Asteroids

2012LZ1 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.053

Aphelion (Q)

4.068

Eccentricity (e)

0.589

Inclination (i)

26.1

deg

Orbit period (P)

1496.4

Earth MOID

0.04834

U parameter

0.5

Next Earth close approach

Date

2053-06-08

Nominal distance (from Earth center)

0.14435

21595181

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.8

mag

Diameter

800

Taxonomic type

Rotation period (T)

12.87

Discovery Information

Discovery Date

2012-06-10

Observatory

Siding Spring Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.560328

1-sigma variation

5.135E-8

Unit

Eccentricity (e)

Value

0.588733

1-sigma variation

1.680E-8

Unit

Inclination (i)

Value

26.0679

1-sigma variation

9.283E-6

Unit

Long. of Ascending Node (Ω)

Value

264.4971

1-sigma variation

1.609E-6

Unit

Arg. of Perihelion (ω)

Value

14.3562

1-sigma variation

3.238E-5

Unit

Mean Anomaly (M)

Value

148.16804

1-sigma variation

0.00004

Unit

Perihelion distance

Value

1.052978

1-sigma variation

Unit

Aphelion distance

Value

4.067677

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.049474

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.909326

1-sigma variation

Unit

MOID

Value

0.048337

1-sigma variation

Unit

Orbit Period

Value

1496.3795

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.63635E-15	6.37255E-16	6.48947E-14	5.36497E-15	4.36914E-13	-2.04777E-12
e	6.37255E-16	2.82321E-16	6.01827E-14	3.74697E-16	4.17119E-13	-5.30708E-13
i	6.48947E-14	6.01827E-14	8.61804E-11	7.87524E-12	7.98421E-11	-5.98466E-11
Ω	5.36497E-15	3.74697E-16	7.87524E-12	2.58902E-12	1.16311E-12	-4.48883E-12
ω	4.36914E-13	4.17119E-13	7.98421E-11	1.16311E-12	1.04825E-9	-4.52623E-10
M	-2.04777E-12	-5.30708E-13	-5.98466E-11	-4.48883E-12	-4.52623E-10	1.60380E-9

Date of computation: 2026-06-04 23:11 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

12.87

Unit

Source

[4]

Quality

Value

Unit

Source

[4]

Amplitude

Value

0.28

Unit

mag

Source

[4]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[1]

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.43

19.771

Unit

mag

Source

[1]

[5]

Slope Parameter (G)

Value

0.05

0.15**

Unit

Source

[1]

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.0124

0.047

Unit

Source

[6]

[2]

Diameter

Value

800

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.39

0.41

0.73

Unit

V-R

R-I

B-V

Source

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[7]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Hicks, M. et al. (2012) href="http://www.astronomerstelegram.org/?read=4252"> ATel#4252 (Broadband Photometry of 2012 LZ1: A Large, Dark Potentially Hazardous Asteroid)
[2]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Warner, B.D. et al. (2012) MPB 39, 252-253. (LIGHTCURVE FOR NEA 2012 LZ1) 2.) Hicks, M. et al. (2012) href="http://www.astronomerstelegram.org/?read=4252"> ATel#4252 (Broadband Photometry of 2012 LZ1: A Large, Dark Potentially Hazardous Asteroid)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[7]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

3028

Unit

Source

[1]

Unobserved

Value

2097

Unit

Source

[1]

Normalized RMS of residuals

Value

0.394763

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-06-10.70333

Unit

Source

[2]

Last Observation

Value

2020-09-25.108748

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

717 (5)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2012-06-19

Unit

Source

[3]

Last Observation

Value

2012-06-19

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

4 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Filters

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Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Computation parameters

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Initial Date: *

Final Date: *

Output option:

One line per time step

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2012LZ1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	2012-06-14 23:07	< 1 s	0.0364149	0.0364148	0.0000000
EARTH	2053-06-08 10:40	< 1 min	0.1443549	0.1443334	0.0000071
EARTH	2106-06-07 14:40	< 1 min	0.1192473	0.1192278	0.0000065
EARTH	2110-06-30 09:47	< 1 min	0.1507659	0.1507503	0.0000052

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
353.27971705	163.96071539	0.04471287	MINIMUM
2.26722795	0.17930632	2.03050627	SADDLE
181.22961162	356.69054095	3.09184357	SADDLE
179.30546075	175.80584509	5.08081425	MAXIMUM

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MOID Plots

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