Asteroids

2019AS5 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.819

Aphelion (Q)

1.877

Eccentricity (e)

0.392

Inclination (i)

0.7

deg

Orbit period (P)

571.7

Earth MOID

0.00011

U parameter

5.9

Next Earth close approach

Date

2029-11-08

Nominal distance (from Earth center)

0.17205

25739043

Maximum Brightness

48.9

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

32.2

mag

Diameter

1.0 - 2.2*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-01-08

Observatory

University of Arizona Mt. Lemmon 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

1.348035

1-sigma variation

0.000045

Unit

Eccentricity (e)

Value

0.392338

1-sigma variation

0.000027

Unit

Inclination (i)

Value

0.7015

1-sigma variation

4.947E-5

Unit

Long. of Ascending Node (Ω)

Value

106.7670

1-sigma variation

4.805E-5

Unit

Arg. of Perihelion (ω)

Value

294.3386

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

296.13994

1-sigma variation

0.08747

Unit

Perihelion distance

Value

0.819150

1-sigma variation

Unit

Aphelion distance

Value

1.876920

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.002685

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.345527

1-sigma variation

Unit

MOID

Value

0.000107

1-sigma variation

Unit

Orbit Period

Value

571.6761

1-sigma variation

Unit

U parameter

Value

5.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.01424E-9	1.21131E-9	2.17985E-9	7.24630E-10	-9.69947E-9	-3.92552E-6
e	1.21131E-9	7.28507E-10	1.31224E-9	4.43846E-10	-5.85073E-9	-2.36071E-6
i	2.17985E-9	1.31224E-9	2.44703E-9	1.15195E-9	-1.10549E-8	-4.24827E-6
Ω	7.24630E-10	4.43846E-10	1.15195E-9	2.30870E-9	-6.64670E-9	-1.41223E-6
ω	-9.69947E-9	-5.85073E-9	-1.10549E-8	-6.64670E-9	5.27883E-8	1.89029E-5
M	-3.92552E-6	-2.36071E-6	-4.24827E-6	-1.41223E-6	1.89029E-5	7.65038E-3

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

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

32.184

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

1.0 - 2.2*

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

[-]

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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

Unit

Source

[1]

Unobserved

Value

2751

Unit

Source

[1]

Normalized RMS of residuals

Value

0.554131

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-01-08.35867

Unit

Source

[2]

Last Observation

Value

2019-01-11.487437

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

20 (0)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

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 2019AS5 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	1966-01-01 17:30	1164.7	0.0582012	0.0380649	0.0067130
EARTH	1976-01-15 05:04	898.4	0.1062416	0.0721697	0.0113581
EARTH	1978-08-08 06:24	715.9	0.1425253	0.1179007	0.0086928
EARTH	1988-08-17 18:28	802.2	0.0999537	0.0891990	0.0042631
EARTH	2008-12-02 13:12	> 1 d	0.1640429	0.1584828	0.0018590
EARTH	2019-01-08 00:36	< 1 min	0.0001007	0.0001007	0.0000000
EARTH	2029-11-08 05:36	> 1 d	0.1720549	0.1710050	0.0003500
EARTH	2040-08-29 00:39	1307.5	0.0507300	0.0325585	0.0061061
EARTH	2051-08-12 00:06	35.4	0.1707805	0.1692309	0.0005166
EARTH	2055-01-09 09:08	312.1	0.0136908	0.0053631	0.0027761
EARTH	2062-08-13 07:24	> 1 d	0.1583544	0.0230461	0.0454968
EARTH	2066-01-17 12:45	> 1 d	0.1333324	0.0005715	0.0638604
EARTH	2073-08-20 14:04	> 1 d	0.0469681	0.0086056	0.0808147
EARTH	2084-08-21 08:12	> 1 d	0.0357584	0.0086025	0.0767127
EARTH	2088-01-21 21:34	> 1 d	0.1922046	0.0659780	0.0420756
EARTH	2095-08-14 01:19	> 1 d	0.1560965	0.0084151	0.0543200
EARTH	2099-01-14 02:52	> 1 d	0.0640873	0.0006858	0.0923195
EARTH	2110-01-09 13:52	> 1 w	0.0031797	0.0004203	0.0785576
EARTH	2126-09-12 09:11	> 1 mo	0.1113804	0.0072111	72.7665964

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
46.46584341	5.74069931	0.00012899	MINIMUM
309.38430762	229.35617377	0.00849861	MINIMUM
357.45145459	297.02154770	0.17379238	SADDLE
178.89492410	118.61139728	0.86787440	SADDLE
357.44800889	117.03317483	1.82795887	SADDLE
178.92422067	298.63856433	2.86917911	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2019AS5

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2081-01-07.689	81136.689	-1.684	0.25 ± 0.000	3.71E7	7.73E-9	5.17E-5	-11.77
2085-01-07.764	82597.764	3.932	1.45 ± 0.000	9.40E4	1.17E-9	5.16E-5	-12.62
2121-09-05.921	95986.921	0.114	0.13 ± 0.004	7.97E6	1.47E-7	5.18E-5	-10.72


Based on 20 optical observations (of which 0 are rejected as outliers) from 2019/01/08.359 to 2019/01/11.487.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.49 and 1.49 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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