450P/LONEOS
メタデータ
| 項目 |
値 |
| Designation |
450P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2027-01-15T10:52:21.558720Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:54Z |
| Obs used |
716 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
11.500 |
| 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) |
2016-08-17.0000000 |
| e |
0.31241605 |
| q (au) |
5.452936 |
| a (au) |
7.930575 |
| i (deg) |
10.567225 |
| Ω (om, deg) |
124.932530 |
| ω (w, deg) |
21.677758 |
| M (ma, deg) |
192.148554 |
等級
散乱 + 全体線形
$$
M_a = (3.075 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.075 |
| n |
6.000 |
| gf |
0.996 |
| gb |
-0.502 |
| 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 |
2024-02-11 |
+45.0165 |
-37.596 |
| 2024-02-11 |
2026-01-24 |
+8.0585 |
-6.399 |
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) |
| 2026-02-03 00:00 |
07:36:53.18 |
+19:48:43.5 |
HIP 36925 |
20.43 |
| 2026-02-03 12:00 |
07:36:40.71 |
+19:49:50.3 |
HIP 36925 |
17.44 |
| 2026-02-04 00:00 |
07:36:28.33 |
+19:50:56.9 |
HIP 36925 |
14.54 |
| 2026-02-04 12:00 |
07:36:16.05 |
+19:52:03.2 |
HIP 36925 |
11.77 |
| 2026-02-05 00:00 |
07:36:03.86 |
+19:53:09.3 |
HIP 36925 |
9.23 |
| 2026-02-05 12:00 |
07:35:51.78 |
+19:54:15.2 |
HIP 36925 |
7.14 |
| 2026-02-06 00:00 |
07:35:39.81 |
+19:55:20.8 |
HIP 36925 |
5.94 |
| 2026-02-06 12:00 |
07:35:27.94 |
+19:56:26.2 |
HIP 36925 |
6.16 |
| 2026-02-07 00:00 |
07:35:16.17 |
+19:57:31.3 |
HIP 36925 |
7.63 |
| 2026-02-07 12:00 |
07:35:04.52 |
+19:58:36.2 |
HIP 36925 |
9.80 |
| 2026-02-08 00:00 |
07:34:52.98 |
+19:59:40.8 |
HIP 36925 |
12.27 |
| 2026-02-08 12:00 |
07:34:41.55 |
+20:00:45.1 |
HIP 36925 |
14.88 |
| 2026-02-09 00:00 |
07:34:30.25 |
+20:01:49.2 |
HIP 36925 |
17.55 |
| 2026-02-09 12:00 |
07:34:19.06 |
+20:02:52.9 |
HIP 36894 |
19.84 |
| 2026-02-10 00:00 |
07:34:07.99 |
+20:03:56.4 |
HIP 36894 |
20.65 |
| 2026-02-10 12:00 |
07:33:57.04 |
+20:04:59.5 |
HIP 36894 |
21.78 |
| 2026-02-11 00:00 |
07:33:46.22 |
+20:06:02.4 |
HIP 36894 |
23.16 |
| 2026-02-11 12:00 |
07:33:35.53 |
+20:07:05.0 |
HIP 36894 |
24.75 |
| 2026-02-12 00:00 |
07:33:24.97 |
+20:08:07.2 |
HIP 36607 |
26.09 |
| 2026-02-12 12:00 |
07:33:14.53 |
+20:09:09.2 |
HIP 36607 |
24.31 |
| 2026-02-13 00:00 |
07:33:04.23 |
+20:10:10.8 |
HIP 36607 |
22.73 |
| 2026-02-13 12:00 |
07:32:54.07 |
+20:11:12.1 |
HIP 36607 |
21.38 |
| 2026-02-14 00:00 |
07:32:44.04 |
+20:12:13.0 |
HIP 36607 |
20.29 |
| 2026-02-14 12:00 |
07:32:34.16 |
+20:13:13.7 |
HIP 36607 |
19.49 |
| 2026-02-15 00:00 |
07:32:24.41 |
+20:14:13.9 |
HIP 36607 |
19.01 |
| 2026-02-15 12:00 |
07:32:14.81 |
+20:15:13.9 |
HIP 36607 |
18.87 |
| 2026-02-16 00:00 |
07:32:05.35 |
+20:16:13.5 |
HIP 36607 |
19.05 |
| 2026-02-16 12:00 |
07:31:56.04 |
+20:17:12.7 |
HIP 36607 |
19.53 |
| 2026-02-17 00:00 |
07:31:46.87 |
+20:18:11.6 |
HIP 36506 |
19.53 |
| 2026-02-17 12:00 |
07:31:37.86 |
+20:19:10.1 |
HIP 36506 |
17.24 |
| 2026-02-18 00:00 |
07:31:29.00 |
+20:20:08.3 |
HIP 36506 |
15.01 |
| 2026-02-18 12:00 |
07:31:20.29 |
+20:21:06.1 |
HIP 36506 |
12.82 |
| 2026-02-19 00:00 |
07:31:11.74 |
+20:22:03.5 |
HIP 36506 |
10.70 |
| 2026-02-19 12:00 |
07:31:03.34 |
+20:23:00.5 |
HIP 36506 |
8.65 |
| 2026-02-20 00:00 |
07:30:55.10 |
+20:23:57.1 |
HIP 36506 |
6.72 |
| 2026-02-20 12:00 |
07:30:47.03 |
+20:24:53.4 |
HIP 36506 |
4.98 |
| 2026-02-21 00:00 |
07:30:39.11 |
+20:25:49.3 |
HIP 36506 |
3.68 |
| 2026-02-21 12:00 |
07:30:31.35 |
+20:26:44.7 |
HIP 36506 |
3.27 |
| 2026-02-22 00:00 |
07:30:23.76 |
+20:27:39.8 |
HIP 36506 |
4.00 |
| 2026-02-22 12:00 |
07:30:16.34 |
+20:28:34.5 |
HIP 36506 |
5.37 |
| 2026-02-23 00:00 |
07:30:09.08 |
+20:29:28.8 |
HIP 36506 |
6.99 |
| 2026-02-23 12:00 |
07:30:01.99 |
+20:30:22.6 |
HIP 36506 |
8.70 |
| 2026-02-24 00:00 |
07:29:55.06 |
+20:31:16.1 |
HIP 36506 |
10.42 |