メタデータ
| 項目 |
値 |
| Designation |
110P/Hartley 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-12-16T16:15:29.649600Z |
| Orbit solution date (soln_date, UTC) |
2023-05-22T13:49:16Z |
| Obs used |
2416 |
| NEO |
- |
| M1 |
4.300 |
| K1 |
26.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-05-08.0000000 |
| e |
0.31628027 |
| q (au) |
2.464450 |
| a (au) |
3.604474 |
| i (deg) |
11.698362 |
| Ω (om, deg) |
287.529573 |
| ω (w, deg) |
167.395612 |
| M (ma, deg) |
178.350762 |
等級
散乱 + 全体線形
$$
M_a = (8.206 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.206 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.990 |
| 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 |
| 2019-07-25 |
2021-01-23 |
+34.4001 |
-14.061 |
| 2021-01-23 |
2023-05-13 |
-9.1575 |
+6.292 |
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 |
21:19:06.84 |
-07:49:09.5 |
HIP 105243 |
3.67 |
| 2026-07-29 12:00 |
21:18:47.05 |
-07:49:43.7 |
HIP 105243 |
4.98 |
| 2026-07-30 00:00 |
21:18:27.17 |
-07:50:18.8 |
HIP 105243 |
9.22 |
| 2026-07-30 12:00 |
21:18:07.20 |
-07:50:54.7 |
HIP 105204 |
13.91 |
| 2026-07-31 00:00 |
21:17:47.16 |
-07:51:31.4 |
HIP 105204 |
16.82 |
| 2026-07-31 12:00 |
21:17:27.03 |
-07:52:09.0 |
HIP 105051 |
16.82 |
| 2026-08-01 00:00 |
21:17:06.82 |
-07:52:47.4 |
HIP 105051 |
14.71 |
| 2026-08-01 12:00 |
21:16:46.54 |
-07:53:26.6 |
HIP 105051 |
14.18 |
| 2026-08-02 00:00 |
21:16:26.20 |
-07:54:06.5 |
HIP 105051 |
15.42 |
| 2026-08-02 12:00 |
21:16:05.78 |
-07:54:47.3 |
HIP 105051 |
18.07 |
| 2026-08-03 00:00 |
21:15:45.30 |
-07:55:28.8 |
HIP 104898 |
17.56 |
| 2026-08-03 12:00 |
21:15:24.77 |
-07:56:11.1 |
HIP 104898 |
14.97 |
| 2026-08-04 00:00 |
21:15:04.17 |
-07:56:54.2 |
HIP 104898 |
13.89 |
| 2026-08-04 12:00 |
21:14:43.53 |
-07:57:38.0 |
HIP 104898 |
14.67 |
| 2026-08-05 00:00 |
21:14:22.83 |
-07:58:22.5 |
HIP 104898 |
17.07 |
| 2026-08-05 12:00 |
21:14:02.09 |
-07:59:07.7 |
HIP 104898 |
20.54 |
| 2026-08-06 00:00 |
21:13:41.31 |
-07:59:53.6 |
HIP 104898 |
24.63 |
| 2026-08-06 12:00 |
21:13:20.49 |
-08:00:40.2 |
HIP 104641 |
23.22 |
| 2026-08-07 00:00 |
21:12:59.64 |
-08:01:27.5 |
HIP 104641 |
18.26 |
| 2026-08-07 12:00 |
21:12:38.75 |
-08:02:15.5 |
HIP 104641 |
13.49 |
| 2026-08-08 00:00 |
21:12:17.84 |
-08:03:04.1 |
HIP 104641 |
9.23 |
| 2026-08-08 12:00 |
21:11:56.91 |
-08:03:53.4 |
HIP 104641 |
6.59 |
| 2026-08-09 00:00 |
21:11:35.96 |
-08:04:43.2 |
HIP 104641 |
7.55 |
| 2026-08-09 12:00 |
21:11:14.99 |
-08:05:33.7 |
HIP 104641 |
11.22 |
| 2026-08-10 00:00 |
21:10:54.01 |
-08:06:24.8 |
HIP 104641 |
15.82 |
| 2026-08-10 12:00 |
21:10:33.02 |
-08:07:16.5 |
HIP 104641 |
20.75 |
| 2026-08-11 00:00 |
21:10:12.04 |
-08:08:08.7 |
HIP 104641 |
25.81 |
| 2026-08-11 12:00 |
21:09:51.05 |
-08:09:01.5 |
HIP 104641 |
30.95 |
| 2026-08-12 00:00 |
21:09:30.07 |
-08:09:54.8 |
HIP 104300 |
30.17 |
| 2026-08-12 12:00 |
21:09:09.10 |
-08:10:48.6 |
HIP 104300 |
25.36 |
| 2026-08-13 00:00 |
21:08:48.14 |
-08:11:42.9 |
HIP 104272 |
20.39 |
| 2026-08-13 12:00 |
21:08:27.20 |
-08:12:37.7 |
HIP 104272 |
15.14 |
| 2026-08-14 00:00 |
21:08:06.28 |
-08:13:33.0 |
HIP 104272 |
9.91 |
| 2026-08-14 12:00 |
21:07:45.39 |
-08:14:28.7 |
HIP 104272 |
4.74 |
| 2026-08-15 00:00 |
21:07:24.52 |
-08:15:24.9 |
HIP 104272 |
1.39 |
| 2026-08-15 12:00 |
21:07:03.69 |
-08:16:21.5 |
HIP 104272 |
6.03 |
| 2026-08-16 00:00 |
21:06:42.90 |
-08:17:18.5 |
HIP 104272 |
11.20 |
| 2026-08-16 12:00 |
21:06:22.16 |
-08:18:15.9 |
HIP 104122 |
11.76 |
| 2026-08-17 00:00 |
21:06:01.45 |
-08:19:13.6 |
HIP 104122 |
6.98 |
| 2026-08-17 12:00 |
21:05:40.80 |
-08:20:11.8 |
HIP 104122 |
3.64 |
| 2026-08-18 00:00 |
21:05:20.20 |
-08:21:10.2 |
HIP 104122 |
5.63 |
| 2026-08-18 12:00 |
21:04:59.66 |
-08:22:09.0 |
HIP 104122 |
10.18 |
| 2026-08-19 00:00 |
21:04:39.18 |
-08:23:08.1 |
HIP 104122 |
15.12 |