Close-approach summary for September 2026 · JPL SBDB CAD

Astrophyzix Observatory PHA & NEO Asteroid News

Monthly close-approach summary · JPL SBDB CAD · September 2026

Near-Earth Object (NEO) and PHA Asteroid Close-Approach Summary: Looking back at September 2026

Earth close-approaches from 1–30 September 2026 inside 0.05 au (about 19.5 lunar distances), from the NASA/JPL SBDB Close Approach Data API. This is a month catalogue, not a live CNEOS Scout or Sentry stream. Live Multi-watch CAD/Scout/Sentry tracker.

In September 2026, the JPL close-approach catalogue records 165 Earth encounters inside the 0.05 au filter. Thirteen passed inside one lunar distance. The closest was 2026 RT34 (pictured) on 13 September, at 0.055 lunar distances (20,965 km from Earth’s centre, about 14,600 km above the surface) and 13.1 km/s. 2026 SZ2 matched that miss distance a week later. No listed object was on an impacting trajectory.

A Look-back at the Closest catalogued approaches in September 2026

2026 RT34

0.055 LD

20,965 km · 0.000140 au · v_rel 13.08 km/s · tied with 2026 SZ2

Earth surface1 LD (Moon)

Encounter (UTC)

2026-Sep-13 09:08

Est. diameter

3 m (H 30.4, pv 0.14)

Diameter range

2.3 – 5.0 m

Earth radii

3.3 R(E)

Passes inside 1 lunar distance

Sorted by miss distance. Diameter is the Bowell range, albedo 0.25–0.05. None of these thirteen is a PHA.

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2026 RT34	2026-Sep-13 09:08	0.055	20,965	13.1	2–5 m	Routine
2026 SZ2	2026-Sep-20 21:19	0.055	21,210	8.0	2–5 m	Routine
2026 RG15	2026-Sep-15 07:36	0.246	94,698	9.1	16–35 m	Routine
2026 SB	2026-Sep-15 04:52	0.329	126,288	14.6	6–14 m	Routine
2026 RZ	2026-Sep-03 00:06	0.529	203,497	11.2	3–7 m	Routine
2026 RN2	2026-Sep-08 13:51	0.577	221,987	12.1	4–8 m	Routine
2026 RH10	2026-Sep-10 06:39	0.646	248,260	18.2	10–23 m	Routine
2026 RO39	2026-Sep-14 07:44	0.662	254,498	10.5	4–8 m	Routine
2026 RC	2026-Sep-03 23:09	0.757	291,087	6.2	5–10 m	Routine
2026 RH1	2026-Sep-02 21:59	0.867	333,188	8.7	5–12 m	Routine
2026 RS2	2026-Sep-06 19:09	0.927	356,240	7.4	3–6 m	Routine
2026 SA8	2026-Sep-28 06:45	0.988	379,868	6.6	5–11 m	Routine
2026 RB39	2026-Sep-17 02:29	0.999	384,180	9.3	5–11 m	Routine

Lead object orbital dossier

2026 RT34

Heliocentric osculating elements from JPL SBDB, epoch JD 2461200.5. Dynamical class: APO (Near-Earth asteroid orbits which cross the Earth’s orbit similar to that of 1862 Apollo). Not a potentially hazardous asteroid. Absolute magnitude H = 30.36.

Semi-major axis a

1.02 au

Eccentricity e

0.394

Inclination i

0.675 deg

Orbital period

1.03 yr

Asc. node Ω

350 deg

Arg. perihelion ω

112 deg

JPL Small-Body Database record: ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2026 RT34

Potentially hazardous asteroids in the month

PHA is a size and orbit-class flag (H ≤ 22 and Earth MOID ≤ 0.05 au), not this month’s miss distance. All three September PHA approaches stayed outside 12 LD.

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2026 OH3	2026-Sep-11 04:27	12.31	4,731,250	20.2	0.14–0.32 km	PHA
2026 RF10	2026-Sep-02 09:00	13.45	5,171,080	17.1	0.11–0.26 km	PHA
2026 NT2	2026-Sep-17 05:07	16.09	6,182,950	12.5	0.23–0.52 km	PHA

Month analysis · JPL CAD clock

The September window contains 165 catalogued Earth close-approaches inside 0.05 au. Thirteen were sub-lunar, led by 2026 RT34 and 2026 SZ2 at 0.055 LD — both a few metres across, and both non-PHA. The largest sub-lunar body was 2026 RG15, about 16–35 m, at 0.25 LD on 15 September. Three objects carry a PHA flag; the nearest of those, 2026 OH3, missed by 12.3 LD. Median miss distance was 5.73 LD. Fastest relative velocity was 26.9 km/s (2026 SL7, 17.6 LD). No listed object is on an impacting trajectory.

Approaches in month

165

Inside 1 LD

13

Inside 5 LD

66

PHA in window

3

Median miss

5.73 LD

Fastest v_rel

26.9 km/s

Closest object

2026 RT34

Closest PHA

2026 OH3

Methodology

Distances and epochs are nominal JPL close-approach solutions. Lunar distance is 384,400 km; 1 au is 149,597,870.7 km. Diameter is not a measured size: it is the Bowell range D[km] = 1329 / sqrt(pv) × 10^(−H/5), pv 0.25–0.05, with a midpoint at pv 0.14. PHA status is the JPL flag from the CAD query, not a function of September’s miss distance.

Reporting style follows the Astrophyzix Orbital Refinement System.

Methodology documents

• Daily NEO Reporting Methodology
  DOI: 10.5281/zenodo.22868834
• Orbital Refinement System & Orbital Viewer Documentation
  DOI: 10.5281/zenodo.23049067

Data provenance

Compiled (UTC): 2026-10-03
Window: 2026-09-01 to 2026-10-01, Earth, dist-max 0.05 au
Source 1: NASA/JPL SBDB Close Approach Data API
  endpoint: https://ssd-api.jpl.nasa.gov/cad.api?date-min=2026-09-01&date-max=2026-10-01&dist-max=0.05&fullname=true
  docs: ssd-api.jpl.nasa.gov/doc/cad.html
  count: 165
Source 2: same API, pha=true
  count: 3 (2026 OH3, 2026 RF10, 2026 NT2)
Source 3: JPL SBDB lookup for 2026 RT34
  endpoint: https://ssd-api.jpl.nasa.gov/sbdb.api?sstr=2026%20RT34
  spkid: 54653909 · orbit class APO · pha false
Constants:
  - AU = 149597870.7 km (IAU 2012 Resolution B2)
  - Lunar distance = 384400 km (JPL/IAU nominal mean)
  - Earth mean radius = 6371 km (IUGG)
Source note: For live CNEOS Scout and Sentry use the Dual-watch tracker: astrophyzix.com/p/live-asteroid-tracker-v9.html

Primary references: NASA/JPL CNEOS Close Approach Data (cneos.jpl.nasa.gov/ca), SBDB (ssd.jpl.nasa.gov). Object hazard status should be verified against the CNEOS Sentry table. Nominal miss distances can shift for short-arc discoveries.

03 October 2026 Asteroid Close Approach Report

Astrophyzix Observatory PHA & NEO Asteroid News

Daily Asteroid Bulletin · NASA NeoWs catalogue · UTC

Near-Earth Object (NEO) and PHA Asteroid Close-Approach Report: October 3, 2026

Catalogued Earth close-approaches across a 7-day window from the NASA NeoWs feed (JPL small-body solutions; cached at source). This bulletin is a catalogue report, not a live CNEOS CAD/Scout stream. Live Multi-watch CAD/Scout/Sentry tracker.

On October 3, 2026 (UTC), screening of the NASA NeoWs catalogue resolves 41 near-Earth object close approaches across the report window. The single closest encounter is 2015 TS238, passing at approximately 4.72 lunar distances (1,813,910 km) with a relative velocity near 15.8 km/s. No listed object is on an impacting trajectory.

Closest catalogued approach in observation window

2015 TS238

4.72 LD

1,813,910 km · 0.012125 au · v_rel 15.81 km/s

Earth surface19.5 LD (filter edge)

Encounter (UTC)

2026-Oct-08 17:12

Est. diameter

0.033 km (NeoWs)

Diameter range

0.022 – 0.049 km

Earth radii

285 R(E)

Close approaches on report date

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2019 SW5	2026-Oct-03 12:00	39.56	15,214,652	17.2	0.037	Routine
2006 HZ5	2026-Oct-03 16:31	150.71	57,958,790	6.9	0.050	Routine

Lead object orbital dossier

2015 TS238

Heliocentric osculating elements from NeoWs, epoch JD 2461000.5. Dynamical class: APO (Near-Earth asteroid orbits which cross the Earth’s orbit similar to that of 1862 Apollo).

Semi-major axis a

1.1434 au

Eccentricity e

0.4994

Inclination i

3.324 deg

Orbital period

1.223 yr

Asc. node Ω

190.989 deg

Arg. perihelion ω

78.226 deg

JPL Small-Body Database record: ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3730801

7-day forward outlook — scroll left/right

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2009 UD	2026-Oct-04 07:03	122.78	47,218,840	12.7	0.014	Routine
2019 UM8	2026-Oct-04 11:49	161.15	61,974,605	18.2	0.008	Routine
2017 WK15	2026-Oct-04 20:07	170.38	65,522,606	17.0	0.018	Routine
2015 XX169	2026-Oct-05 03:10	89.22	34,312,498	5.3	0.013	Routine
2001 SH276	2026-Oct-05 03:48	54.38	20,913,691	10.8	0.458	Routine
2007 UW1	2026-Oct-05 10:14	32.97	12,677,806	4.7	0.115	Routine
2017 SX20	2026-Oct-06 02:26	164.94	63,429,518	16.0	0.059	Routine
2017 EJ3	2026-Oct-06 06:59	98.96	38,056,500	6.9	0.090	Routine
2012 KT42	2026-Oct-06 07:01	87.82	33,774,141	11.7	0.006	Routine
2018 TZ1	2026-Oct-06 12:34	113.51	43,654,128	13.8	0.040	Routine
2010 SJ	2026-Oct-06 17:40	192.67	74,094,317	19.4	0.069	Routine
2018 SL1	2026-Oct-06 19:16	122.09	46,951,512	12.2	0.024	Routine
2018 AG12	2026-Oct-06 20:09	166.79	64,143,759	8.4	0.072	Routine
2013 TH	2026-Oct-07 03:38	50.67	19,486,769	6.9	0.069	Routine
2018 CH	2026-Oct-07 04:24	194.03	74,617,494	19.4	0.021	Routine
1998 SL36	2026-Oct-07 04:47	154.97	59,595,365	22.5	0.359	PHA
660096 (1998 SL36)	2026-Oct-07 04:47	154.97	59,595,365	22.5	0.358	PHA
2018 HK	2026-Oct-07 06:54	69.68	26,795,958	20.4	0.204	Routine
2015 FD35	2026-Oct-07 19:14	70.91	27,269,809	17.4	0.287	Routine
2005 TQ45	2026-Oct-07 23:08	149.34	57,430,728	19.4	0.030	Routine

Astrophyzix analysis · same clock as the feed

The window contains 41 catalogued Earth close-approaches (2 on the report date, 39 in the forward outlook). The nearest listed geometry is 2015 TS238 at 4.72 LD (non-PHA), relative velocity 15.8 km/s. 1 additional pass inside 5 LD. 4 objects in the window are flagged potentially hazardous (size and MOID criteria, not this week's miss distance). No listed object is on an impacting trajectory in this catalogue.

Approaches in window

41

On report date

2

PHA in window

4

Inside 1 LD

0

Inside 5 LD

1

Median miss

121.67 LD

Fastest v_rel

25.8 km/s

Closest object

2015 TS238

Methodology

Data are reproducible using the Astrophyzix Orbital Refinement System.

Methodology documents

• Daily NEO Reporting Methodology
  DOI: 10.5281/zenodo.22868834
• Orbital Refinement System & Orbital Viewer Documentation
  DOI: 10.5281/zenodo.23049067

Data provenance

Module: Astrophyzix-NEO-Daily/2.2.0
Generated (UTC): 2026-10-03T00:20:11.914Z
Cache state: HIT (age 0 min)
Analysis digest: 41 approaches (2 today / 39 outlook); closest 2015 TS238 @ 4.72 LD; PHA 4; sub-lunar 0; notable 1; median miss 121.67 LD; anomalies 0
Analysis generated (UTC): 2026-10-03T00:20:11.914Z
Source 1: NASA NeoWs feed
  endpoint: https://api.nasa.gov/neo/rest/v1/feed?start_date=2026-10-03&end_date=2026-10-10&api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-10-03T00:19:45.013Z
Source 2: NASA NeoWs lookup
  endpoint: https://api.nasa.gov/neo/rest/v1/neo/3730801?api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-10-03T00:19:47.050Z
Constants:
  - AU = 149597870.7 km (IAU 2012 Resolution B2)
  - Lunar distance = 384400 km (JPL/IAU nominal mean)
  - Earth mean radius = 6371 km (IUGG)
  - TT − UTC = 69.184 s (37 leap seconds + 32.184 s), valid 2026
  - Diameter self-test: D[km] = 1329 / sqrt(pv) * 10^(−H/5), pv 0.25–0.05 (Bowell)
Source note: For live CNEOS Scout and JPL Close Approach Data use the Dual-watch PHA and NEO Tracking System: astrophyzix.com/p/live-asteroid-tracker-v9.html
Pipeline trace: INIT@627ms → CACHE_LOOKUP@628ms → PARSE@901ms → COMPUTE@902ms → VALIDATE@902ms → ANALYSE@903ms → RENDER@903ms

Primary references: NASA NeoWs / api.nasa.gov (api.nasa.gov), NASA CNEOS (cneos.jpl.nasa.gov). Object hazard status should be verified against the CNEOS Sentry table.

02 October 2026 Close Approach Report

 Astrophyzix Observatory PHA & NEO Asteroid News

Daily Asteroid Bulletin · NASA NeoWs catalogue · UTC

Near-Earth Object (NEO) and PHA Asteroid Close-Approach Report: October 2, 2026

Catalogued Earth close-approaches across a 7-day window from the NASA NeoWs feed (JPL small-body solutions; cached at source). This bulletin is a catalogue report, not a live CNEOS CAD/Scout stream. Live Multi-watch CAD/Scout/Sentry tracker.

On October 2, 2026 (UTC), screening of the NASA NeoWs catalogue resolves 40 near-Earth object close approaches across the report window. The single closest encounter is 2015 TS238, passing at approximately 4.72 lunar distances (1,813,910 km) with a relative velocity near 15.8 km/s. No listed object is on an impacting trajectory.

CLOSEST CATALOGUED APPROACH IN OBSERVATION WINDOW

2015 TS238

4.72 LD

1,813,910 km · 0.012125 au · v_rel 15.81 km/s

EARTH SURFACE19.5 LD (FILTER EDGE)

Encounter (UTC)

2026-Oct-08 17:12

Est. diameter

0.033 km (NeoWs)

Diameter range

0.022 - 0.049 km

Earth radii

285 R(E)

Close Approaches On Report Date

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2013 HO11	2026-Oct-02 01:49	25.24	9,705,469	7.6	0.097	ROUTINE
276891 (2004 RH340	2026-Oct-02 10:15	141.19	54,297,103	17.3	0.494	ROUTINE
2018 RV3	2026-Oct-02 09:40	149.92	57,656,025	10.4	0.098	ROUTINE
2007 DX60	2026-Oct-02 09:18	169.08	65,023,415	6.3	0.142	ROUTINE
2010 KV7	2026-Oct-02 09:57	174.55	67,127,830	18.7	0.025	ROUTINE

Lead Object Orbital Dossier

2015 TS238

Heliocentric osculating elements from NeoWs, epoch JD 2461000.5. Dynamical class: APO (Near-Earth asteroid orbits which cross the Earth’s orbit similar to that of 1862 Apollo).

Semi-major axis a

1.1434 au

Eccentricity e

0.4994

Inclination i

3.324 deg

Orbital period

1.223 yr

Asc. node OM

190.989 deg

Arg. perihelion w

78.226 deg

JPL Small-Body Database record: https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3730801

7-Day Forward Outlook - Scroll Left/Right

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2019 SW5	2026-Oct-03 12:00	39.56	15,214,652	17.2	0.037	ROUTINE
2006 HZ5	2026-Oct-03 16:31	150.71	57,958,790	6.9	0.050	ROUTINE
2009 UD	2026-Oct-04 07:03	122.78	47,218,840	12.7	0.014	ROUTINE
2019 UM8	2026-Oct-04 11:49	161.15	61,974,605	18.2	0.008	ROUTINE
2017 WK15	2026-Oct-04 20:07	170.38	65,522,606	17.0	0.018	ROUTINE
2015 XX169	2026-Oct-05 03:10	89.22	34,312,498	5.3	0.013	ROUTINE
2001 SH276	2026-Oct-05 03:48	54.38	20,913,691	10.8	0.458	ROUTINE
2007 UW1	2026-Oct-05 10:14	32.97	12,677,806	4.7	0.115	ROUTINE
2017 SX20	2026-Oct-06 02:26	164.94	63,429,518	16.0	0.059	ROUTINE
2017 EJ3	2026-Oct-06 06:59	98.96	38,056,500	6.9	0.090	ROUTINE
2012 KT42	2026-Oct-06 07:01	87.82	33,774,141	11.7	0.006	ROUTINE
2018 TZ1	2026-Oct-06 12:34	113.51	43,654,128	13.8	0.040	ROUTINE
2010 SJ	2026-Oct-06 17:40	192.67	74,094,317	19.4	0.069	ROUTINE
2018 SL1	2026-Oct-06 19:16	122.09	46,951,512	12.2	0.024	ROUTINE
2018 AG12	2026-Oct-06 20:09	166.79	64,143,759	8.4	0.072	ROUTINE
2013 TH	2026-Oct-07 03:38	50.67	19,486,769	6.9	0.069	ROUTINE
2018 CH	2026-Oct-07 04:24	194.03	74,617,494	19.4	0.021	ROUTINE
1998 SL36	2026-Oct-07 04:47	154.97	59,595,365	22.5	0.359	PHA
660096 (1998 SL36	2026-Oct-07 04:47	154.97	59,595,365	22.5	0.358	PHA
2018 HK	2026-Oct-07 06:54	69.68	26,795,958	20.4	0.204	ROUTINE

Astrophyzix analysis · same clock as the feed

The window contains 40 catalogued Earth close-approaches (5 on the report date, 35 in the forward outlook). The nearest listed geometry is 2015 TS238 at 4.72 LD (non-PHA), relative velocity 15.8 km/s. 1 additional pass inside 5 LD. 3 objects in the window are flagged potentially hazardous (size and MOID criteria, not this week's miss distance). No listed object is on an impacting trajectory in this catalogue.

Approaches in window

40

On report date

5

PHA in window

3

Inside 1 LD

0

Inside 5 LD

1

Median miss

124.49 LD

Fastest v_rel

22.5 km/s

Closest object

2015 TS238

Data are reproducible using the Astrophyzix Orbital Refinement System

Methodology documents

•Daily NEO Reporting Methodology

DOI: https://doi.org/10.5281/zenodo.22868834

•Orbital Refinement System & Orbital Viewer Documentation

DOI: https://doi.org/10.5281/zenodo.23049067

Data Provenance

Module: Astrophyzix-NEO-Daily 2.2.0 with ORB-01 Imagary
Generated (UTC): 2026-10-02T08:11:33.113Z
Cache state: MISS
Analysis digest: 40 approaches (5 today / 35 outlook); closest 2015 TS238 @ 4.72 LD; PHA 3; sub-lunar 0; notable 1; median miss 124.49 LD; anomalies 0
Analysis generated (UTC): 2026-10-02T08:11:33.113Z
Source 1: NASA NeoWs feed
  endpoint: https://api.nasa.gov/neo/rest/v1/feed?start_date=2026-10-02&end_date=2026-10-09&api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-10-02T08:11:33.532Z
Source 2: NASA NeoWs lookup
  endpoint: https://api.nasa.gov/neo/rest/v1/neo/3730801?api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-10-02T08:11:35.131Z
Constants:
  - AU = 149597870.7 km (IAU 2012 Resolution B2)
  - Lunar distance = 384400 km (JPL/IAU nominal mean)
  - Earth mean radius = 6371 km (IUGG)
  - TT - UTC = 69.184 s (37 leap seconds + 32.184 s), valid 2026
  - Diameter self-test: D[km] = 1329 / sqrt(pv) * 10^(-H/5), pv 0.25-0.05 (Bowell)
Source note: For live CNEOS Scout and JPL Close Approach Data use the Dual-watch PHA and NEO Tracking System: https://www.astrophyzix.com/p/live-asteroid-tracker-v9.html
Pipeline trace: INIT@1328ms -> CACHE_LOOKUP@1339ms -> FETCH_FEED@1748ms -> FETCH_ENRICH@2951ms -> PARSE@3348ms -> COMPUTE@3356ms -> VALIDATE@3356ms -> ANALYSE@3358ms -> RENDER@3359ms

Primary references: NASA NeoWs / api.nasa.gov (api.nasa.gov), NASA CNEOS (cneos.jpl.nasa.gov). Object hazard status should be verified against the CNEOS Sentry table.