Asteroids

7335 1989JA help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.913

Aphelion (Q)

2.631

Eccentricity (e)

0.485

Inclination (i)

15.2

deg

Orbit period (P)

861.6

Earth MOID

0.02219

U parameter

0.0

Next Earth close approach

Date

2055-06-23

Nominal distance (from Earth center)

0.18521

27707497

Maximum Brightness

17.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.7

mag

Diameter

730

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1989-05-01

Observatory

Palomar Mountain

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

1.772071

1-sigma variation

2.045E-9

Unit

Eccentricity (e)

Value

0.484560

1-sigma variation

7.683E-9

Unit

Inclination (i)

Value

15.1739

1-sigma variation

3.161E-6

Unit

Long. of Ascending Node (Ω)

Value

61.2790

1-sigma variation

1.425E-6

Unit

Arg. of Perihelion (ω)

Value

232.2791

1-sigma variation

3.083E-6

Unit

Mean Anomaly (M)

Value

72.73496

1-sigma variation

8.212E-7

Unit

Perihelion distance

Value

0.913396

1-sigma variation

Unit

Aphelion distance

Value

2.630745

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.939617

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.033798

1-sigma variation

Unit

MOID

Value

0.022192

1-sigma variation

Unit

Orbit Period

Value

861.6283

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.18186E-18	5.76868E-19	-1.42682E-15	9.14053E-16	-1.87837E-15	-1.27900E-15
e	5.76868E-19	5.90291E-17	2.47390E-16	-2.45829E-15	1.86691E-14	-3.85748E-15
i	-1.42682E-15	2.47390E-16	9.99379E-12	-2.73399E-12	2.73919E-12	5.10344E-13
Ω	9.14053E-16	-2.45829E-15	-2.73399E-12	2.02993E-12	-2.98906E-12	-8.99756E-14
ω	-1.87837E-15	1.86691E-14	2.73919E-12	-2.98906E-12	9.50755E-12	-8.41147E-13
M	-1.27900E-15	-3.85748E-15	5.10344E-13	-8.99756E-14	-8.41147E-13	6.74356E-13

Date of computation: 2025-07-29 02:36 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

[4]

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.728

17.8

Unit

mag

Source

[3]

[4]

Slope Parameter (G)

Value

0.15**

0.23

Unit

mag

Source

[3]

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.25

Unit

Source

[6]

Diameter

Value

730

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

Visual S

Radar R

Unit

Source

[7]

[8]

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Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	EARN	1.) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids)
[5]	EARN	1.) C. R. Nugent et al (2016) AJ 152 63
[6]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 2.) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs) 3.) Nugent, C.R. et al. (2016) Astron. J. 152_63 (12pp) (NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos) (207 NEOs) 4.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012. 5.) Calculated by the NEOCC based on the albedo value
[7]	EARN	1.) Lazzarin, M. et al. (1997) Astron. & Astrophys. 327, 388-391. (Compositional properties of Near-Earth Asteroids: spectroscopic comparison with Ordinary Chondrite Meteorites) 2.) Lazzarin, M. et al. (1997) B.A.A.S. 29, 966. (Spectroscopic Comparison Between Near-Earth Asteroids and Ordinary Chondrites Meteorites) 3.) Bus, S.J. & Binzel, R.P. (2002) Icarus 158,106-145. (Phase II of the Small Main-Belt Asteroid Spectrographic Survey: A Feature-Based Taxonomy.)
[8]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Ostro, S.J. et al. (1991) Astron. J. 102, 1490-1502. (Asteroid radar astrometry) 3.) Mahapatra, P.R. et al. (2002) Planet. Space Sci. 50, 257-260. (Radar observations of asteroid 7335 (1989 JA))

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

12808

Unit

Source

[1]

Unobserved

Value

470

Unit

Source

[1]

Normalized RMS of residuals

Value

0.467701

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1989-04-06.37153

Unit

Source

[2]

Last Observation

Value

2024-04-30.155355

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

2588 (20)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

1989-05-25

Unit

Source

[3]

Last Observation

Value

2022-05-23

Unit

Source

[3]

Delay (Discarded)

Value

4 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

4 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

8 (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 7335 1989JA 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	1989-06-03 18:35	< 1 min	0.0883422	0.0883413	0.0000003
EARTH	2022-05-27 14:25	< 1 s	0.0269032	0.0269032	0.0000000
EARTH	2055-06-23 01:54	< 1 min	0.1852132	0.1852124	0.0000002
EARTH	2081-05-20 00:16	< 1 min	0.0849151	0.0849137	0.0000004
EARTH	2114-05-21 20:37	< 1 min	0.0759760	0.0759752	0.0000002

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
330.10170759	141.88177037	0.02219189	MINIMUM
28.25310575	238.70307242	0.26437714	MINIMUM
23.13437585	230.42002155	0.26460501	SADDLE
181.92678997	11.40854331	1.68107094	SADDLE
1.38508792	12.93800623	1.88673329	SADDLE
178.90310924	189.62066464	3.63101491	MAXIMUM

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MOID Plots

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