Asteroids

2026JH1 help

Last update: 2026-05-19 13:16 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.335

Aphelion (Q)

1.165

Eccentricity (e)

0.554

Inclination (i)

8.3

deg

Orbit period (P)

237.3

Earth MOID

0.00122

U parameter

6.2

Next Earth close approach

Date

2035-03-21

Nominal distance (from Earth center)

0.13155

19679408

Maximum Brightness

23.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

25.4

mag

Diameter

22 - 50*

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

0.750120

1-sigma variation

0.000020

Unit

Eccentricity (e)

Value

0.553701

1-sigma variation

0.000119

Unit

Inclination (i)

Value

8.2797

1-sigma variation

0.0032

Unit

Long. of Ascending Node (Ω)

Value

55.7630

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

330.7315

1-sigma variation

0.0017

Unit

Mean Anomaly (M)

Value

286.99515

1-sigma variation

0.01332

Unit

Perihelion distance

Value

0.334778

1-sigma variation

Unit

Aphelion distance

Value

1.165461

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.638301

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.004682

1-sigma variation

Unit

MOID

Value

0.001223

1-sigma variation

Unit

Orbit Period

Value

237.2981

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.14564E-10	-2.41512E-9	-6.43687E-8	1.71327E-8	-3.40487E-8	-2.71177E-7
e	-2.41512E-9	1.40726E-8	3.75087E-7	-9.98363E-8	1.98327E-7	1.58025E-6
i	-6.43687E-8	3.75087E-7	9.99795E-6	-2.66128E-6	5.28593E-6	4.21204E-5
Ω	1.71327E-8	-9.98363E-8	-2.66128E-6	7.08443E-7	-1.40701E-6	-1.12112E-5
ω	-3.40487E-8	1.98327E-7	5.28593E-6	-1.40701E-6	2.79696E-6	2.22672E-5
M	-2.71177E-7	1.58025E-6	4.21204E-5	-1.12112E-5	2.22672E-5	1.77458E-4

Date of computation: 2026-05-19 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

25.407

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

22 - 50*

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

0.7

Unit

Source

[1]

Normalized RMS of residuals

Value

0.712696

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-05-08.361711

Unit

Source

[2]

Last Observation

Value

2026-05-18.918996

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

78 (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

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 2026JH1 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
MERCURY	1953-05-02 18:49	> 1 d	0.0246716	0.0089283	0.0119234
EARTH	1954-03-21 18:40	767.8	0.1315792	0.1268688	0.0020169
MERCURY	1955-04-23 15:53	> 1 d	0.0203868	0.0085477	0.0127908
EARTH	1956-04-29 20:39	1173.1	0.1515704	0.1445844	0.0023373
EARTH	1958-05-15 08:25	85.1	0.1152499	0.1046336	0.0035389
EARTH	1965-03-31 08:30	878.2	0.1624060	0.1584644	0.0013380
EARTH	1967-05-10 15:41	882.9	0.0986187	0.0836450	0.0049913
MERCURY	1967-07-21 05:11	> 1 d	0.0107363	0.0087347	0.0054042
EARTH	1974-03-18 05:37	209.7	0.1479459	0.1290936	0.0081444
EARTH	1976-04-10 19:16	> 1 d	0.1775205	0.1748377	0.0010545
EARTH	1978-05-15 09:35	915.7	0.0327960	0.0024299	0.0170527
MERCURY	1979-10-28 08:29	> 1 d	0.0475516	0.0082119	0.0291050
MERCURY	1981-10-19 14:24	> 1 d	0.0143971	0.0085923	0.0249117
EARTH	1985-03-17 19:48	21.2	0.1266295	0.1236165	0.0018394
EARTH	1987-04-16 18:48	864.7	0.1781031	0.1776711	0.0001477
EARTH	1989-05-15 23:40	18.9	0.0051675	0.0032034	0.0007175
MERCURY	1992-02-28 12:11	215.7	0.0346656	0.0267183	0.0026763
EARTH	1996-03-18 11:10	61.3	0.1928991	0.1882253	0.0015709
EARTH	1998-03-27 23:01	413.8	0.1565295	0.1545597	0.0006705
MERCURY	1998-08-14 17:38	734.5	0.0151883	0.0097897	0.0027203
EARTH	2000-05-01 06:08	554.4	0.1488363	0.1447120	0.0013757
EARTH	2002-05-16 06:50	58.8	0.0743889	0.0648201	0.0031896
MERCURY	2007-02-03 07:48	569.4	0.0297262	0.0122560	0.0063108
EARTH	2009-03-17 09:55	15.9	0.1382681	0.1347063	0.0012537
EARTH	2011-04-07 19:01	574.3	0.1771930	0.1763415	0.0002898
EARTH	2013-05-10 12:51	333.9	0.0986154	0.0928417	0.0019248
MERCURY	2013-07-20 08:43	682.0	0.0178927	0.0105574	0.0030742
EARTH	2015-05-14 17:46	89.5	0.1602182	0.1530705	0.0023826
MERCURY	2022-01-10 01:21	122.2	0.0421271	0.0370429	0.0016997
EARTH	2022-03-18 19:28	27.4	0.1239006	0.1238931	0.0000051
EARTH	2024-04-16 14:57	68.9	0.1796606	0.1794002	0.0000868
EARTH	2026-05-15 09:14	< 1 s	0.0396267	0.0395943	0.0000108
MERCURY	2028-06-29 15:16	267.9	0.0106384	0.0103318	0.0001172
MERCURY	2034-12-24 15:29	409.2	0.0346494	0.0260227	0.0029150
EARTH	2035-03-21 05:24	210.7	0.1315487	0.1296875	0.0006564
EARTH	2037-04-21 08:33	576.2	0.1752275	0.1740129	0.0004068
EARTH	2039-05-16 12:35	87.7	0.0142114	0.0062511	0.0026591
MERCURY	2047-12-28 04:07	> 1 d	0.0244099	0.0099347	0.0108468
EARTH	2048-03-18 05:50	475.8	0.1243371	0.1239941	0.0005717
EARTH	2050-04-14 14:58	> 1 d	0.1813314	0.1803983	0.0003702
EARTH	2052-05-12 19:19	1273.9	0.0755679	0.0437699	0.0106050
EARTH	2054-05-14 12:43	595.2	0.1645250	0.1188136	0.0152375
MERCURY	2054-07-05 15:32	> 1 d	0.0114563	0.0100326	0.0038215
MERCURY	2061-01-14 18:20	> 1 d	0.0232389	0.0086487	0.0359121
EARTH	2061-03-17 10:01	157.6	0.1418109	0.1242505	0.0095680
VENUS	2062-11-22 05:45	972.2	0.0478473	0.0460804	0.0065646
EARTH	2063-04-03 06:58	> 1 d	0.1710958	0.1597121	0.0043113
EARTH	2065-05-04 02:06	> 1 d	0.1398122	0.1103478	0.0098822
EARTH	2067-05-16 22:14	288.8	0.0658568	0.0084174	0.0191505
EARTH	2076-03-23 20:23	> 1 d	0.1444019	0.1313918	0.0056001
EARTH	2078-04-24 14:27	> 1 d	0.1706348	0.1599116	0.0036369
MERCURY	2078-07-30 23:04	> 1 d	0.0193141	0.0099714	0.0174248
EARTH	2080-05-16 02:37	324.4	0.0057557	0.0002384	0.0112551
EARTH	2089-03-18 08:43	> 1 w	0.1887117	0.1250734	0.2644450
EARTH	2091-03-22 11:27	> 1 mo	0.1388872	0.1262006	0.1335177
EARTH	2093-04-17 02:23	> 1 mo	0.1817853	0.1690298	0.0422967
MERCURY	2094-04-11 06:58	> 1 mo	0.0240103	0.0086343	0.9581052
EARTH	2095-05-12 10:08	> 1 mo	0.0904994	0.0067673	0.3918595
EARTH	2097-05-15 20:58	> 1 w	0.1083470	0.0018732	0.5158717
MERCURY	2098-11-01 15:39	> 1 mo	0.0109252	0.0084664	0.1174244
MERCURY	2103-05-23 08:33	> 1 mo	0.0174843	0.0100968	0.4812356
EARTH	2106-03-18 12:23	> 1 d	0.1275783	0.1241894	0.0846409
EARTH	2108-04-04 03:05	> 1 mo	0.1734244	0.1473250	0.0771693
EARTH	2110-05-01 21:29	> 1 mo	0.1547560	0.0508183	0.1014685
EARTH	2112-05-17 09:36	> 1 d	0.0041791	0.0010550	0.1730975
MERCURY	2120-12-30 06:50	> 1 mo	0.0115758	0.0078692	3.0295987
EARTH	2121-03-27 12:14	> 1 mo	0.1495195	0.1294021	3.0673910
EARTH	2123-04-30 17:50	> 1 mo	0.1575267	0.0567361	4.1021827
EARTH	2125-05-17 20:36	> 1 mo	0.0455338	0.0018170	12.1803686

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
231.15935898	130.14665262	0.00122326	MINIMUM
127.88871462	72.08064109	0.12359231	MINIMUM
173.83291013	98.23799262	0.18103559	SADDLE
354.37321970	274.74326221	0.66444468	SADDLE
355.08039963	96.05917375	1.33668538	SADDLE
179.15667779	281.09335884	2.16076940	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026JH1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2070-05-16.638	77247.638	-4.216	0.79 ± 0.001	3.54E5	3.05E-10	1.35E0	-9.54
2070-05-16.671	77247.671	-4.789	0.93 ± 0.002	3.25E5	2.38E-11	1.35E0	-10.65
2071-05-16.918	77612.918	-3.418	0.32 ± 0.000	2.40E5	1.18E-8	1.35E0	-7.96
2071-05-16.925	77612.925	-2.505	0.65 ± 0.001	1.86E4	2.24E-6	1.35E0	-5.69
2072-05-16.184	77978.184	-0.907	0.63 ± 0.000	3.02E6	1.92E-7	1.35E0	-6.76
2073-05-16.415	78343.415	-2.164	0.61 ± 0.002	5.57E5	1.54E-7	1.34E0	-6.87
2074-05-16.662	78708.662	-4.945	0.67 ± 0.001	5.53E4	7.75E-11	1.35E0	-10.17
2074-05-16.668	78708.668	-0.914	1.03 ± 0.000	2.10E7	1.85E-8	1.34E0	-7.80
2074-05-16.676	78708.676	-3.488	0.64 ± 0.000	2.41E5	8.38E-9	1.35E0	-8.14
2074-05-16.684	78708.684	-0.901	0.50 ± 0.000	1.37E6	4.50E-7	1.35E0	-6.41
2076-05-16.175	79439.175	-0.917	0.87 ± 0.000	1.14E7	4.23E-8	1.34E0	-7.46
2076-05-16.203	79439.203	-0.891	1.15 ± 0.001	5.92E5	4.83E-7	1.34E0	-6.40


Based on 72 optical observations (of which 1 are rejected as outliers) from 2026/05/08.362 to 2026/05/16.152.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.26 and 1.26 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260516 141900.118 UTC.

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