The last asteroid of 2011 was 2011 YX69, recognized when I was able to isolate an unknown asteroid close to the asteroid 2011 YP15, also discovered by me. The first steps were full of confusion between the two objects, and when the Minor Planet Center established the orbit of 2011 YP15, I identified the unknown object, which on January 8, 2012 has been designated as Main-belter 2011 YX69 with absolute magnitude 16.7
Discovered from Santa Maria de Montmagastrell the asteroids 2011 YP15 - 2011 YV14 - 2011 YW14 - 2011 YD19 - 2011 YH21 - 2011 YJ21 the nigths of December 25-26-27, 2011 in magnitudes from 19.8 to 21,6. The asteroid 2011 YW14 is an Outer Maint-belt asteroid with absolute magnitude 16.6 (H).
The MPC announces on December 21 the discovery of two new Main-belt asteroids from Santa Maria: 2011 YN2 and 2011 YO2 in 20,5 and 21,6 magnitude the nigth on December 18-19, both confirmed by the discoverer the next nights. The asteroid 2011 YN2 is an Outer Maint-belt asteroid with absolute magnitude H = 17.1.
The MPC announces on December 20 the discovery of two new Main-belt asteroids from Santa Maria: 2011 YC2 and 2011 YD2 in magnitude 20,5 and 21,6 the nigth on December 18-19, both confirmed by the discoverer the next night. Also at same time has assigned the Outer Maint-belt asteroid 2011 XM3 with absolute magnitude 16.6 discovered from Santa Maria Observatory in images taken on December 15 and confirmed on December 19.
The MPC has assigned on December 19 the Jupiter's Trojan asteroid 2011 YP (in the Langrangian point L4) found comfortably sitting on my desk at 19.4 magnitude in images taken on December 16 and confirmed by me after three days. A Trojan is a minor planet that shares an orbit with a larger planet, but does not collide with it because it orbits around one of the two Langrangian points of stability L4 and L5, which lie approximately 60° ahead of and behind the planet, respectively. All the asteroids at the leading point L4 have names corresponding to participants on the Greek side of the Trojan War (Achilles group), except for 624 Hektor, which was named before this naming convention was instituted. Correspondingly, 617 Patroclus is a Greek-named asteroid at the Trojan camp L5, as those at the L5 point are named after the heroes of Troy. Trojan objects are one type of co-orbital object.
Earth's first Trojan Asteroid
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| Trojan points are the points labelled L4 and L5, highlighted in red, on the orbital path of the secondary object (blue), around the primary object (yellow) |
After a November rain and very foggy, which I have not found anything, the MPC announces the discovery of two new asteroids from Santa Maria: 2011 XR1 and 2011 XS1 in magnitude 20,4 and 21,0 the nigth on December 5-6, both confirmed by the author the next night.
Discoveries on October: 2011 TD (306364) - 2011 TF18 - 2011 TT - 2011 TM2 - 2011 TQ4 - 2011 TR4 - 2011 TS4 - 2011 UR - 2011 UM10 - 2011 UN10 - 2011 UO10 - 2011 UP10 - 2011 UL37 - 2011 UY59 - 2011 UQ264
Discovered the asteroid 2011 UL37 in magnitude 18.9 on October 19 and the asteroid 2011 UY59 in magnitude 20.0 on October 20, both confirmed by the author the next nights. On October 24 the MPC has found that 2011 UL37 (main designation) is 2011 NJ102 with two oppositions.
Discovered from Santa Maria de Montmagastrell the asteroids 2011 UM10 - 2011 UN10 - 2011 UO10 - 2011 UP10 the nigth of October 18-19. The object 2011 UN10 is the secondary designation of the Mars-crossing asteroid with two oppositions dicovered in 2004 as 2004 PE49 and means the discovery number 50 from MPC B74. The 2011 UO10 is 2000 TO16 with two oppositions: main designation for 2011 UO10 remains. The 2011 UP10 is a Outer Main-belt asteroid with a period of 5,87 years and absolute magnitude H = 17.
Rediscovered away from the opposition on October 16 the asteroid 2007 GO62 which was lost after five competitions. The rediscovery has obtained the secondary designation 2011 UR.
The MPC has assigned on October 5, 2011 the Main-belt asteroids 2011 TQ4 - 2011 TR4 and the Mars-crossing asteroid 2011 TS4 found at 20.2 - 20.7 - 20.7 magnitude, respectively, in images taken on September 3 and confirmed by the author the next night.
The MPC has assigned on October 4, 2011 the Main-belt asteroid 2011 TM2 found comfortably sitting on my desk at 21.1 magnitude in images taken on September 2. Was confirmed by the author the next night.
The MPC has assigned on October 3, 2011 the Main-belt asteroids 2011 TD and 2011 TT found at 20.5 and 21 magnitude, respectively, in images taken on September 1 and 2 and confirmed by the author both the next night. 2011 TD has been numbered as 306364 on November 11, 2011; the discovery is assigned to Santa Maria Observatory. The asteroid 2011 TT was found in distant opposition (H = 16.8).
Discoveries on September: 2011 RB1 - 2011 RC1 (310163)- 2011 SW25 (306283) - 2011 SD64 - 2011 SG67 - 2011 SH67 - 2011 SQ69 - 2011 SG102 - 2011 SE120 - 2011 SF120 - 2011 SG120 - 2011 SH120 - 2011 SW120 - 2011 SY166 - 2011 SN176
The MPC has assigned on September 29, 2011 the Main-belt asteroids 2011 SY166 and 2011 SN176 found at 20.6 and 21,3 magnitude, respectively, in images taken on September 27 and 28 and confirmed by the author both the next night. On October, 2 the MPC has found that asteroid 2011 SY166 is also 1997 WR29 and 2006 QM73 with four oppositions. Main designation for 2011 SY166 remains.
The MPC has assigned on September 29, 2011 the 2011 SW120 found at 20.9 magnitude in images taken on September 27 and confirmed by the author the next night.
The MPC has assigned on September 28, 2011 the Main-belt asteroids 2011 SE120 - 2011 SF120 - 2011 SG120 - 2011 SH120 found at 20.2 - 20.9 - 21.1 - 21.1 magnitudes, respectively, in images taken on September 26 and confirmed by the author the next night.
The MPC has assigned on September 27, 2011 the Main-belt asteroid 2011 SG102 found at 20.6 magnitude in images taken on September 25 and confirmed by the author the next night. On October 5 the MPC has found that 2011 SG102 is also 2010 CM156 with two oppositions. Main designation for 2011 SG102 remains.
The MPC has assigned on September 26, 2011 the Main-belt asteroid 2011 SQ69 found at 20.7 magnitude in images taken on September 24 and confirmet by the author the next night.
The MPC has assigned on September 26, 2011 the Main-belt asteroids 2011 SG67 and 2011 SH67 found at 20.8 and 20.5 magnitude, respectively, in images taken on September 22 and confirmed by the author two nights later.
The MPC has assigned on September 25, 2011 the Main-belt asteroid 2011 SD64 found at 20.5 magnitude in images taken on September 23 and confirmed by the author the next night.
The MPC has assigned on September 23, 2011 the Main-belt asteroid 2011 SW25 found at 20 magnitude in images taken on September 21 and confirmed by the author the next night. On November 11, 2011 has been numbered as 306283 .
The MPC has assigned on September 7, 2011 two new discoveries: 2011 RB1 and 2011 RC1 found at 20.4 and 20.3 magnitude, respectively, in images taken on September 6 and confirmed the next night. The 2011 RB1 is a Main-belt asteroid and 2011 RC1 is a Outer Main-belt asteroid. On September 22 the MPC has found that 2011 RC1 is also 2010 FA50 with four oppositions (U = 1). Main designation for 2011 RC1 remains and has been numbered as 310163. On October 3 the MPC has found that 2011 RB1 was discovered in 2002 and is on the second opposition.
Discoveries on August: asteroid 2011 QU20
The asteroid 2011 QU20 was discovered from my desk on February 3, 2013 in images taken on August 21, 2011
Discovery on April: asteroid 2011 GE55
The MPC has assigned on April 6, 2011 a discovery of 2011 GE55 wich minimum Earth ditance is 0.92306 AU, found at 21 magnitude in images taken on April 4. This asteroid probably also belongs to the Flora family beacause it has 2.1 < a < 2.3, i < 11, orbiting near Mars.
Discoveries on March: asteroids 2011 FE29 - 2011 FL29 (279260)- 2011 EU68 - 2011 EW54
The MPC has assigned on Mars 14, 2011 a new discovery: 2011 EW54 in 19.9 magnitude, found in images taken on February 11. After two consecutive nights measuring this object, on March 24, 2011 the MPC has found it five oppositions.
The asteroid 2011 EU68 was discovered from my desk on February 5, 2013 in images taken on February 25, 2011.
The MPC has assigned on April 1, 2011 two new discoveries: 2011 FE29 and 2011 FL29 found at 20 magnitude in images taken on March 30. The asteroid 2011 FL29 is the 2009 VX65=2009 VN60=1999 FK96 with four oppositions. The asteroid 2011 FL29 has been numbered as 279260 on May, 2011.
The asteroid 2011 FE29 is a Main-belt asteroid and was discovered two nights before by Antonio Garrigós (MPC B37) from l'Ametlla del Vallès, who asked me if I could confirm the discovery. Surprisingly, the MPC gave me the discovery instead of him. The MPC has announced on April 5 that 2011 FE29 corresponds to 2005 PZ13 with three oppositions. This asteroid probably belongs to the Flora family beacause it has 2.1 < a < 2.3, i < 11, orbiting near MarsEarth MOID = 0,71069 AU.
The MPC has assigned on Mars 14, 2011 a new discovery: 2011 EW54 in 19.9 magnitude, found in images taken on February 11. After two consecutive nights measuring this object, on March 24, 2011 the MPC has found it five oppositions. Absolute magnitude (H) = 16.2.
Discoveries on February: asteroids 2011 DG24 and 2011 CF71
The MPC has assigned on Mars 3, 2011 a new discovery: 2011 DG24 in 20.4 magnitude, found in images taken on February 24 and confirmed by MPC G89 and Bernd Häusler form Maidbron (Germany). Minimum Earth Ditance is 0.85489 AU. This asteroid probably belongs to the Flora family beacause it has 2.1 < a < 2.3, i < 11, orbiting near Mars.
Discoveries on January: asteroid 2011 AS19
The MPC has assigned on January 11, 2011 a new discovery: 2011 AS19 in 20.9 magnitude, found in images taken on January 10 and confirmed by the author in observations on the next night. The MPC announced on February 2 that 2011 AS19 is also 2002 EH37 and 2009 SM210 with three oppositions. Main designation for 2011 AS19 remains.
