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
$$
M_a = (3.085 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.085 |
| 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 |
2026-04-09 |
+10.0246 |
-7.575 |
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) |
| 2026-07-29 00:00 |
08:51:32.28 |
+18:51:54.8 |
HIP 43540 |
7.61 |
| 2026-07-29 12:00 |
08:51:59.72 |
+18:50:31.0 |
HIP 43540 |
3.27 |
| 2026-07-30 00:00 |
08:52:27.17 |
+18:49:07.0 |
HIP 43540 |
7.20 |
| 2026-07-30 12:00 |
08:52:54.61 |
+18:47:42.8 |
HIP 43540 |
13.46 |
| 2026-07-31 00:00 |
08:53:22.06 |
+18:46:18.3 |
HIP 43540 |
19.97 |
| 2026-07-31 12:00 |
08:53:49.51 |
+18:44:53.6 |
HIP 43540 |
26.56 |
| 2026-08-01 00:00 |
08:54:16.96 |
+18:43:28.6 |
HIP 43540 |
33.17 |
| 2026-08-01 12:00 |
08:54:44.41 |
+18:42:03.4 |
HIP 43540 |
39.79 |
| 2026-08-02 00:00 |
08:55:11.86 |
+18:40:38.0 |
HIP 43540 |
46.43 |
| 2026-08-02 12:00 |
08:55:39.31 |
+18:39:12.4 |
HIP 44056 |
43.01 |
| 2026-08-03 00:00 |
08:56:06.76 |
+18:37:46.5 |
HIP 44056 |
36.67 |
| 2026-08-03 12:00 |
08:56:34.21 |
+18:36:20.4 |
HIP 44056 |
30.46 |
| 2026-08-04 00:00 |
08:57:01.65 |
+18:34:54.1 |
HIP 44056 |
24.48 |
| 2026-08-04 12:00 |
08:57:29.10 |
+18:33:27.5 |
HIP 44056 |
18.97 |
| 2026-08-05 00:00 |
08:57:56.54 |
+18:32:00.8 |
HIP 44056 |
14.47 |
| 2026-08-05 12:00 |
08:58:23.98 |
+18:30:33.8 |
HIP 44056 |
12.14 |
| 2026-08-06 00:00 |
08:58:51.41 |
+18:29:06.7 |
HIP 44056 |
13.20 |
| 2026-08-06 12:00 |
08:59:18.84 |
+18:27:39.3 |
HIP 44056 |
17.03 |
| 2026-08-07 00:00 |
08:59:46.26 |
+18:26:11.7 |
HIP 44126 |
19.96 |
| 2026-08-07 12:00 |
09:00:13.68 |
+18:24:43.9 |
HIP 44126 |
22.35 |
| 2026-08-08 00:00 |
09:00:41.10 |
+18:23:16.0 |
HIP 44126 |
26.27 |
| 2026-08-08 12:00 |
09:01:08.50 |
+18:21:47.8 |
HIP 44126 |
31.13 |
| 2026-08-09 00:00 |
09:01:35.90 |
+18:20:19.5 |
HIP 44126 |
36.57 |
| 2026-08-09 12:00 |
09:02:03.29 |
+18:18:51.0 |
HIP 44529 |
33.03 |
| 2026-08-10 00:00 |
09:02:30.67 |
+18:17:22.3 |
HIP 44529 |
26.47 |
| 2026-08-10 12:00 |
09:02:58.05 |
+18:15:53.4 |
HIP 44529 |
19.99 |
| 2026-08-11 00:00 |
09:03:25.41 |
+18:14:24.4 |
HIP 44529 |
13.68 |
| 2026-08-11 12:00 |
09:03:52.76 |
+18:12:55.2 |
HIP 44529 |
7.96 |
| 2026-08-12 00:00 |
09:04:20.10 |
+18:11:25.8 |
HIP 44529 |
5.33 |
| 2026-08-12 12:00 |
09:04:47.43 |
+18:09:56.3 |
HIP 44529 |
9.07 |
| 2026-08-13 00:00 |
09:05:14.75 |
+18:08:26.6 |
HIP 44529 |
14.99 |
| 2026-08-13 12:00 |
09:05:42.05 |
+18:06:56.8 |
HIP 44739 |
21.26 |
| 2026-08-14 00:00 |
09:06:09.34 |
+18:05:26.8 |
HIP 44749 |
15.11 |
| 2026-08-14 12:00 |
09:06:36.61 |
+18:03:56.7 |
HIP 44749 |
9.52 |
| 2026-08-15 00:00 |
09:07:03.87 |
+18:02:26.4 |
HIP 44749 |
6.42 |
| 2026-08-15 12:00 |
09:07:31.11 |
+18:00:56.0 |
HIP 44749 |
8.96 |
| 2026-08-16 00:00 |
09:07:58.34 |
+17:59:25.5 |
HIP 44749 |
14.42 |
| 2026-08-16 12:00 |
09:08:25.55 |
+17:57:54.9 |
HIP 44749 |
20.58 |
| 2026-08-17 00:00 |
09:08:52.74 |
+17:56:24.1 |
HIP 44749 |
26.97 |
| 2026-08-17 12:00 |
09:09:19.91 |
+17:54:53.3 |
HIP 44918 |
27.03 |
| 2026-08-18 00:00 |
09:09:47.07 |
+17:53:22.3 |
HIP 44918 |
27.35 |
| 2026-08-18 12:00 |
09:10:14.20 |
+17:51:51.2 |
HIP 45138 |
24.56 |
| 2026-08-19 00:00 |
09:10:41.32 |
+17:50:20.0 |
HIP 45138 |
19.74 |