C/1999 H3 (LINEAR)
メタデータ
| 項目 |
値 |
| Designation |
C/1999 H3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-08-18T05:16:31.920960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:59Z |
| Obs used |
847 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-02-08.0000000 |
| e |
1.00296415 |
| q (au) |
3.500834 |
| a (au) |
-1181.056590 |
| i (deg) |
115.837319 |
| Ω (om, deg) |
332.729392 |
| ω (w, deg) |
101.910427 |
| M (ma, deg) |
0.004220 |
等級
散乱 + 全体線形
$$
M_a = (5.669 + 4.197\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.669 |
| n |
4.197 |
| gf |
0.894 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
06:28:38.54 |
-35:28:37.5 |
HIP 30834 |
12.90 |
| 2026-02-03 12:00 |
06:28:35.85 |
-35:28:17.6 |
HIP 30834 |
12.56 |
| 2026-02-04 00:00 |
06:28:33.18 |
-35:27:57.5 |
HIP 30834 |
12.25 |
| 2026-02-04 12:00 |
06:28:30.53 |
-35:27:37.2 |
HIP 30834 |
11.95 |
| 2026-02-05 00:00 |
06:28:27.90 |
-35:27:16.7 |
HIP 30834 |
11.68 |
| 2026-02-05 12:00 |
06:28:25.28 |
-35:26:56.0 |
HIP 30834 |
11.43 |
| 2026-02-06 00:00 |
06:28:22.69 |
-35:26:35.0 |
HIP 30834 |
11.21 |
| 2026-02-06 12:00 |
06:28:20.11 |
-35:26:13.8 |
HIP 30834 |
11.01 |
| 2026-02-07 00:00 |
06:28:17.55 |
-35:25:52.4 |
HIP 30834 |
10.85 |
| 2026-02-07 12:00 |
06:28:15.01 |
-35:25:30.8 |
HIP 30834 |
10.71 |
| 2026-02-08 00:00 |
06:28:12.49 |
-35:25:09.0 |
HIP 30834 |
10.61 |
| 2026-02-08 12:00 |
06:28:09.99 |
-35:24:47.0 |
HIP 30834 |
10.53 |
| 2026-02-09 00:00 |
06:28:07.51 |
-35:24:24.8 |
HIP 30834 |
10.49 |
| 2026-02-09 12:00 |
06:28:05.05 |
-35:24:02.3 |
HIP 30834 |
10.48 |
| 2026-02-10 00:00 |
06:28:02.60 |
-35:23:39.7 |
HIP 30834 |
10.51 |
| 2026-02-10 12:00 |
06:28:00.18 |
-35:23:16.9 |
HIP 30834 |
10.56 |
| 2026-02-11 00:00 |
06:27:57.78 |
-35:22:53.8 |
HIP 30834 |
10.65 |
| 2026-02-11 12:00 |
06:27:55.40 |
-35:22:30.6 |
HIP 30834 |
10.77 |
| 2026-02-12 00:00 |
06:27:53.04 |
-35:22:07.2 |
HIP 30834 |
10.91 |
| 2026-02-12 12:00 |
06:27:50.70 |
-35:21:43.6 |
HIP 30834 |
11.08 |
| 2026-02-13 00:00 |
06:27:48.38 |
-35:21:19.8 |
HIP 30834 |
11.28 |
| 2026-02-13 12:00 |
06:27:46.08 |
-35:20:55.8 |
HIP 30834 |
11.51 |
| 2026-02-14 00:00 |
06:27:43.81 |
-35:20:31.6 |
HIP 30834 |
11.75 |
| 2026-02-14 12:00 |
06:27:41.55 |
-35:20:07.2 |
HIP 30834 |
12.02 |
| 2026-02-15 00:00 |
06:27:39.32 |
-35:19:42.7 |
HIP 30834 |
12.31 |
| 2026-02-15 12:00 |
06:27:37.11 |
-35:19:18.0 |
HIP 30834 |
12.61 |
| 2026-02-16 00:00 |
06:27:34.92 |
-35:18:53.1 |
HIP 30834 |
12.94 |
| 2026-02-16 12:00 |
06:27:32.76 |
-35:18:28.0 |
HIP 30834 |
13.27 |
| 2026-02-17 00:00 |
06:27:30.61 |
-35:18:02.8 |
HIP 30834 |
13.62 |
| 2026-02-17 12:00 |
06:27:28.49 |
-35:17:37.3 |
HIP 30834 |
13.99 |
| 2026-02-18 00:00 |
06:27:26.39 |
-35:17:11.8 |
HIP 30834 |
14.36 |
| 2026-02-18 12:00 |
06:27:24.31 |
-35:16:46.0 |
HIP 30834 |
14.75 |
| 2026-02-19 00:00 |
06:27:22.26 |
-35:16:20.1 |
HIP 30834 |
15.15 |
| 2026-02-19 12:00 |
06:27:20.23 |
-35:15:54.0 |
HIP 30834 |
15.55 |
| 2026-02-20 00:00 |
06:27:18.22 |
-35:15:27.8 |
HIP 30834 |
15.96 |
| 2026-02-20 12:00 |
06:27:16.24 |
-35:15:01.4 |
HIP 30834 |
16.38 |
| 2026-02-21 00:00 |
06:27:14.28 |
-35:14:34.9 |
HIP 30604 |
16.65 |
| 2026-02-21 12:00 |
06:27:12.34 |
-35:14:08.2 |
HIP 30604 |
16.44 |
| 2026-02-22 00:00 |
06:27:10.43 |
-35:13:41.4 |
HIP 30604 |
16.25 |
| 2026-02-22 12:00 |
06:27:08.54 |
-35:13:14.4 |
HIP 30604 |
16.09 |
| 2026-02-23 00:00 |
06:27:06.68 |
-35:12:47.3 |
HIP 30604 |
15.95 |
| 2026-02-23 12:00 |
06:27:04.84 |
-35:12:20.0 |
HIP 30604 |
15.85 |
| 2026-02-24 00:00 |
06:27:03.02 |
-35:11:52.6 |
HIP 30604 |
15.76 |