Asteroids

2026JD1 help

Last update: 2026-05-16 13:16 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.858

Aphelion (Q)

3.920

Eccentricity (e)

0.641

Inclination (i)

0.5

deg

Orbit period (P)

1348.9

Earth MOID

0.00155

U parameter

7.4

Next Earth close approach

Date

2037-08-04

Nominal distance (from Earth center)

0.11788

17634711

Maximum Brightness

29.6

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 20*

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

2.389169

1-sigma variation

0.001785

Unit

Eccentricity (e)

Value

0.640691

1-sigma variation

0.000289

Unit

Inclination (i)

Value

0.4690

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

240.6488

1-sigma variation

0.0056

Unit

Arg. of Perihelion (ω)

Value

41.6131

1-sigma variation

0.0041

Unit

Mean Anomaly (M)

Value

357.84482

1-sigma variation

0.00344

Unit

Perihelion distance

Value

0.858451

1-sigma variation

Unit

Aphelion distance

Value

3.919888

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.062007

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.732785

1-sigma variation

Unit

MOID

Value

0.001549

1-sigma variation

Unit

Orbit Period

Value

1348.8659

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.18745E-6	5.16754E-7	-1.14634E-7	9.71429E-6	-7.03268E-6	6.14827E-6
e	5.16754E-7	8.37771E-8	-1.85977E-8	1.57529E-6	-1.14049E-6	9.96760E-7
i	-1.14634E-7	-1.85977E-8	6.14675E-9	-4.09220E-7	3.06950E-7	-2.20270E-7
Ω	9.71429E-6	1.57529E-6	-4.09220E-7	3.13818E-5	-2.30338E-5	1.87124E-5
ω	-7.03268E-6	-1.14049E-6	3.06950E-7	-2.30338E-5	1.69633E-5	-1.35429E-5
M	6.14827E-6	9.96760E-7	-2.20270E-7	1.87124E-5	-1.35429E-5	1.18598E-5

Date of computation: 2026-05-16 13:16 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

27.327

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

9 - 20*

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

[-]

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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

0.590324

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-08.185774

Unit

Source

[2]

Last Observation

Value

2026-05-10.927641

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

40 (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 2026JD1 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	1961-07-18 08:34	> 1 mo	0.1469268	0.0099056	0.0522517
EARTH	2026-05-11 12:04	< 1 min	0.0021047	0.0021023	0.0000008
EARTH	2037-08-04 21:29	> 1 w	0.1178808	0.0094948	0.0430938
EARTH	2063-05-12 20:04	> 1 w	0.0338929	0.0003494	0.1520280
EARTH	2111-05-01 22:23	> 1 mo	0.1779331	0.0006017	2.9795916
EARTH	2122-08-20 14:48	> 1 mo	0.0527286	0.0076421	1.8883995

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
334.31199155	125.12824564	0.00154872	MINIMUM
25.77250552	230.69760296	0.00826797	MINIMUM
0.06315822	177.95092225	0.15846556	SADDLE
0.04879146	357.92098053	1.84196232	SADDLE
180.01143482	357.87067819	2.93638817	SADDLE
180.01056139	177.87057154	4.93671136	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026JD1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2110-05-16.145	91856.145	0.210	1.225	1.30 ± 0.010	2.89E7	2.95E-10	9.19E-2	-10.76
2118-05-17.595	94779.595	-4.622	0.000	1.11 ± 0.004	2.08E5	8.20E-11	8.88E-2	-11.37
2119-05-14.549	95141.549	2.159	0.000	0.69 ± 0.006	9.18E5	9.14E-8	9.44E-2	-8.30
2122-05-15.747	96238.747	-0.549	0.000	1.18 ± 0.004	3.08E6	1.32E-7	9.28E-2	-8.17
2122-05-15.754	96238.754	-0.551	0.000	1.02 ± 0.004	1.34E7	4.00E-8	9.28E-2	-8.68
2122-05-15.793	96238.793	-0.160	0.000	0.71 ± 0.004	3.97E6	2.17E-7	9.28E-2	-7.95
2122-05-15.802	96238.802	-0.159	0.000	0.55 ± 0.004	1.73E7	5.26E-8	9.27E-2	-8.56
2122-05-15.997	96238.997	-0.049	0.000	0.62 ± 0.004	6.03E6	1.49E-7	9.23E-2	-8.12


Based on 40 optical observations (of which 0 are rejected as outliers) from 2026/05/08.186 to 2026/05/10.928.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.28 and 1.28 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260516 140105.696 UTC.

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