메타데이터
| 항목 |
값 |
| Designation |
130P/McNaught-Hughes |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-01-21T18:21:27.048960Z |
| Orbit solution date (soln_date, UTC) |
2025-12-29T09:23:47Z |
| Obs used |
2366 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-03-01.0000000 |
| e |
0.46080056 |
| q (au) |
1.823638 |
| a (au) |
3.382121 |
| i (deg) |
6.065359 |
| Ω (om, deg) |
70.255716 |
| ω (w, deg) |
245.911679 |
| M (ma, deg) |
6.058743 |
밝기
산란 + 전체 선형
$$
M_a = (10.080 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.080 |
| n |
6.000 |
| gf |
0.880 |
| gb |
-0.718 |
| k |
0.973 |
| 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 |
| 2022-03-07 |
2024-10-22 |
+6.2419 |
-2.381 |
| 2024-10-22 |
2025-12-21 |
+6.4393 |
-2.799 |
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 |
08:01:02.54 |
+24:08:55.1 |
HIP 39235 |
15.51 |
| 2026-07-29 12:00 |
08:01:32.07 |
+24:07:43.1 |
HIP 39235 |
12.96 |
| 2026-07-30 00:00 |
08:02:01.57 |
+24:06:31.1 |
HIP 39235 |
13.75 |
| 2026-07-30 12:00 |
08:02:31.04 |
+24:05:18.9 |
HIP 39235 |
17.43 |
| 2026-07-31 00:00 |
08:03:00.48 |
+24:04:06.5 |
HIP 39235 |
22.62 |
| 2026-07-31 12:00 |
08:03:29.88 |
+24:02:54.1 |
HIP 39528 |
23.71 |
| 2026-08-01 00:00 |
08:03:59.26 |
+24:01:41.5 |
HIP 39528 |
20.66 |
| 2026-08-01 12:00 |
08:04:28.60 |
+24:00:28.8 |
HIP 39528 |
19.60 |
| 2026-08-02 00:00 |
08:04:57.90 |
+23:59:16.0 |
HIP 39528 |
20.83 |
| 2026-08-02 12:00 |
08:05:27.18 |
+23:58:03.1 |
HIP 39686 |
19.22 |
| 2026-08-03 00:00 |
08:05:56.41 |
+23:56:50.0 |
HIP 39686 |
15.14 |
| 2026-08-03 12:00 |
08:06:25.61 |
+23:55:36.9 |
HIP 39686 |
13.45 |
| 2026-08-04 00:00 |
08:06:54.78 |
+23:54:23.6 |
HIP 39790 |
14.53 |
| 2026-08-04 12:00 |
08:07:23.91 |
+23:53:10.3 |
HIP 39790 |
10.08 |
| 2026-08-05 00:00 |
08:07:53.00 |
+23:51:56.8 |
HIP 39790 |
9.15 |
| 2026-08-05 12:00 |
08:08:22.06 |
+23:50:43.3 |
HIP 39790 |
12.54 |
| 2026-08-06 00:00 |
08:08:51.08 |
+23:49:29.7 |
HIP 39790 |
17.93 |
| 2026-08-06 12:00 |
08:09:20.06 |
+23:48:16.0 |
HIP 39790 |
24.02 |
| 2026-08-07 00:00 |
08:09:49.00 |
+23:47:02.2 |
HIP 40102 |
29.50 |
| 2026-08-07 12:00 |
08:10:17.90 |
+23:45:48.3 |
HIP 40102 |
23.72 |
| 2026-08-08 00:00 |
08:10:46.75 |
+23:44:34.3 |
HIP 40102 |
18.60 |
| 2026-08-08 12:00 |
08:11:15.57 |
+23:43:20.3 |
HIP 40102 |
14.81 |
| 2026-08-09 00:00 |
08:11:44.35 |
+23:42:06.2 |
HIP 40102 |
13.53 |
| 2026-08-09 12:00 |
08:12:13.08 |
+23:40:52.1 |
HIP 40102 |
15.38 |
| 2026-08-10 00:00 |
08:12:41.77 |
+23:39:37.8 |
HIP 40102 |
19.48 |
| 2026-08-10 12:00 |
08:13:10.41 |
+23:38:23.6 |
HIP 40102 |
24.72 |
| 2026-08-11 00:00 |
08:13:39.01 |
+23:37:09.3 |
HIP 40421 |
21.98 |
| 2026-08-11 12:00 |
08:14:07.57 |
+23:35:54.9 |
HIP 40421 |
16.65 |
| 2026-08-12 00:00 |
08:14:36.07 |
+23:34:40.5 |
HIP 40421 |
12.64 |
| 2026-08-12 12:00 |
08:15:04.53 |
+23:33:26.0 |
HIP 40421 |
11.43 |
| 2026-08-13 00:00 |
08:15:32.94 |
+23:32:11.6 |
HIP 40421 |
13.77 |
| 2026-08-13 12:00 |
08:16:01.31 |
+23:30:57.1 |
HIP 40421 |
18.33 |
| 2026-08-14 00:00 |
08:16:29.62 |
+23:29:42.6 |
HIP 40421 |
23.87 |
| 2026-08-14 12:00 |
08:16:57.88 |
+23:28:28.0 |
HIP 40421 |
29.83 |
| 2026-08-15 00:00 |
08:17:26.09 |
+23:27:13.5 |
HIP 40529 |
33.23 |
| 2026-08-15 12:00 |
08:17:54.25 |
+23:25:58.9 |
HIP 40529 |
35.11 |
| 2026-08-16 00:00 |
08:18:22.36 |
+23:24:44.3 |
HIP 40833 |
32.79 |
| 2026-08-16 12:00 |
08:18:50.42 |
+23:23:29.8 |
HIP 40833 |
29.80 |
| 2026-08-17 00:00 |
08:19:18.42 |
+23:22:15.2 |
HIP 40915 |
24.72 |
| 2026-08-17 12:00 |
08:19:46.36 |
+23:21:00.7 |
HIP 40915 |
18.26 |
| 2026-08-18 00:00 |
08:20:14.25 |
+23:19:46.1 |
HIP 40915 |
11.90 |
| 2026-08-18 12:00 |
08:20:42.09 |
+23:18:31.6 |
HIP 40915 |
5.90 |
| 2026-08-19 00:00 |
08:21:09.87 |
+23:17:17.1 |
HIP 40915 |
3.60 |