メタデータ
| 項目 |
値 |
| Designation |
C/2011 KP36 (Spacewatch) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-05-26T20:57:18.164160Z |
| Orbit solution date (soln_date, UTC) |
2023-05-10T17:42:22Z |
| Obs used |
3711 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
7.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-06-22.0000000 |
| e |
0.87286835 |
| q (au) |
4.883307 |
| a (au) |
38.411417 |
| i (deg) |
18.986783 |
| Ω (om, deg) |
173.400328 |
| ω (w, deg) |
180.594874 |
| M (ma, deg) |
0.108169 |
等級
散乱 + 全体線形
$$
M_a = (2.585 + 4.026\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.585 |
| n |
4.026 |
| gf |
0.978 |
| gb |
-0.729 |
| k |
1.000 |
| δ90 |
9.997 |
| 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 |
| 2012-07-24 |
2015-11-05 |
+6.8509 |
-5.054 |
| 2016-06-09 |
2017-09-25 |
-12.0140 |
+8.444 |
| 2017-09-25 |
2020-12-25 |
+1.9640 |
-1.986 |
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 |
08:00:54.84 |
+05:14:26.6 |
HIP 39268 |
13.41 |
| 2026-03-26 12:00 |
08:00:53.41 |
+05:14:55.4 |
HIP 39268 |
13.85 |
| 2026-03-27 00:00 |
08:00:52.03 |
+05:15:24.2 |
HIP 39268 |
14.29 |
| 2026-03-27 12:00 |
08:00:50.71 |
+05:15:52.8 |
HIP 39268 |
14.72 |
| 2026-03-28 00:00 |
08:00:49.43 |
+05:16:21.4 |
HIP 39268 |
15.16 |
| 2026-03-28 12:00 |
08:00:48.20 |
+05:16:49.8 |
HIP 39268 |
15.59 |
| 2026-03-29 00:00 |
08:00:47.02 |
+05:17:18.2 |
HIP 39268 |
16.02 |
| 2026-03-29 12:00 |
08:00:45.89 |
+05:17:46.5 |
HIP 39268 |
16.44 |
| 2026-03-30 00:00 |
08:00:44.80 |
+05:18:14.7 |
HIP 39268 |
16.86 |
| 2026-03-30 12:00 |
08:00:43.77 |
+05:18:42.7 |
HIP 39268 |
17.28 |
| 2026-03-31 00:00 |
08:00:42.79 |
+05:19:10.7 |
HIP 39268 |
17.69 |
| 2026-03-31 12:00 |
08:00:41.85 |
+05:19:38.5 |
HIP 39268 |
18.09 |
| 2026-04-01 00:00 |
08:00:40.97 |
+05:20:06.3 |
HIP 39268 |
18.48 |
| 2026-04-01 12:00 |
08:00:40.13 |
+05:20:33.9 |
HIP 39268 |
18.87 |
| 2026-04-02 00:00 |
08:00:39.34 |
+05:21:01.4 |
HIP 39268 |
19.26 |
| 2026-04-02 12:00 |
08:00:38.61 |
+05:21:28.9 |
HIP 39268 |
19.64 |
| 2026-04-03 00:00 |
08:00:37.92 |
+05:21:56.2 |
HIP 39268 |
20.01 |
| 2026-04-03 12:00 |
08:00:37.28 |
+05:22:23.3 |
HIP 39268 |
20.37 |
| 2026-04-04 00:00 |
08:00:36.69 |
+05:22:50.4 |
HIP 39268 |
20.73 |
| 2026-04-04 12:00 |
08:00:36.15 |
+05:23:17.3 |
HIP 39268 |
21.08 |
| 2026-04-05 00:00 |
08:00:35.66 |
+05:23:44.2 |
HIP 39268 |
21.42 |
| 2026-04-05 12:00 |
08:00:35.22 |
+05:24:10.8 |
HIP 39268 |
21.76 |
| 2026-04-06 00:00 |
08:00:34.83 |
+05:24:37.4 |
HIP 39268 |
22.09 |
| 2026-04-06 12:00 |
08:00:34.49 |
+05:25:03.9 |
HIP 39268 |
22.41 |
| 2026-04-07 00:00 |
08:00:34.20 |
+05:25:30.2 |
HIP 39268 |
22.73 |
| 2026-04-07 12:00 |
08:00:33.95 |
+05:25:56.3 |
HIP 39037 |
22.94 |
| 2026-04-08 00:00 |
08:00:33.76 |
+05:26:22.4 |
HIP 39037 |
23.10 |
| 2026-04-08 12:00 |
08:00:33.62 |
+05:26:48.3 |
HIP 39037 |
23.29 |
| 2026-04-09 00:00 |
08:00:33.52 |
+05:27:14.1 |
HIP 39037 |
23.49 |
| 2026-04-09 12:00 |
08:00:33.48 |
+05:27:39.7 |
HIP 39037 |
23.70 |
| 2026-04-10 00:00 |
08:00:33.49 |
+05:28:05.2 |
HIP 39037 |
23.93 |
| 2026-04-10 12:00 |
08:00:33.54 |
+05:28:30.6 |
HIP 39037 |
24.17 |
| 2026-04-11 00:00 |
08:00:33.65 |
+05:28:55.8 |
HIP 39037 |
24.43 |
| 2026-04-11 12:00 |
08:00:33.80 |
+05:29:20.8 |
HIP 39037 |
24.70 |
| 2026-04-12 00:00 |
08:00:34.01 |
+05:29:45.8 |
HIP 39037 |
24.98 |
| 2026-04-12 12:00 |
08:00:34.26 |
+05:30:10.5 |
HIP 39037 |
25.28 |
| 2026-04-13 00:00 |
08:00:34.57 |
+05:30:35.2 |
HIP 39037 |
25.59 |
| 2026-04-13 12:00 |
08:00:34.92 |
+05:30:59.6 |
HIP 39037 |
25.90 |
| 2026-04-14 00:00 |
08:00:35.32 |
+05:31:23.9 |
HIP 39037 |
26.23 |
| 2026-04-14 12:00 |
08:00:35.78 |
+05:31:48.1 |
HIP 39037 |
26.57 |
| 2026-04-15 00:00 |
08:00:36.28 |
+05:32:12.1 |
HIP 39268 |
26.88 |
| 2026-04-15 12:00 |
08:00:36.83 |
+05:32:35.9 |
HIP 39268 |
27.09 |
| 2026-04-16 00:00 |
08:00:37.43 |
+05:32:59.6 |
HIP 39268 |
27.29 |