Asteroids

2019SD8 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.876

Aphelion (Q)

2.646

Eccentricity (e)

0.503

Inclination (i)

3.7

deg

Orbit period (P)

853.4

Earth MOID

0.00362

U parameter

4.9

Next Earth close approach

Date

2026-10-10

Nominal distance (from Earth center)

0.04816

7205272

Maximum Brightness

25.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-09-30

Observatory

University of Arizona Catalina Sky 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

1.760801

1-sigma variation

0.000018

Unit

Eccentricity (e)

Value

0.502512

1-sigma variation

0.000006

Unit

Inclination (i)

Value

3.7236

1-sigma variation

3.126E-5

Unit

Long. of Ascending Node (Ω)

Value

5.2085

1-sigma variation

5.441E-6

Unit

Arg. of Perihelion (ω)

Value

54.5606

1-sigma variation

3.573E-5

Unit

Mean Anomaly (M)

Value

294.01978

1-sigma variation

0.01605

Unit

Perihelion distance

Value

0.875978

1-sigma variation

Unit

Aphelion distance

Value

2.645624

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.016833

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.859421

1-sigma variation

Unit

MOID

Value

0.003624

1-sigma variation

Unit

Orbit Period

Value

853.4219

1-sigma variation

Unit

U parameter

Value

4.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.41383E-10	1.07978E-10	5.51053E-10	5.70684E-11	1.82140E-10	-2.96502E-7
e	1.07978E-10	3.41634E-11	1.74440E-10	1.80914E-11	6.10773E-11	-9.37831E-8
i	5.51053E-10	1.74440E-10	9.77236E-10	1.21030E-10	3.13348E-10	-4.78617E-7
Ω	5.70684E-11	1.80914E-11	1.21030E-10	2.96076E-11	2.43687E-11	-4.95688E-8
ω	1.82140E-10	6.10773E-11	3.13348E-10	2.43687E-11	1.27650E-9	-1.58454E-7
M	-2.96502E-7	-9.37831E-8	-4.78617E-7	-4.95688E-8	-1.58454E-7	2.57521E-4

Date of computation: 2026-07-30 14:25 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

27.352

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

9 - 20*

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

Unit

Source

[1]

Unobserved

Value

2525

Unit

Source

[1]

Normalized RMS of residuals

Value

0.543072

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-09-22.381122

Unit

Source

[2]

Last Observation

Value

2019-10-01.059288

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

60 (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

2019-10-01

Unit

Source

[3]

Last Observation

Value

2019-10-01

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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

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 2019SD8 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	2005-09-15 03:56	55.9	0.1865081	0.1845097	0.0006661
EARTH	2012-09-24 13:19	89.8	0.0606343	0.0585901	0.0006814
MARS	2017-11-15 10:31	16.5	0.0341237	0.0337179	0.0001358
EARTH	2019-10-02 02:28	< 1 s	0.0035583	0.0035583	0.0000000
EARTH	2026-10-10 05:50	182.8	0.0481643	0.0464808	0.0005612
EARTH	2033-11-05 06:53	314.9	0.1116608	0.1110158	0.0002151
EARTH	2040-12-05 09:48	266.2	0.1173105	0.1169605	0.0001169
EARTH	2048-01-03 20:06	100.1	0.0697778	0.0693120	0.0001574
EARTH	2055-01-17 08:45	50.8	0.0985680	0.0975949	0.0003254
EARTH	2115-09-21 13:56	56.6	0.1302174	0.1284821	0.0005784
EARTH	2122-10-02 22:16	96.8	0.0078430	0.0068723	0.0003561
MARS	2123-03-20 10:59	33.1	0.0280270	0.0277369	0.0001035

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
328.98416959	264.81954070	0.00362406	MINIMUM
28.70405636	3.28044990	0.06247532	MINIMUM
0.44197606	316.81791388	0.12258288	SADDLE
179.67776461	134.86628522	1.63600485	SADDLE
358.74024186	133.91607886	1.88715109	SADDLE
179.51044391	314.77556137	3.63292889	MAXIMUM

Download:

MOID Plots

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