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) |
| 2026-05-12 00:00 |
22:11:32.19 |
+48:34:57.3 |
HIP 109514 |
7.27 |
| 2026-05-12 12:00 |
22:11:32.75 |
+48:35:32.8 |
HIP 109514 |
6.88 |
| 2026-05-13 00:00 |
22:11:33.28 |
+48:36:08.3 |
HIP 109514 |
6.51 |
| 2026-05-13 12:00 |
22:11:33.78 |
+48:36:43.9 |
HIP 109514 |
6.18 |
| 2026-05-14 00:00 |
22:11:34.24 |
+48:37:19.4 |
HIP 109514 |
5.89 |
| 2026-05-14 12:00 |
22:11:34.68 |
+48:37:54.9 |
HIP 109514 |
5.64 |
| 2026-05-15 00:00 |
22:11:35.08 |
+48:38:30.4 |
HIP 109514 |
5.44 |
| 2026-05-15 12:00 |
22:11:35.46 |
+48:39:05.8 |
HIP 109514 |
5.29 |
| 2026-05-16 00:00 |
22:11:35.80 |
+48:39:41.3 |
HIP 109514 |
5.21 |
| 2026-05-16 12:00 |
22:11:36.11 |
+48:40:16.7 |
HIP 109514 |
5.18 |
| 2026-05-17 00:00 |
22:11:36.39 |
+48:40:52.1 |
HIP 109514 |
5.22 |
| 2026-05-17 12:00 |
22:11:36.63 |
+48:41:27.4 |
HIP 109514 |
5.32 |
| 2026-05-18 00:00 |
22:11:36.85 |
+48:42:02.7 |
HIP 109514 |
5.47 |
| 2026-05-18 12:00 |
22:11:37.03 |
+48:42:38.0 |
HIP 109514 |
5.68 |
| 2026-05-19 00:00 |
22:11:37.18 |
+48:43:13.3 |
HIP 109514 |
5.93 |
| 2026-05-19 12:00 |
22:11:37.30 |
+48:43:48.5 |
HIP 109514 |
6.23 |
| 2026-05-20 00:00 |
22:11:37.39 |
+48:44:23.7 |
HIP 109514 |
6.56 |
| 2026-05-20 12:00 |
22:11:37.45 |
+48:44:58.8 |
HIP 109514 |
6.91 |
| 2026-05-21 00:00 |
22:11:37.47 |
+48:45:33.8 |
HIP 109514 |
7.30 |
| 2026-05-21 12:00 |
22:11:37.47 |
+48:46:08.9 |
HIP 109514 |
7.70 |
| 2026-05-22 00:00 |
22:11:37.43 |
+48:46:43.8 |
HIP 109514 |
8.12 |
| 2026-05-22 12:00 |
22:11:37.36 |
+48:47:18.7 |
HIP 109514 |
8.56 |
| 2026-05-23 00:00 |
22:11:37.25 |
+48:47:53.6 |
HIP 109514 |
9.01 |
| 2026-05-23 12:00 |
22:11:37.12 |
+48:48:28.4 |
HIP 109514 |
9.47 |
| 2026-05-24 00:00 |
22:11:36.95 |
+48:49:03.1 |
HIP 109514 |
9.94 |
| 2026-05-24 12:00 |
22:11:36.76 |
+48:49:37.8 |
HIP 109514 |
10.42 |
| 2026-05-25 00:00 |
22:11:36.53 |
+48:50:12.4 |
HIP 109514 |
10.90 |
| 2026-05-25 12:00 |
22:11:36.27 |
+48:50:46.9 |
HIP 109514 |
11.39 |
| 2026-05-26 00:00 |
22:11:35.97 |
+48:51:21.3 |
HIP 109514 |
11.88 |
| 2026-05-26 12:00 |
22:11:35.65 |
+48:51:55.7 |
HIP 109514 |
12.38 |
| 2026-05-27 00:00 |
22:11:35.29 |
+48:52:30.0 |
HIP 109503 |
11.91 |
| 2026-05-27 12:00 |
22:11:34.91 |
+48:53:04.2 |
HIP 109503 |
11.39 |
| 2026-05-28 00:00 |
22:11:34.49 |
+48:53:38.4 |
HIP 109503 |
10.87 |
| 2026-05-28 12:00 |
22:11:34.04 |
+48:54:12.4 |
HIP 109503 |
10.35 |
| 2026-05-29 00:00 |
22:11:33.55 |
+48:54:46.4 |
HIP 109503 |
9.83 |
| 2026-05-29 12:00 |
22:11:33.04 |
+48:55:20.3 |
HIP 109503 |
9.32 |
| 2026-05-30 00:00 |
22:11:32.50 |
+48:55:54.1 |
HIP 109503 |
8.82 |
| 2026-05-30 12:00 |
22:11:31.92 |
+48:56:27.8 |
HIP 109503 |
8.32 |
| 2026-05-31 00:00 |
22:11:31.31 |
+48:57:01.4 |
HIP 109503 |
7.83 |
| 2026-05-31 12:00 |
22:11:30.67 |
+48:57:34.9 |
HIP 109503 |
7.35 |
| 2026-06-01 00:00 |
22:11:30.00 |
+48:58:08.3 |
HIP 109503 |
6.88 |
| 2026-06-01 12:00 |
22:11:29.29 |
+48:58:41.7 |
HIP 109503 |
6.43 |
| 2026-06-02 00:00 |
22:11:28.56 |
+48:59:14.9 |
HIP 109503 |
5.98 |