(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


(624) Hektor

Number: 624
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

(293054) 2006 WO127

Number: 293054
Designation: 2006 WP127
Name:  –
First Date: 2019/07/19
Points: 398
P1: 5.9659
P1 error: 0.0001
Max. Ampl.: 0.25


Lightcurve from Isaac Aznar Observatory  and TAR2 telescope (IAC-Solar System Group).

(455432) 2003 RP8

Number: 455432
Designation: 2003 RP8
Name:  –
First Date: 2019/07/27
Points: 228
P1: 2.289
P1 error: 0.004
Max. Ampl.: 0.42


Lightcurve from POP Observatory and TAR2 telescope (IAC-Solar System Group).

(12538) 1998 OH

Number: 12538
Designation: 1998 OH
Name:  –
First Date: 2019/07/10
Points: 81
P1: 2.58
P1 error: 0.01
Max. Ampl.: 0.15


Lightcurve from TAR2 telescope (IAC-Solar System Group) and APT-Observatories Group.

(453778) 2011 JK

Number: 453778
Designation: 2011 JK
Name:  –
First Date: 2019/06/07
Points: 158
P1: 2.578
P1 error: 0.003
Max. Ampl.: 0.14


Lightcurve from Isaac Aznar Observatory and TAR2 telescope (IAC, Solar System Group).

(355256) 2007 KN4

Number: 355256
Designation: 2007 KN4
Name:  –
First Date: 2019/04/27
Points: 516
P1: 7.142
P1 error: 0.001
Max. Ampl.: 0.35


Lightcurve from Isaac Aznar Observatory and TAR2 telescope (IAC, Solar System Group).

Asteroid pairs: a complex picture


In the main belt of asteroids, there exist pairs of asteroids that are on highly similar heliocentric orbits. They were discovered by Vokrouhlický and Nesvorný (2008) who showed that the asteroid pairs cannot be random coincidences of unrelated asteroids from the local asteroid population, but most of them must be genetically related pairs.

Being motivated by the progress in our knowledge and understanding of asteroid pairs, we underwent a thorough photometric study of a sample of nearly 100 asteroid pairs.


(74144) 1998 QV77

Number: 74144
Designation: 1998 QV77
First Date: 2018/02/22
Points: 101
P1: 2.48
P1 error: 0.07
Max. Ampl.: 0.61


Lightcurve obtained from SARA South Observatory , Chile. Under EURONEAR project.

Amadeo Aznar Macías and Ovidiu Vaduvescu.

(36973) 2000 SY307


Number: 36973
Designation: 2000 SY307
First Date: 2018/10/08
Points: 150
P1: 2.98
P1 error: 0.07
Max. Ampl.: 0.29


Lightcurve obtained from TAR Telescope network, Observatorio del Teide, IAC. APT Observatories Group & IAC Solar System Group

(254145) 2004 PQ73

Number: 254145
Designation: 2004 PQ73
First Date: 2018/04/03
Points: 73
P1: 3.71
P1 error: 0.74
Max. Ampl.: 0.58


Lightcurve obtained from Isaac Newton Telescope, el Roque de los Muchachos, IAC. Under EURONEAR project.

Amadeo Aznar Macías and Ovidiu Vaduvescu.

Binary asteroid discovery IAU announcement


(1344) CAUBETA
B. Christmann, Soucieu-en-Jarrest, France; P. Pravec, K. Hornoch, H.
Kucakova, and P. Kusnirak, Ondrejov Observatory; D. Pray, Sugarloaf Mountain
Observatory, South Deerfield, MA, U.S.A.; V. Benishek, Belgrade Astronomical
Observatory; R. Montaigut and A. Leroy, OPERA Observatory, France; A. Marchini,
R. Papini, and F. Salvaggio, Dipartimento di Scienze Fisiche, Della Terra e
Dell’Ambiente, University of Siena; A. Aznar Macias, Astronomia Para Todos 
Observatories Group, Spain; and M. Serra-Ricart and J. Licandro, Instituto de
Astrofisica de Canarias, report that photometric observations obtained with a
0.20-m telescope at Soucieu-en-Jarrest, a 0.65-m telescope at Ondrejov
Observatory, a 0.50-m telescope at the Sugarloaf Mountain Observatory, a
0.35-m telescope at the Sopot Observatory in Serbia, a 0.20-m telescope at
the OPERA Observatory, a 0.30-m telescope at the Astronomical Observatory of
the University of Siena, and a 0.45-m telescope at Observatorio del Teide
during Feb. 17-Mar. 26 reveal that minor planet (1344) is a binary system
with an orbital period of 42.40 ± 0.03 hr. The primary shows a period of
3.12219 ± 0.00006 hr and has a lightcurve amplitude of 0.43 mag at solar
phases 5-9 deg. Mutual eclipse/occultation events that are 0.08 to 0.16
magnitude deep indicate a lower limit on the secondary-to-primary mean-
diameter ratio of 0.27. The mean absolute magnitude in the Cousins R
photometric system is H_R = 12.79 ± 0.06, assuming the phase relation slope
parameter G = 0.24 ± 0.11.

2019 June 3 (CBET 4634) Daniel W. E. Green» [2019-06-04 07:28, Ondrejov]



CCD photometric observations of the inner main-belt asteroid (20882) 2000 VH57 were made from 2018 Sept. 15 through Oct. 20. Analysis of the data showed that the asteroid is binary with a primary rotational period of 2.5586 hr and a satellite orbital period of 32.81 hr. Mutual eclipse/occultation events indicate a lower limit on the secondary-to-primary mean diameter ratio (Ds/Dp) of 0.23. During the period of observations, the primary and secondary lightcurves evolved as the viewing aspect changed. In particular, the depth of the secondary event increased significantly towards the end of the observations.



Photometric observations of the near-Earth asteroid (31345) 1998 PG by Pravec et al. (2000) found a rotation period of 2.51620 h. Also found was a secondary period of 7.0035 h, or the double-period of 14.007 h, possibly indicating an additional body in the system.

An extended campaign by the authors in 2018 lead to a similar primary period of 2.5168 h. However, instead of a 7-hour secondary period, one of about 16 hours was found with the lightcurve showing apparent mutual events (occultations and/or eclipses).

2017 BQ6

Designation: 2017 BQ6
Name: –
First Date: 2017/01/30
Points: 240
P1: 2.150 h.
P1 error: 0.001 h.
Max. Ampl.: 0.38 mag