Asteroids

2135 Aristaeus help

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

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.795

Aphelion (Q)

2.404

Eccentricity (e)

0.503

Inclination (i)

23.1

deg

Orbit period (P)

738.9

Earth MOID

0.00928

U parameter

2.2

Next Earth close approach

Date

2062-03-26

Nominal distance (from Earth center)

0.08488

12697140

Maximum Brightness

15.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

700 - 1500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1977-04-17

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

1.599598

1-sigma variation

8.143E-8

Unit

Eccentricity (e)

Value

0.503093

1-sigma variation

0.000001

Unit

Inclination (i)

Value

23.0727

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

191.1104

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

290.9822

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

299.74356

1-sigma variation

0.00077

Unit

Perihelion distance

Value

0.794851

1-sigma variation

Unit

Aphelion distance

Value

2.404344

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.012973

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.457231

1-sigma variation

Unit

MOID

Value

0.009275

1-sigma variation

Unit

Orbit Period

Value

738.9492

1-sigma variation

Unit

U parameter

Value

2.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.63078E-15	5.62921E-14	-2.99916E-12	2.15245E-11	-2.26091E-12	-6.22773E-11
e	5.62921E-14	1.63345E-12	-4.64257E-11	3.79953E-10	-1.43720E-10	-6.41905E-10
i	-2.99916E-12	-4.64257E-11	2.64865E-9	-1.49196E-8	4.63492E-9	3.03640E-8
Ω	2.15245E-11	3.79953E-10	-1.49196E-8	1.16468E-7	-3.94971E-8	-2.22545E-7
ω	-2.26091E-12	-1.43720E-10	4.63492E-9	-3.94971E-8	2.43409E-8	3.36999E-8
M	-6.22773E-11	-6.41905E-10	3.03640E-8	-2.22545E-7	3.36999E-8	5.96851E-7

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

[-]

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

17.992

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

700 - 1500*

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

[-]

Download this part as:

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

15749

Unit

Source

[1]

Unobserved

Value

1904

Unit

Source

[1]

Normalized RMS of residuals

Value

0.544063

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1977-04-17.34306

Unit

Source

[2]

Last Observation

Value

2020-05-30.358475

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

62 (1)

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

Close Approaches for 2135 Aristaeus 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	1975-03-25 23:20	< 1 min	0.0921641	0.0921618	0.0000008
EARTH	1977-04-01 17:42	< 1 min	0.0321587	0.0321565	0.0000007
EARTH	1979-04-09 20:22	< 1 min	0.1727184	0.1727141	0.0000014
MARS	2039-07-27 13:44	1.7	0.0489699	0.0488982	0.0000239
EARTH	2062-03-26 02:02	2.9	0.0848751	0.0847962	0.0000263
EARTH	2064-04-02 19:50	2.4	0.0546315	0.0545618	0.0000232

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
42.44939921	87.07938200	0.00927515	MINIMUM
306.74754363	296.47525823	0.23594074	MINIMUM
349.94137500	2.70476174	0.39698509	SADDLE
176.70457756	199.62751017	1.50747132	SADDLE
357.94068035	197.30134136	1.77826736	SADDLE
181.93953288	22.84406286	3.34077094	MAXIMUM

Download:

MOID Plots

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