Asteroids

348400 2005JF21 help

Last update: 2025-11-30 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.035

Aphelion (Q)

3.416

Eccentricity (e)

0.535

Inclination (i)

10.8

deg

Orbit period (P)

1212.5

Earth MOID

0.04728

U parameter

0.0

Next Earth close approach

Date

2088-08-16

Nominal distance (from Earth center)

0.0564

8436742

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.2

mag

Diameter

300

Taxonomic type

Rotation period (T)

2.410

Discovery Information

Discovery Date

2005-05-04

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

2.225271

1-sigma variation

8.687E-10

Unit

Eccentricity (e)

Value

0.534902

1-sigma variation

8.577E-9

Unit

Inclination (i)

Value

10.8434

1-sigma variation

2.510E-6

Unit

Long. of Ascending Node (Ω)

Value

132.1726

1-sigma variation

7.639E-6

Unit

Arg. of Perihelion (ω)

Value

206.1489

1-sigma variation

8.531E-6

Unit

Mean Anomaly (M)

Value

28.96658

1-sigma variation

1.169E-6

Unit

Perihelion distance

Value

1.034969

1-sigma variation

Unit

Aphelion distance

Value

3.415573

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.069696

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.057648

1-sigma variation

Unit

MOID

Value

0.047284

1-sigma variation

Unit

Orbit Period

Value

1212.4753

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.54598E-19	2.28438E-21	-8.55128E-17	7.54308E-16	-1.85739E-16	-7.63530E-16
e	2.28438E-21	7.35571E-17	-2.32824E-16	1.17935E-15	9.33058E-15	-2.74095E-15
i	-8.55128E-17	-2.32824E-16	6.29958E-12	-6.98481E-12	6.65136E-12	2.51685E-13
Ω	7.54308E-16	1.17935E-15	-6.98481E-12	5.83496E-11	-5.98019E-11	1.08147E-12
ω	-1.85739E-16	9.33058E-15	6.65136E-12	-5.98019E-11	7.27718E-11	-4.08022E-12
M	-7.63530E-16	-2.74095E-15	2.51685E-13	1.08147E-12	-4.08022E-12	1.36668E-12

Date of computation: 2025-11-30 13:00 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

2.410

Unit

Source

[3]

Quality

Value

3,B,R

Unit

Source

[3]

Amplitude

Value

0.1

Unit

mag

Source

[3]

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.244

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[-]

Diameter

Value

300

Unit

Source

[5]

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

[6]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Unit

Source

[2]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Stephens, R.D. & B.D. Warner (2016) MPB 43, 22-24. (LIGHTCURVE OBSERVATIONS OF (348400) 2005 JF21: AN NEA BINARY) 2.) Naidu, S.P. et al. (2015) CBET HREF="http://www.cbat.eps.harvard.edu/iau/cbet/004100/CBET004139.txt">4139. (348400) 2005 JF_21 (radar observations and binary asteroid detection) 3.) Oey, J. & R. Groom (2016) MPB 43, 208-210. (PHOTOMETRIC OBSERVATIONS OF NEAR-EARTH ASTEROID (348400) 2005 JF21)
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Naidu, S.P. et al. (2015) CBET HREF="http://www.cbat.eps.harvard.edu/iau/cbet/004100/CBET004139.txt">4139. (348400) 2005 JF_21 (radar observations and binary asteroid detection)
[6]	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

8411

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.364252

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-11-19.42134

Unit

Source

[2]

Last Observation

Value

2025-11-29.265231

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1934 (3)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2015-07-24

Unit

Source

[3]

Last Observation

Value

2015-07-24

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

1 (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 348400 2005JF21 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	1952-08-21 10:24	< 1 min	0.0703808	0.0703802	0.0000002
EARTH	2015-08-16 14:00	< 1 s	0.0517128	0.0517128	0.0000000
EARTH	2088-08-16 19:03	< 1 min	0.0563961	0.0563959	0.0000001
EARTH	2098-07-23 20:05	< 1 min	0.1814826	0.1814814	0.0000004

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
349.40957312	218.36454612	0.04728381	MINIMUM
359.37046407	56.26754458	2.02447834	SADDLE
180.14808259	56.44641205	2.42918711	SADDLE
179.33348022	235.99958177	4.42327862	MAXIMUM

Download:

MOID Plots

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