3I/ATLAS (C/2025 N1)

{
  "designation": "C/2025 N1 (ATLAS)",
  "epoch": "2461090.5",
  "elements": {
    "q": 1.36,
    "e": 6.14,
    "i": 175,
    "omega": 128,
    "node": 322,
    "M": 818,
    "tp": 2460977.995
  },
  "source": "JPL SBDB API - https://ssd-api.jpl.nasa.gov/sbdb.api?des=C%2F2025%20N1&phys-par=1 (retrieved 2026-03-01T08:14:59.793Z)",
  "raw": {
    "orbit": {
      "n_obs_used": 782,
      "n_del_obs_used": null,
      "two_body": null,
      "rms": "0.42",
      "last_obs": "2026-02-19",
      "moid": "0.365",
      "model_pars": [
        {
          "value": "5.32e-08",
          "desc": "non-gravitational radial acceleration parameter",
          "sigma": "1.22E-9",
          "kind": "EST",
          "units": "au/d^2",
          "n": 1,
          "name": "A1",
          "title": "non-grav. radial accel."
        },
        {
          "title": "non-grav. transverse accel.",
          "name": "A2",
          "n": 2,
          "units": "au/d^2",
          "kind": "EST",
          "sigma": "2.139E-9",
          "desc": "non-gravitational transverse acceleration parameter",
          "value": "1.148e-08"
        },
        {
          "sigma": "1.776E-10",
          "kind": "EST",
          "value": "-6.854e-09",
          "desc": "non-gravitational normal acceleration parameter",
          "title": "non-grav. normal accel.",
          "name": "A3",
          "units": "au/d^2",
          "n": 3
        },
        {
          "units": null,
          "n": 0,
          "title": "normalizing factor",
          "name": "ALN",
          "value": "1.",
          "desc": "normalizing factor [default 0.1112620426]",
          "sigma": null,
          "kind": "SET"
        },
        {
          "name": "DT",
          "title": "non-grav. perihelion offset",
          "units": "d",
          "n": 4,
          "sigma": "1.426",
          "kind": "EST",
          "value": "9.48",
          "desc": "non-gravitational perihelion-maximum offset"
        },
        {
          "sigma": null,
          "kind": "SET",
          "value": "0.",
          "desc": "non-grav. model constant, exponent k [default 4.6142]",
          "title": "non-grav. model exp. k",
          "name": "NK",
          "units": null,
          "n": 0
        },
        {
          "n": 0,
          "units": null,
          "name": "NM",
          "title": "non-grav. model exp. m",
          "desc": "non-grav. model constant, exponent m [default 2.15]",
          "value": "2.",
          "kind": "SET",
          "sigma": null
        },
        {
          "sigma": null,
          "kind": "SET",
          "value": "0.",
          "desc": "non-grav. model constant, exponent n [default 5.093]",
          "title": "non-grav. model exp. n",
          "name": "NN",
          "units": null,
          "n": 0
        },
        {
          "title": "normalizing distance",
          "name": "R0",
          "units": "au",
          "n": 0,
          "sigma": null,
          "kind": "SET",
          "value": "1.",
          "desc": "normalizing distance, au [default 2.808 au]"
        }
      ],
      "first_obs": "2025-05-15",
      "epoch": "2461090.5",
      "n_dop_obs_used": null,
      "data_arc": "280",
      "soln_date": "2026-02-19 09:10:47",
      "moid_jup": "0.247",
      "not_valid_before": null,
      "sb_used": "SB441-N16",
      "not_valid_after": null,
      "orbit_id": "54",
      "elements": [
        {
          "units": null,
          "label": "e",
          "name": "e",
          "title": "eccentricity",
          "value": "6.14",
          "sigma": "2.5e-05"
        },
        {
          "units": "au",
          "label": "a",
          "title": "semi-major axis",
          "name": "a",
          "value": "-0.264",
          "sigma": "7e-07"
        },
        {
          "sigma": "3.8e-06",
          "value": "1.36",
          "title": "perihelion distance",
          "name": "q",
          "label": "q",
          "units": "au"
        },
        {
          "value": "175",
          "sigma": "1.9e-05",
          "units": "deg",
          "label": "i",
          "name": "i",
          "title": "inclination; angle with respect to x-y ecliptic plane"
        },
        {
          "sigma": "7.1e-05",
          "value": "322",
          "title": "longitude of the ascending node",
          "name": "om",
          "units": "deg",
          "label": "node"
        },
        {
          "sigma": "0.0001",
          "value": "128",
          "name": "w",
          "title": "argument of perihelion",
          "units": "deg",
          "label": "peri"
        },
        {
          "title": "mean anomaly",
          "name": "ma",
          "units": "deg",
          "label": "M",
          "sigma": "0.0029",
          "value": "818"
        },
        {
          "name": "tp",
          "title": "time of perihelion passage",
          "label": "tp",
          "units": "TDB",
          "sigma": "5.1e-05",
          "value": "2460977.995"
        },
        {
          "units": "d",
          "label": "period",
          "name": "per",
          "title": "sidereal orbital period",
          "value": null,
          "sigma": null
        },
        {
          "title": "mean motion",
          "name": "n",
          "units": "deg/d",
          "label": "n",
          "sigma": "2.9e-05",
          "value": "7.27"
        },
        {
          "label": "Q",
          "units": "au",
          "name": "ad",
          "title": "aphelion distance",
          "value": null,
          "sigma": null
        }
      ],
      "condition_code": null,
      "pe_used": "DE441",
      "source": "JPL",
      "equinox": "J2000",
      "producer": "Davide Farnocchia",
      "cov_epoch": "2461090.5",
      "comment": "Nongravitational accels. using g(r) = (1 au/ r)^2 for CO2",
      "t_jup": null
    },
    "phys_par": [
      {
        "units": null,
        "notes": "2 parameter fit from 733 observations, autocmod 3.0g",
        "ref": "54",
        "title": "comet total magnitude",
        "name": "M1",
        "value": "12.5",
        "desc": "absolute magnitude of comet and coma (i.e. total)",
        "sigma": "0.9"
      },
      {
        "units": null,
        "ref": "54",
        "notes": "autocmod 3.0g",
        "title": "comet total magnitude slope",
        "name": "K1",
        "sigma": null,
        "desc": "comet total magnitude slope parameter",
        "value": "4.5"
      }
    ],
    "signature": {
      "version": "1.3",
      "source": "NASA/JPL Small-Body Database (SBDB) API"
    },
    "object": {
      "fullname": "C/2025 N1 (ATLAS)",
      "spkid": "1004083",
      "prefix": "C",
      "orbit_id": "54",
      "orbit_class": {
        "code": "HYP",
        "name": "Hyperbolic Comet"
      },
      "pha": false,
      "neo": false,
      "des": "2025 N1",
      "kind": "cu"
    }
  },
  "generated": "2026-03-01T08:14:59.794Z"
}