メタデータ
| 項目 |
値 |
| Designation |
450P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2027-01-21T05:07:39.394560Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:26Z |
| Obs used |
963 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
11.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2004-01-13T06:33:13.248000Z |
| Discovery magnitude (MPC) |
18.40 N |
| Discovery observatory (MPC) |
699 · Lowell Observatory-LONEOS |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-01-25.0000000 |
| e |
0.31136698 |
| q (au) |
5.465121 |
| a (au) |
7.936188 |
| i (deg) |
10.559466 |
| Ω (om, deg) |
124.902793 |
| ω (w, deg) |
21.730541 |
| M (ma, deg) |
215.261080 |
等級
散乱 + 全体線形
$$
M_a = (3.089 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.089 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.939 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2022-08-21 |
2026-09-25 |
+9.7699 |
-7.376 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:38:30.57 |
+16:12:38.0 |
HIP 47196 |
19.95 |
| 2026-09-20 12:00 |
09:38:55.20 |
+16:11:09.4 |
HIP 47196 |
25.95 |
| 2026-09-21 00:00 |
09:39:19.77 |
+16:09:41.0 |
HIP 47196 |
31.98 |
| 2026-09-21 12:00 |
09:39:44.28 |
+16:08:12.8 |
HIP 47557 |
37.16 |
| 2026-09-22 00:00 |
09:40:08.74 |
+16:06:44.8 |
HIP 47557 |
31.72 |
| 2026-09-22 12:00 |
09:40:33.13 |
+16:05:17.1 |
HIP 47557 |
26.57 |
| 2026-09-23 00:00 |
09:40:57.46 |
+16:03:49.5 |
HIP 47557 |
21.88 |
| 2026-09-23 12:00 |
09:41:21.73 |
+16:02:22.3 |
HIP 47557 |
18.03 |
| 2026-09-24 00:00 |
09:41:45.94 |
+16:00:55.2 |
HIP 47557 |
15.61 |
| 2026-09-24 12:00 |
09:42:10.09 |
+15:59:28.4 |
HIP 47557 |
15.30 |
| 2026-09-25 00:00 |
09:42:34.17 |
+15:58:01.8 |
HIP 47557 |
17.20 |
| 2026-09-25 12:00 |
09:42:58.20 |
+15:56:35.5 |
HIP 47557 |
20.71 |
| 2026-09-26 00:00 |
09:43:22.15 |
+15:55:09.5 |
HIP 47557 |
25.13 |
| 2026-09-26 12:00 |
09:43:46.05 |
+15:53:43.7 |
HIP 47557 |
30.08 |
| 2026-09-27 00:00 |
09:44:09.87 |
+15:52:18.1 |
HIP 47784 |
33.04 |
| 2026-09-27 12:00 |
09:44:33.64 |
+15:50:52.9 |
HIP 47784 |
33.94 |
| 2026-09-28 00:00 |
09:44:57.33 |
+15:49:27.9 |
HIP 47784 |
35.79 |
| 2026-09-28 12:00 |
09:45:20.96 |
+15:48:03.2 |
HIP 48006 |
30.64 |
| 2026-09-29 00:00 |
09:45:44.52 |
+15:46:38.8 |
HIP 48006 |
25.16 |
| 2026-09-29 12:00 |
09:46:08.02 |
+15:45:14.7 |
HIP 48006 |
19.90 |
| 2026-09-30 00:00 |
09:46:31.44 |
+15:43:50.9 |
HIP 48006 |
15.08 |
| 2026-09-30 12:00 |
09:46:54.80 |
+15:42:27.4 |
HIP 48006 |
11.25 |
| 2026-10-01 00:00 |
09:47:18.08 |
+15:41:04.2 |
HIP 48006 |
9.64 |
| 2026-10-01 12:00 |
09:47:41.30 |
+15:39:41.3 |
HIP 48006 |
11.21 |
| 2026-10-02 00:00 |
09:48:04.44 |
+15:38:18.8 |
HIP 48151 |
13.04 |
| 2026-10-02 12:00 |
09:48:27.52 |
+15:36:56.5 |
HIP 48151 |
7.37 |
| 2026-10-03 00:00 |
09:48:50.51 |
+15:35:34.6 |
HIP 48151 |
2.01 |
| 2026-10-03 12:00 |
09:49:13.44 |
+15:34:13.1 |
HIP 48151 |
4.33 |
| 2026-10-04 00:00 |
09:49:36.29 |
+15:32:51.9 |
HIP 48151 |
9.89 |
| 2026-10-04 12:00 |
09:49:59.07 |
+15:31:31.1 |
HIP 48151 |
15.51 |
| 2026-10-05 00:00 |
09:50:21.77 |
+15:30:10.6 |
HIP 48151 |
21.12 |
| 2026-10-05 12:00 |
09:50:44.39 |
+15:28:50.5 |
HIP 48151 |
26.73 |
| 2026-10-06 00:00 |
09:51:06.94 |
+15:27:30.8 |
HIP 48467 |
27.18 |
| 2026-10-06 12:00 |
09:51:29.41 |
+15:26:11.4 |
HIP 48467 |
22.34 |
| 2026-10-07 00:00 |
09:51:51.80 |
+15:24:52.5 |
HIP 48467 |
17.94 |
| 2026-10-07 12:00 |
09:52:14.11 |
+15:23:33.9 |
HIP 48467 |
14.38 |
| 2026-10-08 00:00 |
09:52:36.34 |
+15:22:15.7 |
HIP 48467 |
12.35 |
| 2026-10-08 12:00 |
09:52:58.49 |
+15:20:58.0 |
HIP 48467 |
12.61 |
| 2026-10-09 00:00 |
09:53:20.55 |
+15:19:40.7 |
HIP 48467 |
15.01 |
| 2026-10-09 12:00 |
09:53:42.54 |
+15:18:23.8 |
HIP 48467 |
18.74 |
| 2026-10-10 00:00 |
09:54:04.44 |
+15:17:07.3 |
HIP 48467 |
23.13 |
| 2026-10-10 12:00 |
09:54:26.25 |
+15:15:51.2 |
HIP 48467 |
27.88 |
| 2026-10-11 00:00 |
09:54:47.98 |
+15:14:35.7 |
HIP 48467 |
32.81 |