Cross-track uncertainty : 0.8 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 1.1 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#136 Object is a Gaia mass determination target ! [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 3df400d0-2277-4528-b7bc-12f80f5ee421 [observed]

 Occultation Date + Time   : 1998-03-26 at 21:26:00 UT +/- 0.04 min  [1]
 Object Designation        : (578) Happelia
 Orbit Class               : MBA
 Star Designation          : GDR3 0888483636665076224
 Star Coordinates (ICRF)   : RA = 06 53 24.2557, DE = +29 33 55.314  [2]
 Star Magnitudes           : G = 7.87 mag, RP = 6.67 mag, BP = 9.35 mag
 Object Magnitude          : V = 15.48 mag
 Estimated Magnitude Drop  : 7.6 mag
 Estimated Max. Duration   : 6.4 sec
 Object Mean Diameter      : 69 km  (src: astorb)
 Speed of the shadow       : 10.9 km/s
 Elongation to Moon & Sun  : 113° (sunlit = 2%), Sun = 96°
 Cross-track uncertainty   : 0.8 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.1 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#136

 Object is a Gaia mass determination target !

 [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

Aladin Lite direct link (has Gaia overlay)

Collaborative Occultation Resources and Archive (CORA)

1998-03-26 / PPM 96685 / (578) Happelia

Sky projection (artificial light) for occ. time: 1998-03-26, 21:29 UT (JD = 2450899.395)