메타데이터
| 항목 |
값 |
| Designation |
96P/Machholz 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-10-27T23:03:31.547520Z |
| Orbit solution date (soln_date, UTC) |
2025-02-20T21:30:21Z |
| Obs used |
669 |
| NEO |
Yes |
| M1 |
13.700 |
| K1 |
8.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-07-27.0000000 |
| e |
0.95916084 |
| q (au) |
0.123950 |
| a (au) |
3.035069 |
| i (deg) |
58.137900 |
| Ω (om, deg) |
94.254723 |
| ω (w, deg) |
14.792845 |
| M (ma, deg) |
342.671895 |
밝기
산란 + 전체 선형
$$
M_a = (13.089 + 4.780\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.089 |
| n |
4.780 |
| gf |
0.800 |
| gb |
-0.781 |
| k |
0.948 |
| δ90 |
1.000 |
| 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 |
| 2022-05-06 |
2023-01-31 |
-13.7766 |
-12.187 |
| 2023-01-31 |
2023-02-15 |
+1.6478 |
+0.513 |
| 2023-02-15 |
2024-07-14 |
-0.2364 |
-0.358 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
18:49:35.87 |
-42:11:31.0 |
HIP 92425 |
6.14 |
| 2026-07-29 12:00 |
18:49:06.78 |
-42:11:35.9 |
HIP 92264 |
10.77 |
| 2026-07-30 00:00 |
18:48:37.84 |
-42:11:39.3 |
HIP 92264 |
6.09 |
| 2026-07-30 12:00 |
18:48:09.05 |
-42:11:41.2 |
HIP 92264 |
3.97 |
| 2026-07-31 00:00 |
18:47:40.41 |
-42:11:41.6 |
HIP 92264 |
7.15 |
| 2026-07-31 12:00 |
18:47:11.93 |
-42:11:40.5 |
HIP 92264 |
11.93 |
| 2026-08-01 00:00 |
18:46:43.60 |
-42:11:38.0 |
HIP 92110 |
16.47 |
| 2026-08-01 12:00 |
18:46:15.44 |
-42:11:34.0 |
HIP 92046 |
15.32 |
| 2026-08-02 00:00 |
18:45:47.45 |
-42:11:28.6 |
HIP 92046 |
14.10 |
| 2026-08-02 12:00 |
18:45:19.62 |
-42:11:21.7 |
HIP 92046 |
14.73 |
| 2026-08-03 00:00 |
18:44:51.97 |
-42:11:13.4 |
HIP 92046 |
16.98 |
| 2026-08-03 12:00 |
18:44:24.49 |
-42:11:03.7 |
HIP 92029 |
19.95 |
| 2026-08-04 00:00 |
18:43:57.19 |
-42:10:52.7 |
HIP 92029 |
23.21 |
| 2026-08-04 12:00 |
18:43:30.08 |
-42:10:40.2 |
HIP 91715 |
21.96 |
| 2026-08-05 00:00 |
18:43:03.15 |
-42:10:26.4 |
HIP 91715 |
18.76 |
| 2026-08-05 12:00 |
18:42:36.41 |
-42:10:11.2 |
HIP 91629 |
15.43 |
| 2026-08-06 00:00 |
18:42:09.86 |
-42:09:54.6 |
HIP 91629 |
10.51 |
| 2026-08-06 12:00 |
18:41:43.50 |
-42:09:36.8 |
HIP 91629 |
5.64 |
| 2026-08-07 00:00 |
18:41:17.35 |
-42:09:17.6 |
HIP 91629 |
1.05 |
| 2026-08-07 12:00 |
18:40:51.39 |
-42:08:57.1 |
HIP 91629 |
4.16 |
| 2026-08-08 00:00 |
18:40:25.64 |
-42:08:35.4 |
HIP 91629 |
8.91 |
| 2026-08-08 12:00 |
18:40:00.10 |
-42:08:12.3 |
HIP 91519 |
7.66 |
| 2026-08-09 00:00 |
18:39:34.76 |
-42:07:48.0 |
HIP 91519 |
8.26 |
| 2026-08-09 12:00 |
18:39:09.64 |
-42:07:22.5 |
HIP 91519 |
11.04 |
| 2026-08-10 00:00 |
18:38:44.73 |
-42:06:55.7 |
HIP 91519 |
14.79 |
| 2026-08-10 12:00 |
18:38:20.04 |
-42:06:27.7 |
HIP 91519 |
18.91 |
| 2026-08-11 00:00 |
18:37:55.58 |
-42:05:58.6 |
HIP 91519 |
23.18 |
| 2026-08-11 12:00 |
18:37:31.33 |
-42:05:28.2 |
HIP 91519 |
27.51 |
| 2026-08-12 00:00 |
18:37:07.32 |
-42:04:56.7 |
HIP 91232 |
25.75 |
| 2026-08-12 12:00 |
18:36:43.53 |
-42:04:24.0 |
HIP 91232 |
24.59 |
| 2026-08-13 00:00 |
18:36:19.97 |
-42:03:50.2 |
HIP 91232 |
24.19 |
| 2026-08-13 12:00 |
18:35:56.65 |
-42:03:15.2 |
HIP 91232 |
24.57 |
| 2026-08-14 00:00 |
18:35:33.56 |
-42:02:39.2 |
HIP 91232 |
25.65 |
| 2026-08-14 12:00 |
18:35:10.71 |
-42:02:02.1 |
HIP 90982 |
25.03 |
| 2026-08-15 00:00 |
18:34:48.10 |
-42:01:23.9 |
HIP 90982 |
22.57 |
| 2026-08-15 12:00 |
18:34:25.74 |
-42:00:44.6 |
HIP 90982 |
20.74 |
| 2026-08-16 00:00 |
18:34:03.61 |
-42:00:04.4 |
HIP 90982 |
19.68 |
| 2026-08-16 12:00 |
18:33:41.74 |
-41:59:23.1 |
HIP 90982 |
19.48 |
| 2026-08-17 00:00 |
18:33:20.11 |
-41:58:40.8 |
HIP 90941 |
19.90 |
| 2026-08-17 12:00 |
18:32:58.73 |
-41:57:57.5 |
HIP 90941 |
18.93 |
| 2026-08-18 00:00 |
18:32:37.61 |
-41:57:13.3 |
HIP 90759 |
17.77 |
| 2026-08-18 12:00 |
18:32:16.73 |
-41:56:28.1 |
HIP 90759 |
13.82 |
| 2026-08-19 00:00 |
18:31:56.11 |
-41:55:42.0 |
HIP 90759 |
9.93 |