Asteroids

2026DD1 help

Last update: 2026-02-23 13:15 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.831

Aphelion (Q)

1.371

Eccentricity (e)

0.245

Inclination (i)

2.7

deg

Orbit period (P)

421.8

Earth MOID

0.00214

U parameter

6.8

Next Earth close approach

Date

2026-02-25

Nominal distance (from Earth center)

0.01009

1510124

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.8

mag

Diameter

7 - 16*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-02-19

Observatory

Pan-STARRS 2, Haleakala

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.100723

1-sigma variation

0.000113

Unit

Eccentricity (e)

Value

0.245326

1-sigma variation

0.000156

Unit

Inclination (i)

Value

2.7160

1-sigma variation

0.0017

Unit

Long. of Ascending Node (Ω)

Value

144.1156

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

92.1006

1-sigma variation

0.0013

Unit

Mean Anomaly (M)

Value

224.46814

1-sigma variation

0.02750

Unit

Perihelion distance

Value

0.830687

1-sigma variation

Unit

Aphelion distance

Value

1.370759

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.055991

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.011703

1-sigma variation

Unit

MOID

Value

0.002140

1-sigma variation

Unit

Orbit Period

Value

421.8085

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.28172E-8	1.76922E-8	1.86490E-7	2.34547E-8	1.43499E-7	3.11344E-6
e	1.76922E-8	2.44234E-8	2.57332E-7	3.21649E-8	1.98578E-7	4.29759E-6
i	1.86490E-7	2.57332E-7	2.72544E-6	3.66484E-7	2.05421E-6	4.52983E-5
Ω	2.34547E-8	3.21649E-8	3.66484E-7	9.67511E-8	1.86401E-7	5.69445E-6
ω	1.43499E-7	1.98578E-7	2.05421E-6	1.86401E-7	1.74816E-6	3.48537E-5
M	3.11344E-6	4.29759E-6	4.52983E-5	5.69445E-6	3.48537E-5	7.56289E-4

Date of computation: 2026-02-23 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

27.841

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

7 - 16*

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

0.5

Unit

Source

[1]

Normalized RMS of residuals

Value

0.768556

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-02-19.38781

Unit

Source

[2]

Last Observation

Value

2026-02-23.24088

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

16 (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

Close Approaches for 2026DD1 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	1950-02-26 16:11	> 1 mo	0.0496338	0.0073764	1.9445509
EARTH	1958-04-15 14:24	> 1 mo	0.1653404	0.0162881	0.6231991
EARTH	1966-05-28 11:47	> 1 mo	0.1873105	0.0669196	0.1062284
EARTH	1974-07-18 05:52	> 1 mo	0.1257907	0.0119402	0.5200325
EARTH	1982-08-14 18:50	> 1 d	0.0109457	0.0027581	0.0248828
EARTH	1989-04-24 02:23	> 1 d	0.1719444	0.1613785	0.0035223
EARTH	1997-08-17 01:16	564.2	0.0516777	0.0271841	0.0081712
EARTH	2004-05-19 02:55	> 1 w	0.1857393	0.1856165	0.0000412
EARTH	2011-02-21 02:52	1080.0	0.0753894	0.0303616	0.0151965
EARTH	2019-06-16 15:31	> 1 d	0.1719154	0.1658325	0.0020295
EARTH	2026-02-25 07:14	< 1 min	0.0100946	0.0100766	0.0000060
EARTH	2034-06-28 20:55	> 1 d	0.1567332	0.1472529	0.0031637
EARTH	2041-02-26 20:40	> 1 d	0.0273436	0.0100526	0.0131531
EARTH	2049-08-10 12:36	> 1 d	0.0409751	0.0015681	0.0294603
EARTH	2056-04-18 12:48	> 1 d	0.1653276	0.1540900	0.0037460
EARTH	2064-08-17 10:11	1343.8	0.0598534	0.0213068	0.0128574
EARTH	2071-05-24 15:28	> 1 w	0.1855138	0.1840326	0.0004952
EARTH	2078-02-23 00:13	> 1 d	0.0396189	0.0103792	0.0285223
EARTH	2086-06-19 09:18	> 1 w	0.1692286	0.1318010	0.0125357
EARTH	2093-02-24 19:31	> 1 d	0.0114362	0.0103170	0.0389874
EARTH	2101-05-17 20:42	> 1 mo	0.1873136	0.1018696	0.0687591
EARTH	2109-08-13 19:46	> 1 mo	0.0356080	0.0004145	3.1744551
EARTH	2116-02-24 14:20	> 1 mo	0.0340672	0.0104559	2.7123439
EARTH	2117-08-26 15:18	> 1 mo	0.1742879	0.0000048	2.4313659
EARTH	2124-03-11 04:52	> 1 mo	0.1001601	0.0031352	0.5166470

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
71.34181448	220.91523180	0.00214028	MINIMUM
293.62899792	54.02292700	0.00997281	MINIMUM
2.95280467	137.90292489	0.18771650	SADDLE
181.83965759	316.84066615	0.38634559	SADDLE
3.08587902	318.09758373	1.81840498	SADDLE
181.99243099	136.97104868	2.38333309	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026DD1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2072-08-15.133	78069.133	-1.946	0.000	1.64 ± 0.011	1.04E5	7.82E-7	2.61E-2	-7.52	0
2072-08-15.219	78069.219	-1.764	0.000	1.63 ± 0.011	1.07E5	1.09E-6	2.62E-2	-7.38	0
2080-08-15.051	80991.051	-1.857	0.000	1.61 ± 0.011	1.29E6	8.28E-8	2.61E-2	-8.57	0
2080-08-15.142	80991.142	-1.945	0.000	0.66 ± 0.011	3.78E6	5.44E-8	2.61E-2	-8.75	0
2085-08-15.189	82817.189	-1.764	0.000	0.58 ± 0.016	4.88E7	5.80E-9	2.61E-2	-9.76	0
2088-08-15.589	83913.589	-2.671	0.000	0.87 ± 0.011	1.68E3	2.09E-5	2.61E-2	-6.22	0
2093-08-14.695	85738.695	-1.556	0.000	0.86 ± 0.011	1.54E7	2.40E-8	2.62E-2	-9.20	0
2093-08-15.901	85739.901	-4.188	0.000	0.60 ± 0.023	5.83E5	3.72E-10	2.60E-2	-11.01	0
2094-08-15.615	86104.615	-1.792	0.000	0.76 ± 0.012	1.01E6	2.55E-7	2.62E-2	-8.18	0
2094-08-15.646	86104.646	-1.782	0.000	1.38 ± 0.011	1.87E6	9.83E-8	2.62E-2	-8.59	0
2094-08-16.022	86105.022	-2.646	0.000	0.63 ± 0.022	1.03E6	4.14E-8	2.61E-2	-8.96	0
2095-08-16.369	86470.369	-2.592	0.000	1.64 ± 0.010	1.61E5	1.51E-7	2.61E-2	-8.41	0
2096-08-15.102	86835.102	-2.009	0.000	0.02 ± 0.000	5.41E7	3.48E-9	2.61E-2	-10.05	0
2096-08-15.666	86835.666	-2.835	0.000	1.75 ± 0.006	4.00E4	5.29E-7	2.61E-2	-7.87	0
2107-08-16.637	90852.637	-1.565	2.630	1.79 ± 0.006	1.40E6	5.27E-11	2.61E-2	-11.94	0
2109-08-16.225	91583.225	-1.351	0.000	1.09 ± 0.008	1.18E5	3.92E-6	2.61E-2	-7.07	0
2109-08-16.322	91583.322	-1.306	0.000	1.07 ± 0.009	3.03E5	1.61E-6	2.61E-2	-7.46	0
2109-08-16.363	91583.363	-1.247	0.000	0.25 ± 0.076	2.27E6	2.84E-7	2.62E-2	-8.21	0
2110-08-16.606	91948.606	-1.932	0.000	0.89 ± 0.012	4.56E4	4.16E-6	2.61E-2	-7.05	0
2111-08-16.697	92313.697	-1.944	0.000	0.95 ± 0.000	1.36E7	1.45E-8	2.61E-2	-9.52	0
2115-08-16.602	93774.602	-1.562	0.000	1.27 ± 0.045	4.46E7	9.18E-9	2.61E-2	-9.73	0
2115-08-17.312	93775.312	-2.617	0.000	1.33 ± 0.011	6.77E5	4.52E-8	2.61E-2	-9.04	0
2116-08-14.535	94138.535	-1.724	0.000	1.22 ± 0.000	9.61E7	2.43E-9	2.62E-2	-10.32	0
2116-08-15.290	94139.290	0.835	0.000	0.47 ± 0.008	2.73E6	3.58E-7	2.63E-2	-8.15	0
2116-08-15.933	94139.933	-1.350	0.000	1.04 ± 0.009	9.52E6	4.85E-8	2.62E-2	-9.02	0
2117-08-16.274	94505.274	-1.353	0.000	1.32 ± 0.009	4.52E6	8.41E-8	2.62E-2	-8.78	0
2117-08-16.349	94505.349	-1.928	0.000	1.54 ± 0.012	2.10E6	5.24E-8	2.61E-2	-8.99	0
2117-08-16.792	94505.792	-3.538	0.000	1.42 ± 0.019	9.05E5	1.82E-9	2.60E-2	-10.45	0
2118-08-16.600	94870.600	-1.936	0.000	1.70 ± 0.012	3.15E6	2.82E-8	2.61E-2	-9.26	0
2118-08-16.650	94870.650	4.493	0.000	0.48 ± 0.012	1.22E6	4.60E-11	2.65E-2	-12.04	0
2120-08-16.480	95601.480	-2.697	0.000	1.56 ± 0.012	8.19E7	2.24E-10	2.60E-2	-11.37	0
2122-08-15.965	96330.965	0.928	0.000	1.18 ± 0.010	6.87E6	1.01E-7	2.63E-2	-8.72	0
2124-08-15.816	97061.816	-1.815	0.000	1.06 ± 0.009	3.87E5	6.05E-7	2.62E-2	-7.96	0
2125-08-16.176	97427.176	-1.632	0.000	1.53 ± 0.011	2.37E6	8.10E-8	2.62E-2	-8.83	0
2126-08-15.676	97791.676	-1.572	0.292	1.78 ± 0.016	5.70E7	2.84E-10	2.62E-2	-11.29	n/a


Based on 16 optical observations (of which 0 are rejected as outliers) from 2026/02/19.388 to 2026/02/23.241.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.77 and 1.77 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260223 143025.626 UTC.

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