メタデータ
| 項目 |
値 |
| Designation |
C/2007 M3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-09-04T15:02:43.900800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:10Z |
| Obs used |
680 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
8.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-08-18.0000000 |
| e |
0.97975971 |
| q (au) |
3.468759 |
| a (au) |
171.378889 |
| i (deg) |
161.760899 |
| Ω (om, deg) |
41.620749 |
| ω (w, deg) |
125.739479 |
| M (ma, deg) |
359.992256 |
等級
散乱 + 全体線形
$$
M_a = (5.660 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.660 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
| 2006-11-12 |
2007-09-03 |
+12.7086 |
-6.767 |
| 2007-09-06 |
2008-07-01 |
+1.6882 |
-1.461 |
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) |
| 2026-03-26 00:00 |
08:27:12.57 |
+00:03:39.4 |
HIP 41538 |
19.00 |
| 2026-03-26 12:00 |
08:27:10.68 |
+00:04:00.6 |
HIP 41345 |
18.68 |
| 2026-03-27 00:00 |
08:27:08.82 |
+00:04:21.8 |
HIP 41345 |
18.09 |
| 2026-03-27 12:00 |
08:27:06.98 |
+00:04:43.0 |
HIP 41345 |
17.52 |
| 2026-03-28 00:00 |
08:27:05.17 |
+00:05:04.1 |
HIP 41345 |
16.95 |
| 2026-03-28 12:00 |
08:27:03.38 |
+00:05:25.3 |
HIP 41345 |
16.38 |
| 2026-03-29 00:00 |
08:27:01.63 |
+00:05:46.3 |
HIP 41345 |
15.83 |
| 2026-03-29 12:00 |
08:26:59.89 |
+00:06:07.4 |
HIP 41345 |
15.28 |
| 2026-03-30 00:00 |
08:26:58.19 |
+00:06:28.4 |
HIP 41345 |
14.73 |
| 2026-03-30 12:00 |
08:26:56.51 |
+00:06:49.4 |
HIP 41345 |
14.19 |
| 2026-03-31 00:00 |
08:26:54.86 |
+00:07:10.3 |
HIP 41345 |
13.66 |
| 2026-03-31 12:00 |
08:26:53.23 |
+00:07:31.2 |
HIP 41345 |
13.14 |
| 2026-04-01 00:00 |
08:26:51.63 |
+00:07:52.0 |
HIP 41345 |
12.62 |
| 2026-04-01 12:00 |
08:26:50.06 |
+00:08:12.8 |
HIP 41345 |
12.11 |
| 2026-04-02 00:00 |
08:26:48.51 |
+00:08:33.6 |
HIP 41345 |
11.61 |
| 2026-04-02 12:00 |
08:26:46.99 |
+00:08:54.3 |
HIP 41345 |
11.12 |
| 2026-04-03 00:00 |
08:26:45.50 |
+00:09:14.9 |
HIP 41345 |
10.63 |
| 2026-04-03 12:00 |
08:26:44.04 |
+00:09:35.5 |
HIP 41345 |
10.15 |
| 2026-04-04 00:00 |
08:26:42.60 |
+00:09:56.1 |
HIP 41345 |
9.69 |
| 2026-04-04 12:00 |
08:26:41.19 |
+00:10:16.6 |
HIP 41345 |
9.23 |
| 2026-04-05 00:00 |
08:26:39.81 |
+00:10:37.1 |
HIP 41345 |
8.78 |
| 2026-04-05 12:00 |
08:26:38.45 |
+00:10:57.5 |
HIP 41345 |
8.34 |
| 2026-04-06 00:00 |
08:26:37.12 |
+00:11:17.8 |
HIP 41345 |
7.92 |
| 2026-04-06 12:00 |
08:26:35.82 |
+00:11:38.1 |
HIP 41345 |
7.51 |
| 2026-04-07 00:00 |
08:26:34.54 |
+00:11:58.3 |
HIP 41345 |
7.11 |
| 2026-04-07 12:00 |
08:26:33.30 |
+00:12:18.5 |
HIP 41345 |
6.72 |
| 2026-04-08 00:00 |
08:26:32.08 |
+00:12:38.6 |
HIP 41345 |
6.36 |
| 2026-04-08 12:00 |
08:26:30.89 |
+00:12:58.6 |
HIP 41345 |
6.01 |
| 2026-04-09 00:00 |
08:26:29.72 |
+00:13:18.6 |
HIP 41345 |
5.68 |
| 2026-04-09 12:00 |
08:26:28.59 |
+00:13:38.5 |
HIP 41345 |
5.38 |
| 2026-04-10 00:00 |
08:26:27.48 |
+00:13:58.3 |
HIP 41345 |
5.10 |
| 2026-04-10 12:00 |
08:26:26.40 |
+00:14:18.1 |
HIP 41345 |
4.85 |
| 2026-04-11 00:00 |
08:26:25.34 |
+00:14:37.8 |
HIP 41345 |
4.64 |
| 2026-04-11 12:00 |
08:26:24.32 |
+00:14:57.4 |
HIP 41345 |
4.46 |
| 2026-04-12 00:00 |
08:26:23.32 |
+00:15:17.0 |
HIP 41345 |
4.32 |
| 2026-04-12 12:00 |
08:26:22.35 |
+00:15:36.5 |
HIP 41345 |
4.22 |
| 2026-04-13 00:00 |
08:26:21.41 |
+00:15:55.9 |
HIP 41345 |
4.16 |
| 2026-04-13 12:00 |
08:26:20.50 |
+00:16:15.2 |
HIP 41345 |
4.15 |
| 2026-04-14 00:00 |
08:26:19.61 |
+00:16:34.5 |
HIP 41345 |
4.18 |
| 2026-04-14 12:00 |
08:26:18.75 |
+00:16:53.6 |
HIP 41345 |
4.25 |
| 2026-04-15 00:00 |
08:26:17.92 |
+00:17:12.7 |
HIP 41345 |
4.35 |
| 2026-04-15 12:00 |
08:26:17.12 |
+00:17:31.7 |
HIP 41345 |
4.49 |
| 2026-04-16 00:00 |
08:26:16.35 |
+00:17:50.6 |
HIP 41345 |
4.66 |