![]() Radar image of 2012 LZ1 by the
Arecibo Observatory in 2012 | |
Discovery [1] | |
---|---|
Discovered by | Robert H. McNaught |
Discovery site | Siding Spring Survey |
Discovery date | 10 June 2012 |
Designations | |
2012 LZ1 | |
Orbital characteristics [2] | |
Epoch 13 January 2016 ( JD 2457400.5) | |
Uncertainty parameter 2 | |
Aphelion | 4.0667 AU (608.37 Gm) (Q) |
Perihelion | 1.0492 AU (156.96 Gm) (q) |
2.5579 AU (382.66 Gm) (a) | |
Eccentricity | 0.58984 (e) |
4.09 yr (1494.3 d) | |
312.53 ° (M) | |
0° 14m 27.312s / day (n) | |
Inclination | 26.102° (i) |
264.53° (Ω) | |
14.241° (ω) | |
Earth MOID | 0.043164 AU (6.4572 Gm) |
Jupiter MOID | 1.1348 AU (169.76 Gm) |
Physical characteristics | |
Dimensions | ~1 km [3] |
12.87 h (0.536 d) | |
10–15 hr [3] | |
0.02–0.04 [3] | |
19.9 [2] | |
2012 LZ1 is an asteroid classified as near-Earth object and potentially hazardous asteroid of the Amor group, approximately 1 km (0.62 mi) in diameter. [4] It passed within 5.4 million kilometers (14 lunar distances) of Earth on 14 June 2012. [4] It was discovered during the night of 10–11 June 2012 by astronomer Robert H. McNaught and his colleagues using the 0.5-meter Uppsala Southern Schmidt Telescope at the Siding Spring Observatory in Australia, just four days before its closest approach to Earth. [5] [6]
Arecibo radar observations on 19 June 2012 have shown that 2012 LZ1 is about 1 kilometre (0.62 mi) in diameter and that 2012 LZ1 has zero chance of impacting the Earth for at least the next 750 years. [3]
A small change of trajectory caused by Earth's gravity was predicted from the 2012 passby. [7] The Slooh Space Camera streamed live footage of the passby over the Internet. [6] McNaught and Astronomy magazine columnist Bob Berman hosted the broadcast. [5] "We love it when stuff like this happens, because it's fun to do and the public appreciates it", said Slooh president Patrick Paolucci. [7] The asteroid was the same brightness as a 13th- magnitude star, too faint to be seen by the naked eye or a low-end telescope. [5] [7]
The next passby for 2012 LZ1 was 27 July 2016 at 0.5 AU (75,000,000 km; 46,000,000 mi) from Earth. [7] [8]
![]() Radar image of 2012 LZ1 by the
Arecibo Observatory in 2012 | |
Discovery [1] | |
---|---|
Discovered by | Robert H. McNaught |
Discovery site | Siding Spring Survey |
Discovery date | 10 June 2012 |
Designations | |
2012 LZ1 | |
Orbital characteristics [2] | |
Epoch 13 January 2016 ( JD 2457400.5) | |
Uncertainty parameter 2 | |
Aphelion | 4.0667 AU (608.37 Gm) (Q) |
Perihelion | 1.0492 AU (156.96 Gm) (q) |
2.5579 AU (382.66 Gm) (a) | |
Eccentricity | 0.58984 (e) |
4.09 yr (1494.3 d) | |
312.53 ° (M) | |
0° 14m 27.312s / day (n) | |
Inclination | 26.102° (i) |
264.53° (Ω) | |
14.241° (ω) | |
Earth MOID | 0.043164 AU (6.4572 Gm) |
Jupiter MOID | 1.1348 AU (169.76 Gm) |
Physical characteristics | |
Dimensions | ~1 km [3] |
12.87 h (0.536 d) | |
10–15 hr [3] | |
0.02–0.04 [3] | |
19.9 [2] | |
2012 LZ1 is an asteroid classified as near-Earth object and potentially hazardous asteroid of the Amor group, approximately 1 km (0.62 mi) in diameter. [4] It passed within 5.4 million kilometers (14 lunar distances) of Earth on 14 June 2012. [4] It was discovered during the night of 10–11 June 2012 by astronomer Robert H. McNaught and his colleagues using the 0.5-meter Uppsala Southern Schmidt Telescope at the Siding Spring Observatory in Australia, just four days before its closest approach to Earth. [5] [6]
Arecibo radar observations on 19 June 2012 have shown that 2012 LZ1 is about 1 kilometre (0.62 mi) in diameter and that 2012 LZ1 has zero chance of impacting the Earth for at least the next 750 years. [3]
A small change of trajectory caused by Earth's gravity was predicted from the 2012 passby. [7] The Slooh Space Camera streamed live footage of the passby over the Internet. [6] McNaught and Astronomy magazine columnist Bob Berman hosted the broadcast. [5] "We love it when stuff like this happens, because it's fun to do and the public appreciates it", said Slooh president Patrick Paolucci. [7] The asteroid was the same brightness as a 13th- magnitude star, too faint to be seen by the naked eye or a low-end telescope. [5] [7]
The next passby for 2012 LZ1 was 27 July 2016 at 0.5 AU (75,000,000 km; 46,000,000 mi) from Earth. [7] [8]