Planetary Radar at Arecibo Observatory

list of planets Mercury Asteroids Jupiter Saturn Comets

Click on an object in the solar system or choose from the list at left to learn more



What Asteroids are Visible NOW?

What Asteroids are Visible This Month?

What NHATS Targets are Coming Up?

Current NEO target proposal (high SNR)

Current NEO target proposal (med SNR)


Recently Observed Asteroids:

All Detections in 2014 - most recent first

(163132) 2002 CU11
2014 QY33
(276049) 2002 CE26
(285944) 2001 RZ11
2013 WT67
(398188) 2010 LE15
12 Victoria
(177049) 2003 EE16
(13651) 1997 BR
2013 XM24
2010 NY65
(154275) 2002 SR41
1994 CJ1
(139359) 2001 ME1
(308242) 2005 GO21
2014 LK21
1943 Anteros- Very marginal detection
2014 HQ124 - Observations included Arecibo monostatic, Arecibo-to-VLBA bistatic speckle tracking, and the FIRST Goldstone-to-Arecibo bistatic chirp imaging!
2014 JL25
246 Asporina
2035 Stearns
2014 KF22
2010 UQ7
2008 WK32
Comet 209P/LINEAR - Direct imaging of a comet nucleus!
(188174) 2002 JC
(267337) 2001 VK5
(242708) 2005 UK1
2011 JR13
(21374) 1997 WS22
(387816) 2004 FM17
2014 HT46 - Line-of-sight range correction of more than one Earth radius!
2014 HM4
2013 JX28
2003 HM
(304330) 2006 SX217
288 Glauke
(387733) 2003 GS
2014 FS52
(363599) 2004 FG11 - Binary, discovered by Arecibo in 2012!
2014 GP17
2014 GO17
2009 FD
(143469) 2003 QQ47
2013 WT44 - Found to be a binary system by Goldstone!
2014 FO38
2014 EQ12
2014 EY24 - Line-of-sight range correction of almost one Earth radius!
2014 AY28
2014 EL45 - Line-of-sight range correction of almost one Earth diameter!
(357622) 2005 EY95
(275677) 2000 RS11 - Very oddly shaped contact binary much like Mithra!
2014 DJ23
2014 AD16
2013 YZ13
2062 Aten - Detected for the third time in 3 years
2010 XZ67 - First detected in Dec 2013


Upcoming Radar Targets:

Asteroid Dates Expected
Results
IRTF
Target?
H mag Request Optical
Astrometry?
Request Optical
Lightcurve?
Request Optical
Characterization?
Notes
2003 EG16 Aug 18 Astrometry 19.2 PHA, period unknown
2013 WT67 Aug 20-23 High-res Imaging 18.0 Y Y PHA, period unknown
(285944) 2001 RZ11 Aug 20-24 High-res Imaging 16.4 Y Y Period unknown
(163132) 2002 CU11 Aug 28-29 High-res Imaging 18.3 Y Y PHA, period unknown, speckle
(276049) 2002 CE26 Aug 26-05 High-res Imaging 16.8 Y Y BINARY (TRIPLE?), 3.3-h period, C type
(333579) 2006 KM103 Sep 06-15 Imaging 20.0 Y PHA, period unknown
(175114) 2004 QQ Sep 18 Astrometry 16.4 Period unknown
(299582) 2006 GQ2 Sep 25 Astrometry 18.0 Period unknown
2009 FG19 Sep 25-27 Imaging 17.9 Y PHA, period unknown
2008 OB9 Oct 02 Astrometry 17.5 PHA, period unknown
2012 TS Oct 03 Astrometry 20.8 Period unknown
(68267) 2001 EA16 Oct 08-17 Imaging 16.8 Y Period unknown
2340 Hathor Oct 13-30 High-res Imaging 20.0 Y Y PHA, period unknown, Sq type
2012 KY3 Oct 20 Astrometry 18.6 PHA, period unknown
(36017) 1999 ND43 Oct 30 Astrometry 19.1 11.4-h period, Sl type
(163818) 2003 RX7 Nov 07 Astrometry 18.4 PHA, 2.6-h period
(85713) 1998 SS49 Nov 21 Astrometry 15.6 PHA, period unknown
(393908) 2005 UH3 Nov 23-30 Imaging 16.4 Y Period unknown
(214088) 2004 JN13 Dec 03-12 Imaging 15.0 Y Period unknown
(345705) 2006 VB14 Dec 12 Astrometry 18.5 3.25-h period
(204131) 2003 YL Dec 04-23 Imaging 19.8 Y Period unknown
2001 XY10 Dec 21 Astrometry 19.1 Period unknown, Sk class
2005 YQ96 Dec 26-31 High-res Imaging 20.4 Y Y PHA, period unknown
2007 EC Jan 06 Astrometry 16.4 2 deg! NHATS, period unknown
2007 EJ Jan 07 Astrometry 18.1 Period unknown
(357439) 2004 BL86 Jan 27 High-res Imaging 18.9 4' Y Y PHA, period unknown

Requests for Optical Observations:

Astrometry: optical astrometry is specifically requested for objects with plane-of-sky pointing uncertainties of tens of arcseconds or more.
Lightcurves: optical lightcurves and period estimates are specifically requested for objects that will produce high-resolution images (i.e., possible shape models), for targets of IRTF thermal observations, for candidate binary asteroids, and for potential human-exploration targets.
Characterization: optical characterization refers to spectra and colors, which are most important for targets of IRTF thermal observations, for completeness of the strongest radar targets, for candidate binary asteroids, and for potential human-exploration targets.


All Detections in 2013

3752 Camillo
99942 Apophis
2013 CZ87
2008 DG17
785 Zwetana
2013 EC20
1993 UC - Found to be a binary system!
14 Irene
2009 SC15
2013 EA
2008 SE85
2001 TA2
29 Amphitrite
2013 FY13
2013 GJ69
(232643) 2005 NZ6
2013 GR38
(360191) 1988 TA
2010 VA1
(137199) 1999 KX4
(152756) 1999 JV3
(163249) 2002 GT - Would have been the target of a Deep Impact flyby (RIP)
2013 JB36
(285263) 1998 QE2 - Found to be a binary system (first detected by Goldstone)!
2004 KH17
2013 LB2 - Line-of-sight range correction of almost 2 Earth radii!
2013 JR28
2013 LL25
1627 Ivar
2013 LC7
(340666) 2006 RO36
(17188) 1999 WC2
(363790) 2005 JE46
2062 Aten
(153349) 2001 PJ9
(7753) 1988 XB
2003 DZ15
(277475) 2005 WK4
2013 QR1
2013 PR43
2009 WH106
2010 CF19
2007 CN26
(52760) 1998 ML14
(232691) 2004 AR1
(363305) 2002 NV16
329 Bamberga
2013 HG20
(329437) 2002 OA22
89 Julia
(152664) 1998 FW4
2013 QN11
(24445) 2000 PM8
2013 RH74
6063 Jason
712 Boliviana
2013 VO5
2013 VJ11
2011 JY1
216 Kleopatra
572 Rebekka
161 Athor
(138095) 2000 DK79 - Found to be a binary system!
1997 WQ23
(85774) 1998 UT18
2013 UF3
2001 AV43
2010 CL19
64 Angelina
2009 WZ104
2006 CT
2013 XZ9
2013 XY8
2013 XA4
2013 NJ
2013 XG10
2013 XH22
2013 XX8
2010 XZ67


Arecibo Observatory Discovers a near-Earth triple asteroid system

The Arecibo Planetary Radar discovered that near-Earth Asteroid 2001 SN263 is a triple asteroid system.

Division of Planetary Sciences resolution on the Arecibo planetary radar

The Division of Planetary Sciences of the American Astronomical Society unanimously passed a resolution on the status of Arecibo radar.

"One-page" description of the Arecibo planetary radar

We have prepared a one-page informational flyer that may be useful as a handout to interested parties.

Asteroid Dynamics Workshop

The Arecibo Asteroid Dynamics Workshop was held 2003 Feb 2-4 at Arecibo Observatory. Click Here for the workshop web site.


First Near-Earth Asteroid Satellite System: 2000 DP107


2000 DP107 was the first asteroid identified by radar as a binary system. The primary is roughly spherical with a diameter of 800 meters (a half mile) and the smaller secondary, which orbits it in 1.8 days, is about 300 meters (1000 feet).

The primary has a low density of 1.7 and is assumed to be a "rubble pile" of rocks and voids. It is spinning at a rate near the breakup point for strengthless bodies, and therefore any slight gravitational disturbance can pull it apart. Probably an encounter with the gravity of a planet created the binary by pulling apart the primary.

Four more binary systems have been discovered by radar among the near-Earth asteroids, making one of every 6 a binary.

Binary asteroid 2000 DP107


A composite of images of 2000 DP107 obtained at Arecibo Observatory in September-October 2000. The frame is 5.8 km vertically, with distance from the observer increasing downward, and 12.2 Hz horizontally, with Doppler frequency or line-of-sight velocity increasing to the right. Rotation and revolution are counterclockwise.

The illuminated front of a roughly spherical primary is visible, as well as a secondary at different phases of the orbital cycle. In this image the secondary appears much smaller than the primary because its spin rate is lower. The actual size ratio is 8 to 3. Also, the orbit appears elliptical in this image but it is circular in space.

More on 2000 DP107:  
Margot web page Klet Observatory optical data IAU Circular #7496 IAU Circular #7503 Table from NeoDys,  Orbit diagram from JPL  


Last modified by Alice 23 apr 02