Astrophyzix Observatory PHA & NEO Asteroid News

Daily Asteroid Bulletin · official NASA NeoWs Catalogue DATA · UTC

Near-Earth Object (NEO) and PHA Asteroid Close-Approach Report: September 28, 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 September 28, 2026 (UTC), screening of the NASA NeoWs catalogue resolves 34 near-Earth object close approaches across the report window. The single closest encounter is 2018 SP2, passing at approximately 5.01 lunar distances (1,927,097 km) with a relative velocity near 14.3 km/s. No listed object is on an impacting trajectory.

CLOSEST CATALOGUED APPROACH IN OBSERVATION WINDOW

2018 SP2

5.01 LD

1,927,097 km · 0.012882 au · v_rel 14.26 km/s

EARTH SURFACE19.5 LD (FILTER EDGE)

Encounter (UTC)

2026-Sep-30 20:54

Est. diameter

0.044 km (NeoWs)

Diameter range

0.029 - 0.065 km

Earth radii

302 R(E)

Close Approaches On Report Date

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
523934 (1998 FF14	2026-Sep-28 13:19	40.03	15,393,501	23.5	0.300	PHA
2017 GK4	2026-Sep-28 00:38	47.91	18,423,686	12.2	0.174	PHA
2015 EQ7	2026-Sep-28 09:53	76.68	29,487,899	6.3	0.076	ROUTINE
2004 TB10	2026-Sep-28 13:53	92.74	35,666,462	11.6	0.199	PHA
2014 SQ260	2026-Sep-28 12:00	102.36	39,365,624	12.3	0.062	ROUTINE
2016 FL12	2026-Sep-28 06:57	165.39	63,605,340	7.3	0.022	ROUTINE

Lead Object Orbital Dossier

2018 SP2

Heliocentric osculating elements from NeoWs, epoch JD 2461000.5. Dynamical class: ATE (Near-Earth asteroid orbits similar to that of 2062 Aten).

Semi-major axis a

0.9246 au

Eccentricity e

0.2055

Inclination i

26.825 deg

Orbital period

0.889 yr

Asc. node OM

187.202 deg

Arg. perihelion w

303.398 deg

JPL Small-Body Database record: https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3830890

7-Day Forward Outlook - Scroll Left/Right

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2013 TL	2026-Sep-29 03:21	124.73	47,966,664	19.1	0.144	ROUTINE
138971 (2001 CB21	2026-Sep-29 07:18	21.05	8,096,702	10.2	0.779	PHA
2014 FR37	2026-Sep-29 16:36	103.61	39,845,554	15.1	0.099	ROUTINE
2009 DC12	2026-Sep-29 20:11	167.81	64,533,049	6.1	0.105	ROUTINE
2010 TW54	2026-Sep-30 05:42	45.39	17,457,205	4.5	0.012	ROUTINE
2014 QJ33	2026-Sep-30 11:56	43.91	16,885,637	6.0	0.072	ROUTINE
2012 VT6	2026-Sep-30 15:24	59.17	22,754,832	6.4	0.095	ROUTINE
2002 PN6	2026-Sep-30 17:42	162.13	62,349,989	1.6	0.263	ROUTINE
2018 SP2	2026-Sep-30 20:54	5.01	1,927,097	14.3	0.044	ROUTINE
2018 LC1	2026-Oct-01 00:26	186.94	71,893,233	8.4	0.042	ROUTINE
2019 SD7	2026-Oct-01 04:23	113.04	43,473,504	8.5	0.072	ROUTINE
2014 RX22	2026-Oct-01 14:05	98.17	37,754,644	13.0	0.025	ROUTINE
499496 (2010 MR87	2026-Oct-01 15:58	73.71	28,345,944	18.8	0.505	ROUTINE
2016 FB	2026-Oct-01 17:42	167.49	64,412,687	11.1	0.073	ROUTINE
2008 TX3	2026-Oct-01 18:10	171.37	65,905,706	16.8	0.042	ROUTINE
2013 HO11	2026-Oct-02 01:49	25.24	9,705,469	7.6	0.097	ROUTINE
2007 DX60	2026-Oct-02 09:18	169.08	65,023,415	6.3	0.142	ROUTINE
2018 RV3	2026-Oct-02 09:40	149.92	57,656,025	10.4	0.098	ROUTINE
2010 KV7	2026-Oct-02 09:57	174.55	67,127,830	18.7	0.025	ROUTINE
276891 (2004 RH340	2026-Oct-02 10:15	141.19	54,297,103	17.3	0.494	ROUTINE

DETERMINISTIC analysis · same clock as the feed

The window contains 34 catalogued Earth close-approaches (6 on the report date, 28 in the forward outlook). The nearest listed geometry is 2018 SP2 at 5.01 LD (non-PHA), relative velocity 14.3 km/s. 4 objects in the window are flagged potentially hazardous (size and MOID criteria, not this week's miss distance). Astrophyzix can confirm that no listed object is reported to be on an impacting trajectory in this catalogue.

Approaches in window

On report date

PHA in window

Inside 1 LD

Inside 5 LD

Median miss

102.99 LD

Fastest v_rel

23.5 km/s

Closest object

2018 SP2

VERIFIABLE Data Provenance

Module: Astrophyzix-NEO-Daily/2.2.0
Generated (UTC): 2026-09-28T02:06:00.980Z
Cache state: MISS
Analysis digest: 34 approaches (6 today / 28 outlook); closest 2018 SP2 @ 5.01 LD; PHA 4; sub-lunar 0; notable 0; median miss 102.99 LD; anomalies 0
Analysis generated (UTC): 2026-09-28T02:06:00.980Z
Source 1: NASA NeoWs feed
  endpoint: https://api.nasa.gov/neo/rest/v1/feed?start_date=2026-09-28&end_date=2026-10-05&api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-28T02:06:01.271Z
Source 2: NASA NeoWs lookup
  endpoint: https://api.nasa.gov/neo/rest/v1/neo/3830890?api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-28T02:06:02.984Z
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.org/p/cneo-observatory.html
Pipeline trace: INIT@702ms -> CACHE_LOOKUP@703ms -> FETCH_FEED@993ms -> FETCH_ENRICH@2324ms -> PARSE@2707ms -> COMPUTE@2713ms -> VALIDATE@2713ms -> ANALYSE@2715ms -> RENDER@2721ms

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.

Astrophyzix Observatory. (2026). Astrophyzix Digital Observatory Daily Close Approach Report: Methods, Provenance and Limitations Documentation (Version 1). Astrophyzix Digital Observatory. https://doi.org/10.5281/zenodo.22868834
Astrophyzix Observatory. (2026). Astrophyzix Risk Index - A Heuristic Scoring System for Near-Earth Object Close Approach Visualisation (Version 2.0). Zenodo. https://doi.org/10.5281/zenodo.22240223