Asteroids

285331 1999FN53 help

Last update: 2025-03-14 12:42 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.944

Aphelion (Q)

2.527

Eccentricity (e)

0.456

Inclination (i)

20.2

deg

Orbit period (P)

834.9

Earth MOID

0.05849

U parameter

0.0

Next Earth close approach

Date

2031-05-18

Nominal distance (from Earth center)

0.08479

12684305

Maximum Brightness

19.2

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

18.2

mag

Diameter

600

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1999-03-31

Observatory

Lowell Observatory-LONEOS

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.735179

1-sigma variation

1.810E-9

Unit

Eccentricity (e)

Value

0.456187

1-sigma variation

1.122E-8

Unit

Inclination (i)

Value

20.1701

1-sigma variation

4.837E-6

Unit

Long. of Ascending Node (Ω)

Value

50.5692

1-sigma variation

1.143E-5

Unit

Arg. of Perihelion (ω)

Value

191.7352

1-sigma variation

1.152E-5

Unit

Mean Anomaly (M)

Value

126.99529

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.943613

1-sigma variation

Unit

Aphelion distance

Value

2.526745

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.493464

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.060097

1-sigma variation

Unit

MOID

Value

0.058491

1-sigma variation

Unit

Orbit Period

Value

834.8621

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.27681E-18	8.75953E-18	2.61180E-15	-3.36740E-15	8.55637E-15	-9.42319E-15
e	8.75953E-18	1.25836E-16	7.55852E-16	-2.09307E-15	1.91262E-14	-1.85360E-14
i	2.61180E-15	7.55852E-16	2.34004E-11	-1.78120E-11	2.14650E-11	-7.38830E-12
Ω	-3.36740E-15	-2.09307E-15	-1.78120E-11	1.30644E-10	-1.17266E-10	-6.49193E-12
ω	8.55637E-15	1.91262E-14	2.14650E-11	-1.17266E-10	1.32790E-10	-1.71618E-11
M	-9.42319E-15	-1.85360E-14	-7.38830E-12	-6.49193E-12	-1.71618E-11	3.26506E-11

Date of computation: 2025-03-07 13:03 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

18.195

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.17

Unit

Source

[2]

Diameter

Value

600

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	EARN	1.) Nugent, C.R. et al. (2016) Astron. J. 152_63 (12pp) (NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos) (207 NEOs)
[3]	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

9131

Unit

Source

[1]

Unobserved

Value

349

Unit

Source

[1]

Normalized RMS of residuals

Value

0.489367

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1999-03-31.33517

Unit

Source

[2]

Last Observation

Value

2024-03-30.128997

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

536 (8)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

1999-05-10

Unit

Source

[3]

Last Observation

Value

1999-05-12

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

3 (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

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 285331 1999FN53 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1951-05-29 01:51	< 1 min	0.1440480	0.1440450	0.0000010
EARTH	1967-05-18 05:15	< 1 min	0.0841824	0.0841809	0.0000005
EARTH	1983-05-12 13:39	< 1 min	0.0616555	0.0616553	0.0000001
EARTH	1999-05-12 00:37	< 1 min	0.0593162	0.0593162	0.0000000
EARTH	2015-05-14 11:24	< 1 min	0.0677615	0.0677614	0.0000000
EARTH	2031-05-18 03:44	< 1 min	0.0847893	0.0847889	0.0000001
EARTH	2047-05-27 12:48	< 1 min	0.1355963	0.1355954	0.0000003
EARTH	2118-04-26 02:40	< 1 min	0.1293001	0.1292992	0.0000003

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
351.29425010	125.21369635	0.05849108	MINIMUM
182.31486726	320.93811378	1.54383082	SADDLE
2.95054562	323.34803952	1.92909656	SADDLE
179.69935960	139.44269651	3.53730983	MAXIMUM

Download:

MOID Plots

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