Asteroids

2019LZ4 help

Last update: 2026-01-19 12:46 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.827

Aphelion (Q)

2.048

Eccentricity (e)

0.425

Inclination (i)

2.0

deg

Orbit period (P)

629.4

Earth MOID

0.00101

U parameter

0.0

Next Earth close approach

Date

2038-03-16

Nominal distance (from Earth center)

0.16653

24913246

Maximum Brightness

31.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.5

mag

Diameter

30 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-06-08

Observatory

Palomar Mountain--ZTF

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.437267

1-sigma variation

4.222E-9

Unit

Eccentricity (e)

Value

0.424782

1-sigma variation

4.964E-8

Unit

Inclination (i)

Value

2.0162

1-sigma variation

4.275E-6

Unit

Long. of Ascending Node (Ω)

Value

254.7016

1-sigma variation

8.910E-6

Unit

Arg. of Perihelion (ω)

Value

293.6670

1-sigma variation

8.889E-6

Unit

Mean Anomaly (M)

Value

297.55998

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.826742

1-sigma variation

Unit

Aphelion distance

Value

2.047791

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.009427

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.433728

1-sigma variation

Unit

MOID

Value

0.001008

1-sigma variation

Unit

Orbit Period

Value

629.3677

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.78251E-17	-2.08399E-16	1.56680E-14	1.93807E-14	2.81529E-14	-3.50820E-14
e	-2.08399E-16	2.46383E-15	-1.86155E-13	-2.33672E-13	-3.29763E-13	4.12201E-13
i	1.56680E-14	-1.86155E-13	1.82747E-11	2.72280E-11	1.70119E-11	-3.18748E-11
Ω	1.93807E-14	-2.33672E-13	2.72280E-11	7.93917E-11	-1.15869E-11	-4.58922E-11
ω	2.81529E-14	-3.29763E-13	1.70119E-11	-1.15869E-11	7.90153E-11	-5.14705E-11
M	-3.50820E-14	4.12201E-13	-3.18748E-11	-4.58922E-11	-5.14705E-11	7.08633E-11

Date of computation: 2026-01-19 12:46 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

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

24.452

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

30 - 80*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2416

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.511008

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-06-08.191026

Unit

Source

[2]

Last Observation

Value

2026-01-18.356377

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

369 (10)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2019LZ4 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	1960-01-17 23:22	2.4	0.0736443	0.0735688	0.0000252
EARTH	1965-03-30 00:35	3.3	0.1796153	0.1796149	0.0000002
EARTH	1970-06-10 23:41	3.9	0.0472171	0.0471120	0.0000351
EARTH	1987-01-24 14:04	< 1 min	0.0292716	0.0292647	0.0000023
EARTH	1992-04-27 20:23	2.8	0.1559252	0.1559190	0.0000021
EARTH	2014-03-09 06:43	< 1 min	0.1644485	0.1644473	0.0000004
EARTH	2019-06-07 18:04	< 1 s	0.0034946	0.0034946	0.0000000
EARTH	2026-01-22 18:19	< 1 min	0.0458099	0.0458096	0.0000001
EARTH	2038-03-16 08:37	< 1 min	0.1665348	0.1665346	0.0000001
EARTH	2050-05-20 05:15	< 1 min	0.1058800	0.1058776	0.0000008
EARTH	2062-06-16 14:57	< 1 min	0.1156392	0.1156365	0.0000009
EARTH	2069-01-27 09:12	< 1 min	0.0305450	0.0305444	0.0000002
EARTH	2081-04-10 07:03	< 1 min	0.1726569	0.1726565	0.0000001
EARTH	2093-06-13 04:27	< 1 min	0.0661655	0.0661630	0.0000008
MARS	2098-02-15 18:55	< 1 min	0.0344984	0.0344982	0.0000001
EARTH	2100-02-03 00:19	< 1 min	0.0626457	0.0626455	0.0000000
EARTH	2112-05-31 17:48	< 1 min	0.0600930	0.0600904	0.0000008
EARTH	2119-01-22 04:57	< 1 min	0.0781442	0.0781408	0.0000011

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
46.42073615	154.67090451	0.00100840	MINIMUM
317.58680115	23.82164915	0.02689896	MINIMUM
2.21582184	89.36479545	0.17582281	SADDLE
180.97727442	268.18191454	1.04738178	SADDLE
2.52365639	269.84906198	1.82768465	SADDLE
181.05020393	88.22777172	3.04744103	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out