111P/Helin-Roman-Crockett
メタデータ
| 項目 |
値 |
| Designation |
111P/Helin-Roman-Crockett |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-30T15:06:06.327360Z |
| Orbit solution date (soln_date, UTC) |
2013-01-28T09:17:54Z |
| Obs used |
137 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
17.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-01-28.0000000 |
| e |
0.10962077 |
| q (au) |
3.704303 |
| a (au) |
4.160366 |
| i (deg) |
4.228807 |
| Ω (om, deg) |
89.793998 |
| ω (w, deg) |
3.377942 |
| M (ma, deg) |
359.694623 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:26:19.16 |
-22:53:21.8 |
HIP 95457 |
19.13 |
| 2026-02-03 12:00 |
19:26:51.11 |
-22:52:28.6 |
HIP 95709 |
16.58 |
| 2026-02-04 00:00 |
19:27:23.00 |
-22:51:35.1 |
HIP 95709 |
9.28 |
| 2026-02-04 12:00 |
19:27:54.85 |
-22:50:41.4 |
HIP 95709 |
2.60 |
| 2026-02-05 00:00 |
19:28:26.64 |
-22:49:47.4 |
HIP 95709 |
6.05 |
| 2026-02-05 12:00 |
19:28:58.38 |
-22:48:53.3 |
HIP 95709 |
13.23 |
| 2026-02-06 00:00 |
19:29:30.06 |
-22:47:58.8 |
HIP 95709 |
20.53 |
| 2026-02-06 12:00 |
19:30:01.69 |
-22:47:04.2 |
HIP 95709 |
27.85 |
| 2026-02-07 00:00 |
19:30:33.27 |
-22:46:09.3 |
HIP 96107 |
25.74 |
| 2026-02-07 12:00 |
19:31:04.79 |
-22:45:14.2 |
HIP 96107 |
18.43 |
| 2026-02-08 00:00 |
19:31:36.25 |
-22:44:18.9 |
HIP 96107 |
11.16 |
| 2026-02-08 12:00 |
19:32:07.65 |
-22:43:23.3 |
HIP 96107 |
4.06 |
| 2026-02-09 00:00 |
19:32:38.99 |
-22:42:27.6 |
HIP 96107 |
3.85 |
| 2026-02-09 12:00 |
19:33:10.28 |
-22:41:31.6 |
HIP 96107 |
10.92 |
| 2026-02-10 00:00 |
19:33:41.50 |
-22:40:35.5 |
HIP 96107 |
18.14 |
| 2026-02-10 12:00 |
19:34:12.67 |
-22:39:39.1 |
HIP 96240 |
21.36 |
| 2026-02-11 00:00 |
19:34:43.77 |
-22:38:42.6 |
HIP 96240 |
23.62 |
| 2026-02-11 12:00 |
19:35:14.81 |
-22:37:45.8 |
HIP 96240 |
27.64 |
| 2026-02-12 00:00 |
19:35:45.78 |
-22:36:48.9 |
HIP 96474 |
25.34 |
| 2026-02-12 12:00 |
19:36:16.70 |
-22:35:51.8 |
HIP 96474 |
21.12 |
| 2026-02-13 00:00 |
19:36:47.54 |
-22:34:54.6 |
HIP 96474 |
18.81 |
| 2026-02-13 12:00 |
19:37:18.32 |
-22:33:57.1 |
HIP 96474 |
19.09 |
| 2026-02-14 00:00 |
19:37:49.03 |
-22:32:59.5 |
HIP 96474 |
21.86 |
| 2026-02-14 12:00 |
19:38:19.68 |
-22:32:01.7 |
HIP 96474 |
26.33 |
| 2026-02-15 00:00 |
19:38:50.26 |
-22:31:03.8 |
HIP 96785 |
24.99 |
| 2026-02-15 12:00 |
19:39:20.76 |
-22:30:05.7 |
HIP 96785 |
19.89 |
| 2026-02-16 00:00 |
19:39:51.20 |
-22:29:07.5 |
HIP 96785 |
16.38 |
| 2026-02-16 12:00 |
19:40:21.57 |
-22:28:09.2 |
HIP 96785 |
15.54 |
| 2026-02-17 00:00 |
19:40:51.86 |
-22:27:10.7 |
HIP 96913 |
16.51 |
| 2026-02-17 12:00 |
19:41:22.08 |
-22:26:12.0 |
HIP 96913 |
9.55 |
| 2026-02-18 00:00 |
19:41:52.23 |
-22:25:13.3 |
HIP 96913 |
3.08 |
| 2026-02-18 12:00 |
19:42:22.30 |
-22:24:14.4 |
HIP 96913 |
5.15 |
| 2026-02-19 00:00 |
19:42:52.29 |
-22:23:15.4 |
HIP 96913 |
11.91 |
| 2026-02-19 12:00 |
19:43:22.21 |
-22:22:16.4 |
HIP 96913 |
18.83 |
| 2026-02-20 00:00 |
19:43:52.05 |
-22:21:17.2 |
HIP 96913 |
25.76 |
| 2026-02-20 12:00 |
19:44:21.82 |
-22:20:17.9 |
HIP 97251 |
26.88 |
| 2026-02-21 00:00 |
19:44:51.50 |
-22:19:18.5 |
HIP 97251 |
21.02 |
| 2026-02-21 12:00 |
19:45:21.11 |
-22:18:19.0 |
HIP 97251 |
16.06 |
| 2026-02-22 00:00 |
19:45:50.63 |
-22:17:19.5 |
HIP 97251 |
13.03 |
| 2026-02-22 12:00 |
19:46:20.08 |
-22:16:19.8 |
HIP 97251 |
13.31 |
| 2026-02-23 00:00 |
19:46:49.44 |
-22:15:20.1 |
HIP 97251 |
16.69 |
| 2026-02-23 12:00 |
19:47:18.71 |
-22:14:20.4 |
HIP 97251 |
21.77 |
| 2026-02-24 00:00 |
19:47:47.91 |
-22:13:20.6 |
HIP 97383 |
24.01 |