Asteroids

2019FB1 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.967

Aphelion (Q)

2.558

Eccentricity (e)

0.451

Inclination (i)

3.8

deg

Orbit period (P)

854.7

Earth MOID

0.00257

U parameter

6.4

Next Earth close approach

Date

2026-04-22

Nominal distance (from Earth center)

0.04398

6579946

Maximum Brightness

28.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-03-28

Observatory

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

1.762621

1-sigma variation

0.000103

Unit

Eccentricity (e)

Value

0.451401

1-sigma variation

0.000050

Unit

Inclination (i)

Value

3.8390

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

12.8114

1-sigma variation

0.0082

Unit

Arg. of Perihelion (ω)

Value

203.7008

1-sigma variation

0.0184

Unit

Mean Anomaly (M)

Value

18.27798

1-sigma variation

0.30970

Unit

Perihelion distance

Value

0.966972

1-sigma variation

Unit

Aphelion distance

Value

2.558269

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.391338

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.006308

1-sigma variation

Unit

MOID

Value

0.002569

1-sigma variation

Unit

Orbit Period

Value

854.7455

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.06086E-8	5.17448E-9	6.99691E-8	-8.48163E-7	1.89268E-6	-3.18990E-5
e	5.17448E-9	2.52392E-9	3.41302E-8	-4.13704E-7	9.23181E-7	-1.55591E-5
i	6.99691E-8	3.41302E-8	4.62275E-7	-5.59504E-6	1.24855E-5	-2.10390E-4
Ω	-8.48163E-7	-4.13704E-7	-5.59504E-6	6.78121E-5	-1.51323E-4	2.55033E-3
ω	1.89268E-6	9.23181E-7	1.24855E-5	-1.51323E-4	3.37678E-4	-5.69106E-3
M	-3.18990E-5	-1.55591E-5	-2.10390E-4	2.55033E-3	-5.69106E-3	9.59167E-2

Date of computation: 2026-03-17 23:26 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

27.659

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

8 - 17*

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

2567

Unit

Source

[1]

Normalized RMS of residuals

Value

0.71468

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-03-28.42768

Unit

Source

[2]

Last Observation

Value

2019-03-31.037331

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

86 (2)

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

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 2019FB1 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	1950-03-16 02:31	531.6	0.1041483	0.0928498	0.0037679
EARTH	1969-05-02 12:17	> 1 w	0.0466001	0.0439658	0.0041373
EARTH	1988-06-17 22:13	> 1 d	0.1679052	0.0659692	0.0392723
EARTH	2019-03-31 08:34	< 1 s	0.0039516	0.0039491	0.0000008
EARTH	2026-04-22 01:15	> 1 d	0.0439842	0.0330903	0.0038763
EARTH	2033-05-26 00:45	> 1 d	0.0541946	0.0534012	0.0018211
EARTH	2040-06-15 21:11	> 1 d	0.1351198	0.0702590	0.0252795
EARTH	2101-03-23 19:16	> 1 d	0.0502018	0.0030511	0.0443510
EARTH	2108-04-12 02:09	> 1 w	0.0252762	0.0028672	0.0244143
EARTH	2115-06-05 14:39	> 1 d	0.0671740	0.0595748	0.0030661

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
343.67340158	88.04664356	0.00324515	MINIMUM
14.52536777	137.96568461	0.05381764	MINIMUM
9.14989269	129.26261371	0.05422399	SADDLE
180.80421606	296.08664194	1.56377220	SADDLE
1.88890788	297.40989381	1.95981212	SADDLE
180.64011330	115.99143093	3.56435567	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2019FB1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2117-04-02.858	94369.858	0.914	0.000	1.40 ± 0.002	4.42E5	1.20E-6	2.62E-2	-7.62	0


Based on 86 optical observations (of which 2 are rejected as outliers) from 2019/03/28.428 to 2019/03/31.037.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.72 and 1.72 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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Download Impactor Table as: