메타데이터
| 항목 |
값 |
| Designation |
66P/du Toit |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-20T11:15:17.081280Z |
| Orbit solution date (soln_date, UTC) |
2019-06-03T14:53:20Z |
| Obs used |
547 |
| NEO |
Yes |
| M1 |
15.700 |
| K1 |
7.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-10-31.0000000 |
| e |
0.78656817 |
| q (au) |
1.285451 |
| a (au) |
6.022773 |
| i (deg) |
18.668971 |
| Ω (om, deg) |
21.999851 |
| ω (w, deg) |
257.342734 |
| M (ma, deg) |
273.482032 |
밝기
산란 + 전체 선형
$$
M_a = (13.128 + 5.614\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.128 |
| n |
5.614 |
| gf |
0.972 |
| gb |
-0.780 |
| k |
0.995 |
| δ90 |
9.986 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2018-01-14 |
2018-05-20 |
+20.2694 |
-4.971 |
| 2018-05-21 |
2018-10-04 |
+19.3493 |
-5.821 |
| 2018-10-04 |
2018-11-10 |
-27.9513 |
+9.461 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:43:28.13 |
+40:06:15.0 |
HIP 32211 |
8.63 |
| 2026-06-01 12:00 |
06:43:41.29 |
+40:05:43.3 |
HIP 32211 |
8.67 |
| 2026-06-02 00:00 |
06:43:54.50 |
+40:05:11.9 |
HIP 32211 |
9.45 |
| 2026-06-02 12:00 |
06:44:07.75 |
+40:04:40.6 |
HIP 32211 |
10.82 |
| 2026-06-03 00:00 |
06:44:21.04 |
+40:04:09.5 |
HIP 32211 |
12.59 |
| 2026-06-03 12:00 |
06:44:34.38 |
+40:03:38.7 |
HIP 32211 |
14.61 |
| 2026-06-04 00:00 |
06:44:47.75 |
+40:03:08.0 |
HIP 32211 |
16.81 |
| 2026-06-04 12:00 |
06:45:01.16 |
+40:02:37.6 |
HIP 32211 |
19.12 |
| 2026-06-05 00:00 |
06:45:14.61 |
+40:02:07.3 |
HIP 32486 |
21.43 |
| 2026-06-05 12:00 |
06:45:28.10 |
+40:01:37.3 |
HIP 32486 |
19.68 |
| 2026-06-06 00:00 |
06:45:41.63 |
+40:01:07.5 |
HIP 32486 |
18.14 |
| 2026-06-06 12:00 |
06:45:55.20 |
+40:00:37.9 |
HIP 32486 |
16.86 |
| 2026-06-07 00:00 |
06:46:08.80 |
+40:00:08.5 |
HIP 32486 |
15.91 |
| 2026-06-07 12:00 |
06:46:22.44 |
+39:59:39.3 |
HIP 32486 |
15.37 |
| 2026-06-08 00:00 |
06:46:36.11 |
+39:59:10.3 |
HIP 32486 |
15.26 |
| 2026-06-08 12:00 |
06:46:49.82 |
+39:58:41.5 |
HIP 32486 |
15.61 |
| 2026-06-09 00:00 |
06:47:03.56 |
+39:58:13.0 |
HIP 32486 |
16.39 |
| 2026-06-09 12:00 |
06:47:17.34 |
+39:57:44.6 |
HIP 32486 |
17.55 |
| 2026-06-10 00:00 |
06:47:31.15 |
+39:57:16.5 |
HIP 32486 |
19.01 |
| 2026-06-10 12:00 |
06:47:45.00 |
+39:56:48.6 |
HIP 32486 |
20.72 |
| 2026-06-11 00:00 |
06:47:58.87 |
+39:56:20.9 |
HIP 32486 |
22.62 |
| 2026-06-11 12:00 |
06:48:12.78 |
+39:55:53.4 |
HIP 32719 |
21.35 |
| 2026-06-12 00:00 |
06:48:26.71 |
+39:55:26.1 |
HIP 32719 |
19.84 |
| 2026-06-12 12:00 |
06:48:40.68 |
+39:54:59.1 |
HIP 32792 |
17.62 |
| 2026-06-13 00:00 |
06:48:54.68 |
+39:54:32.2 |
HIP 32792 |
15.03 |
| 2026-06-13 12:00 |
06:49:08.70 |
+39:54:05.6 |
HIP 32792 |
12.50 |
| 2026-06-14 00:00 |
06:49:22.75 |
+39:53:39.2 |
HIP 32792 |
10.06 |
| 2026-06-14 12:00 |
06:49:36.83 |
+39:53:13.0 |
HIP 32792 |
7.80 |
| 2026-06-15 00:00 |
06:49:50.94 |
+39:52:47.1 |
HIP 32792 |
5.96 |
| 2026-06-15 12:00 |
06:50:05.07 |
+39:52:21.3 |
HIP 32792 |
5.01 |
| 2026-06-16 00:00 |
06:50:19.23 |
+39:51:55.8 |
HIP 32792 |
5.44 |
| 2026-06-16 12:00 |
06:50:33.41 |
+39:51:30.5 |
HIP 32792 |
7.02 |
| 2026-06-17 00:00 |
06:50:47.62 |
+39:51:05.5 |
HIP 32808 |
9.11 |
| 2026-06-17 12:00 |
06:51:01.85 |
+39:50:40.6 |
HIP 32808 |
10.57 |
| 2026-06-18 00:00 |
06:51:16.10 |
+39:50:16.0 |
HIP 32808 |
12.49 |
| 2026-06-18 12:00 |
06:51:30.37 |
+39:49:51.6 |
HIP 33002 |
13.95 |
| 2026-06-19 00:00 |
06:51:44.67 |
+39:49:27.5 |
HIP 33002 |
11.73 |
| 2026-06-19 12:00 |
06:51:58.98 |
+39:49:03.5 |
HIP 33002 |
9.79 |
| 2026-06-20 00:00 |
06:52:13.31 |
+39:48:39.8 |
HIP 33002 |
8.34 |
| 2026-06-20 12:00 |
06:52:27.66 |
+39:48:16.3 |
HIP 33002 |
7.65 |
| 2026-06-21 00:00 |
06:52:42.03 |
+39:47:53.1 |
HIP 33002 |
7.93 |
| 2026-06-21 12:00 |
06:52:56.42 |
+39:47:30.0 |
HIP 33103 |
8.73 |
| 2026-06-22 00:00 |
06:53:10.83 |
+39:47:07.3 |
HIP 33103 |
5.94 |