메타데이터
| 항목 |
값 |
| Designation |
353P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-12-20T22:45:57.018240Z |
| Orbit solution date (soln_date, UTC) |
2026-09-21T07:12:14Z |
| Obs used |
178 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-11-06.0000000 |
| e |
0.46913455 |
| q (au) |
2.214006 |
| a (au) |
4.170560 |
| i (deg) |
28.414324 |
| Ω (om, deg) |
121.574423 |
| ω (w, deg) |
230.393631 |
| M (ma, deg) |
354.798501 |
밝기
산란 + 전체 선형
$$
M_a = (11.324 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.324 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
10.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
03:19:11.05 |
-26:06:58.6 |
HIP 15343 |
22.91 |
| 2026-09-20 12:00 |
03:19:16.41 |
-26:12:43.2 |
HIP 15582 |
20.29 |
| 2026-09-21 00:00 |
03:19:21.27 |
-26:18:26.2 |
HIP 15582 |
18.70 |
| 2026-09-21 12:00 |
03:19:25.64 |
-26:24:07.4 |
HIP 15582 |
18.96 |
| 2026-09-22 00:00 |
03:19:29.51 |
-26:29:46.7 |
HIP 15585 |
18.17 |
| 2026-09-22 12:00 |
03:19:32.89 |
-26:35:24.1 |
HIP 15585 |
16.19 |
| 2026-09-23 00:00 |
03:19:35.77 |
-26:40:59.6 |
HIP 15585 |
16.18 |
| 2026-09-23 12:00 |
03:19:38.16 |
-26:46:32.9 |
HIP 15585 |
18.09 |
| 2026-09-24 00:00 |
03:19:40.06 |
-26:52:04.2 |
HIP 15585 |
21.38 |
| 2026-09-24 12:00 |
03:19:41.47 |
-26:57:33.2 |
HIP 15585 |
25.49 |
| 2026-09-25 00:00 |
03:19:42.39 |
-27:03:00.0 |
HIP 15386 |
25.73 |
| 2026-09-25 12:00 |
03:19:42.81 |
-27:08:24.4 |
HIP 15386 |
22.16 |
| 2026-09-26 00:00 |
03:19:42.75 |
-27:13:46.4 |
HIP 15386 |
19.38 |
| 2026-09-26 12:00 |
03:19:42.21 |
-27:19:06.0 |
HIP 15386 |
17.71 |
| 2026-09-27 00:00 |
03:19:41.17 |
-27:24:22.9 |
HIP 15386 |
17.46 |
| 2026-09-27 12:00 |
03:19:39.66 |
-27:29:37.2 |
HIP 15386 |
18.64 |
| 2026-09-28 00:00 |
03:19:37.65 |
-27:34:48.8 |
HIP 15386 |
20.99 |
| 2026-09-28 12:00 |
03:19:35.17 |
-27:39:57.6 |
HIP 15386 |
24.14 |
| 2026-09-29 00:00 |
03:19:32.21 |
-27:45:03.5 |
HIP 15312 |
26.17 |
| 2026-09-29 12:00 |
03:19:28.76 |
-27:50:06.6 |
HIP 15312 |
26.53 |
| 2026-09-30 00:00 |
03:19:24.84 |
-27:55:06.6 |
HIP 15312 |
27.73 |
| 2026-09-30 12:00 |
03:19:20.45 |
-28:00:03.5 |
HIP 15312 |
29.64 |
| 2026-10-01 00:00 |
03:19:15.58 |
-28:04:57.2 |
HIP 15312 |
32.12 |
| 2026-10-01 12:00 |
03:19:10.24 |
-28:09:47.7 |
HIP 15312 |
35.05 |
| 2026-10-02 00:00 |
03:19:04.43 |
-28:14:34.9 |
HIP 15526 |
34.87 |
| 2026-10-02 12:00 |
03:18:58.15 |
-28:19:18.7 |
HIP 15357 |
31.02 |
| 2026-10-03 00:00 |
03:18:51.41 |
-28:23:59.0 |
HIP 15357 |
26.15 |
| 2026-10-03 12:00 |
03:18:44.21 |
-28:28:35.7 |
HIP 15357 |
21.29 |
| 2026-10-04 00:00 |
03:18:36.55 |
-28:33:08.8 |
HIP 15357 |
16.47 |
| 2026-10-04 12:00 |
03:18:28.44 |
-28:37:38.2 |
HIP 15357 |
11.67 |
| 2026-10-05 00:00 |
03:18:19.87 |
-28:42:03.8 |
HIP 15357 |
6.90 |
| 2026-10-05 12:00 |
03:18:10.85 |
-28:46:25.5 |
HIP 15357 |
2.30 |
| 2026-10-06 00:00 |
03:18:01.39 |
-28:50:43.3 |
HIP 15357 |
2.91 |
| 2026-10-06 12:00 |
03:17:51.49 |
-28:54:57.0 |
HIP 15357 |
7.52 |
| 2026-10-07 00:00 |
03:17:41.16 |
-28:59:06.6 |
HIP 15357 |
12.22 |
| 2026-10-07 12:00 |
03:17:30.39 |
-29:03:12.0 |
HIP 15357 |
16.91 |
| 2026-10-08 00:00 |
03:17:19.19 |
-29:07:13.1 |
HIP 15357 |
21.58 |
| 2026-10-08 12:00 |
03:17:07.58 |
-29:11:09.8 |
HIP 15260 |
24.28 |
| 2026-10-09 00:00 |
03:16:55.54 |
-29:15:02.1 |
HIP 15260 |
20.13 |
| 2026-10-09 12:00 |
03:16:43.09 |
-29:18:49.9 |
HIP 15260 |
16.36 |
| 2026-10-10 00:00 |
03:16:30.24 |
-29:22:33.1 |
HIP 15260 |
13.27 |
| 2026-10-10 12:00 |
03:16:16.99 |
-29:26:11.6 |
HIP 15260 |
11.42 |
| 2026-10-11 00:00 |
03:16:03.34 |
-29:29:45.4 |
HIP 15260 |
11.42 |