Asteroids

2026JA1 help

Last update: 2026-05-12 13:15 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.801

Aphelion (Q)

2.102

Eccentricity (e)

0.448

Inclination (i)

2.5

deg

Orbit period (P)

638.8

Earth MOID

0.00131

U parameter

7.4

Next Earth close approach

Date

2033-05-10

Nominal distance (from Earth center)

0.03236

4840487

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

10 - 22*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-05-08

Observatory

Mt. Lemmon Survey

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.451634

1-sigma variation

0.000567

Unit

Eccentricity (e)

Value

0.447972

1-sigma variation

0.000270

Unit

Inclination (i)

Value

2.4859

1-sigma variation

0.0013

Unit

Long. of Ascending Node (Ω)

Value

50.8308

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

252.2779

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

346.69001

1-sigma variation

0.01323

Unit

Perihelion distance

Value

0.801343

1-sigma variation

Unit

Aphelion distance

Value

2.101926

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.352430

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.011781

1-sigma variation

Unit

MOID

Value

0.001310

1-sigma variation

Unit

Orbit Period

Value

638.8286

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.21534E-7	1.53364E-7	7.23001E-7	6.83817E-8	-7.78859E-7	7.50250E-6
e	1.53364E-7	7.31608E-8	3.44880E-7	3.25806E-8	-3.69586E-7	3.57824E-6
i	7.23001E-7	3.44880E-7	1.62686E-6	1.53111E-7	-1.74569E-6	1.68693E-5
Ω	6.83817E-8	3.25806E-8	1.53111E-7	1.51696E-8	-1.73379E-7	1.59664E-6
ω	-7.78859E-7	-3.69586E-7	-1.74569E-6	-1.73379E-7	2.27442E-6	-1.82308E-5
M	7.50250E-6	3.57824E-6	1.68693E-5	1.59664E-6	-1.82308E-5	1.75068E-4

Date of computation: 2026-05-12 13:15 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

27.163

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

10 - 22*

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.606008

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-08.342212

Unit

Source

[2]

Last Observation

Value

2026-05-11.257429

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (0)

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

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

Close Approaches for 2026JA1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1950-09-29 20:20	> 1 w	0.0553194	0.0306415	0.0736794
MARS	1972-01-31 01:29	602.6	0.0029322	0.0018964	0.0099840
EARTH	1973-05-23 01:14	1368.4	0.0879182	0.0682083	0.0065700
EARTH	1987-10-11 16:43	> 1 d	0.1046563	0.0279045	0.0735728
EARTH	1996-05-01 10:19	> 1 d	0.1743997	0.0004558	0.0918997
EARTH	2003-06-21 06:19	> 1 w	0.1796594	0.0624124	0.0396708
EARTH	2010-09-14 07:14	> 1 w	0.1358060	0.0258153	0.0550264
EARTH	2026-05-13 00:35	< 1 min	0.0065054	0.0064949	0.0000035
EARTH	2033-05-10 20:49	> 1 d	0.0323567	0.0012811	0.0252866
EARTH	2040-05-03 05:23	> 1 d	0.1517958	0.0900521	0.0205813
EARTH	2066-10-09 14:45	> 1 w	0.0472423	0.0264673	0.0882481
EARTH	2073-09-26 19:57	> 1 d	0.0909308	0.0478400	0.0149827
EARTH	2080-08-22 17:23	> 1 w	0.1934899	0.1050888	0.0297956
EARTH	2094-06-09 06:32	> 1 mo	0.1506316	0.0088356	0.2490253
EARTH	2101-05-12 23:51	> 1 mo	0.0271348	0.0022114	0.5234115
EARTH	2113-10-19 20:45	> 1 mo	0.1893961	0.0248101	2.6565455
EARTH	2120-09-21 14:19	> 1 mo	0.1229283	0.0240420	3.3113771

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
312.72520003	127.28597528	0.00131038	MINIMUM
46.31975694	269.11213538	0.02695252	MINIMUM
359.54049921	198.32216470	0.21783310	SADDLE
179.77371472	18.40477083	1.11914695	SADDLE
359.31451089	17.93654067	1.78530543	SADDLE
179.68936835	198.34854465	3.11731083	MAXIMUM

Download:

MOID Plots

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