Asteroids

4401 Aditi help

Last update: 2026-10-05 15:20 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Amor

Perihelion (q)

1.128

Aphelion (Q)

4.039

Eccentricity (e)

0.563

Inclination (i)

26.6

deg

Orbit period (P)

1516.7

Earth MOID

0.33521

U parameter

0.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

16.1

mag

Diameter

1880

Taxonomic type

Rotation period (T)

6.670

Discovery Information

Discovery Date

1985-10-14

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.583489

1-sigma variation

7.752E-9

Unit

Eccentricity (e)

Value

0.563311

1-sigma variation

2.506E-8

Unit

Inclination (i)

Value

26.6224

1-sigma variation

7.709E-6

Unit

Long. of Ascending Node (Ω)

Value

22.7316

1-sigma variation

9.043E-6

Unit

Arg. of Perihelion (ω)

Value

68.2254

1-sigma variation

1.120E-5

Unit

Mean Anomaly (M)

Value

323.24347

1-sigma variation

0.00001

Unit

Perihelion distance

Value

1.128181

1-sigma variation

Unit

Aphelion distance

Value

4.038798

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.462732

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.227812

1-sigma variation

Unit

MOID

Value

0.335214

1-sigma variation

Unit

Orbit Period

Value

1516.7304

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.00946E-17	-1.91894E-17	-1.00027E-14	7.54278E-15	4.28539E-15	-3.90499E-14
e	-1.91894E-17	6.28031E-16	-7.95358E-15	3.39785E-15	3.02971E-14	1.45460E-14
i	-1.00027E-14	-7.95358E-15	5.94289E-11	-2.95763E-11	2.70594E-11	3.30577E-12
Ω	7.54278E-15	3.39785E-15	-2.95763E-11	8.17757E-11	-7.08343E-11	-3.85957E-12
ω	4.28539E-15	3.02971E-14	2.70594E-11	-7.08343E-11	1.25359E-10	-2.41388E-11
M	-3.90499E-14	1.45460E-14	3.30577E-12	-3.85957E-12	-2.41388E-11	3.43674E-11

Date of computation: 2026-10-05 15:20 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

6.670

Unit

Source

[3]

Quality

Value

Unit

Source

[3]

Amplitude

Value

0.64

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

16.109

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.227

0.343

Unit

Source

[1]

[5]

Diameter

Value

1880

Unit

Source

[1]

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]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Warner, B.D. (2015) MPB 42, 172-183. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2015 JANUARY - MARCH)(35NEAs) 2.) Warner, B.D. (2015) MPB 42, 41-53. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 JUNE-OCTOBER) (45 NEAs)
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; et al. (2012) Astrophys. J. Let. 760, L12.

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

14964

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.495699

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1985-10-14.38297

Unit

Source

[2]

Last Observation

Value

2026-10-03.283594

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1272 (19)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
335.91472041	302.34087215	0.33521415	MINIMUM
2.40952643	170.80287390	2.09215140	SADDLE
181.93390742	166.74954907	3.14568079	SADDLE
178.60600626	344.84114388	4.95071022	MAXIMUM

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MOID Plots

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