Binary asteroid IAU announcement telegram

(2500) ALASCATTALO
V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; F. Pilcher, Organ Mesa Observatory, Las Cruces, NM, U.S.A.; A.
Marchini, R. Papini, and F. Salvaggio, Dipartimento di Scienze Fisiche, Della
Terra e Dell’Ambiente, University of Siena; J. Oey, Blue Mountains
Observatory, Leura, NSW, Australia; D. Pray, Sugarloaf Mountain Observatory,
South Deerfield, MA, U.S.A.; R. Durkee, Shed of Science South Observatory,
Pontotoc, TX, U.S.A.; W. Cooney, J. Gross, and D. Terrell, Sonoita Research
Observatory, Sonoita, AZ, U.S.A.; R. Goncalves, Linhaceira Observatory,
Tomar, Portugal; A. Aznar, Isaac Aznar Observatory, Alcublas, Valencia,
Spain; C. Odden, Phillips Academy, Andover, MA, U.S.A.; and J. Kemp,
Middlebury College, Middlebury, VT, U.S.A., report that photometric
observations taken with a 0.35-m telescope at the Sopot Observatory in Serbia,
a 0.35-m telescope at the Organ Mesa Observatory, a 0.30-m telescope at the
Astronomical Observatory of the University of Siena, a 0.35-m telescope at the
Blue Mountains Observatory, a 0.50-m telescope at the Sugarloaf Mountain
Observatory, a 0.50-m telescope at the Shed of Science South Observatory, a
0.50-m telescope at the Sonoita Research Observatory, a 0.35-m telescope at
the Linhaceira Observatory, a 0.35-m telescope at the Isaac Aznar Observatory,
and a 0.50-m telescope at the Mittelman Observatories at New Mexico Skies
during Mar. 20-May 19 reveal that minor planet (2500) is a binary system
with an orbital period of 169.1 ± 0.3 hr. The primary shows a period of
2.75123 ± 0.00009 hr and has a lightcurve amplitude of 0.19 magnitude at
solar phases 2-17 degrees, suggesting a nearly spheroidal shape. Mutual
eclipse/occultation events that are 0.15 to 0.27 magnitude deep indicate a
secondary-to-primary mean-diameter ratio of 0.39 ± 0.02.

2020 June 7 (CBET 4791) Daniel W. E. Green [2020-06-08 06:24, Ondrejov]

(285331) 1999 FN53

Number: 285331
Designation: 1999 FN53
Name:  –
First Date: 2015/04/21
Points: 393
P1: 4.42
P1 error: 0.01
Max. Ampl.: 1.07

 

IAC80 telescope

Observatorio del Teide, IAC

EURONEAR

(624) Hektor

Number: 624
Designation:-
Name:  Hektor
First Date: 2019/08/28
Points: 224
P1: 6.924
P1 error: 0.001
Max. Ampl.: 0.16

 

 

First Date: 2019/09/05
Points: 80
P1: 6.92
P1 error: 0.01
Max. Ampl.: 0.14

 

 

 

Hektor star occultation: 2019/08/28

Troyan asteroid