メタデータ
| 項目 |
値 |
| Designation |
C/2002 O7 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-09-22T13:43:12.020160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:18Z |
| Obs used |
1606 |
| NEO |
- |
| M1 |
12.100 |
| 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) |
2003-04-07.0000000 |
| e |
1.00027490 |
| q (au) |
0.903322 |
| a (au) |
-3285.990387 |
| i (deg) |
98.743371 |
| Ω (om, deg) |
12.803602 |
| ω (w, deg) |
252.068643 |
| M (ma, deg) |
-0.000882 |
等級
散乱 + 全体線形
$$
M_a = (11.219 + 3.450\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.219 |
| n |
3.450 |
| gf |
1.000 |
| gb |
-0.894 |
| k |
0.959 |
| 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 |
| 2002-07-29 |
2003-07-27 |
+1.7590 |
-1.083 |
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) |
| 2026-09-20 00:00 |
22:00:17.71 |
+49:29:01.5 |
HIP 108577 |
22.41 |
| 2026-09-20 12:00 |
22:00:14.28 |
+49:28:38.8 |
HIP 108577 |
21.90 |
| 2026-09-21 00:00 |
22:00:10.86 |
+49:28:15.8 |
HIP 108577 |
21.40 |
| 2026-09-21 12:00 |
22:00:07.46 |
+49:27:52.7 |
HIP 108577 |
20.91 |
| 2026-09-22 00:00 |
22:00:04.08 |
+49:27:29.3 |
HIP 108577 |
20.42 |
| 2026-09-22 12:00 |
22:00:00.72 |
+49:27:05.6 |
HIP 108577 |
19.94 |
| 2026-09-23 00:00 |
21:59:57.37 |
+49:26:41.7 |
HIP 108577 |
19.47 |
| 2026-09-23 12:00 |
21:59:54.05 |
+49:26:17.6 |
HIP 108577 |
19.01 |
| 2026-09-24 00:00 |
21:59:50.74 |
+49:25:53.3 |
HIP 108577 |
18.55 |
| 2026-09-24 12:00 |
21:59:47.45 |
+49:25:28.7 |
HIP 108577 |
18.11 |
| 2026-09-25 00:00 |
21:59:44.18 |
+49:25:04.0 |
HIP 108577 |
17.68 |
| 2026-09-25 12:00 |
21:59:40.93 |
+49:24:39.0 |
HIP 108577 |
17.26 |
| 2026-09-26 00:00 |
21:59:37.70 |
+49:24:13.7 |
HIP 108577 |
16.85 |
| 2026-09-26 12:00 |
21:59:34.49 |
+49:23:48.3 |
HIP 108577 |
16.46 |
| 2026-09-27 00:00 |
21:59:31.31 |
+49:23:22.6 |
HIP 108577 |
16.08 |
| 2026-09-27 12:00 |
21:59:28.14 |
+49:22:56.8 |
HIP 108577 |
15.72 |
| 2026-09-28 00:00 |
21:59:24.99 |
+49:22:30.7 |
HIP 108577 |
15.37 |
| 2026-09-28 12:00 |
21:59:21.86 |
+49:22:04.4 |
HIP 108577 |
15.04 |
| 2026-09-29 00:00 |
21:59:18.76 |
+49:21:37.9 |
HIP 108577 |
14.73 |
| 2026-09-29 12:00 |
21:59:15.67 |
+49:21:11.2 |
HIP 108577 |
14.44 |
| 2026-09-30 00:00 |
21:59:12.61 |
+49:20:44.2 |
HIP 108577 |
14.18 |
| 2026-09-30 12:00 |
21:59:09.57 |
+49:20:17.1 |
HIP 108577 |
13.93 |
| 2026-10-01 00:00 |
21:59:06.55 |
+49:19:49.8 |
HIP 108577 |
13.71 |
| 2026-10-01 12:00 |
21:59:03.56 |
+49:19:22.3 |
HIP 108577 |
13.52 |
| 2026-10-02 00:00 |
21:59:00.58 |
+49:18:54.5 |
HIP 108577 |
13.35 |
| 2026-10-02 12:00 |
21:58:57.63 |
+49:18:26.6 |
HIP 108577 |
13.21 |
| 2026-10-03 00:00 |
21:58:54.71 |
+49:17:58.5 |
HIP 108577 |
13.09 |
| 2026-10-03 12:00 |
21:58:51.80 |
+49:17:30.2 |
HIP 108577 |
13.01 |
| 2026-10-04 00:00 |
21:58:48.92 |
+49:17:01.7 |
HIP 108577 |
12.95 |
| 2026-10-04 12:00 |
21:58:46.06 |
+49:16:33.1 |
HIP 108577 |
12.93 |
| 2026-10-05 00:00 |
21:58:43.23 |
+49:16:04.2 |
HIP 108577 |
12.93 |
| 2026-10-05 12:00 |
21:58:40.42 |
+49:15:35.2 |
HIP 108577 |
12.96 |
| 2026-10-06 00:00 |
21:58:37.64 |
+49:15:05.9 |
HIP 108433 |
13.01 |
| 2026-10-06 12:00 |
21:58:34.88 |
+49:14:36.6 |
HIP 108433 |
12.36 |
| 2026-10-07 00:00 |
21:58:32.14 |
+49:14:07.0 |
HIP 108433 |
11.71 |
| 2026-10-07 12:00 |
21:58:29.43 |
+49:13:37.2 |
HIP 108433 |
11.06 |
| 2026-10-08 00:00 |
21:58:26.75 |
+49:13:07.3 |
HIP 108433 |
10.40 |
| 2026-10-08 12:00 |
21:58:24.09 |
+49:12:37.2 |
HIP 108433 |
9.75 |
| 2026-10-09 00:00 |
21:58:21.45 |
+49:12:07.0 |
HIP 108433 |
9.11 |
| 2026-10-09 12:00 |
21:58:18.85 |
+49:11:36.6 |
HIP 108433 |
8.46 |
| 2026-10-10 00:00 |
21:58:16.27 |
+49:11:06.0 |
HIP 108433 |
7.82 |
| 2026-10-10 12:00 |
21:58:13.71 |
+49:10:35.3 |
HIP 108433 |
7.17 |
| 2026-10-11 00:00 |
21:58:11.18 |
+49:10:04.4 |
HIP 108433 |
6.54 |