메타데이터
| 항목 |
값 |
| Designation |
C/2012 CH17 (MOSS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-09-28T05:20:29.244480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:03Z |
| Obs used |
627 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-04-06.0000000 |
| e |
0.99998818 |
| q (au) |
1.296093 |
| a (au) |
109657.782316 |
| i (deg) |
27.744192 |
| Ω (om, deg) |
125.984715 |
| ω (w, deg) |
137.993552 |
| M (ma, deg) |
359.999995 |
밝기
산란 + 전체 선형
$$
M_a = (12.872 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.872 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:23:12.45 |
-03:04:36.7 |
HIP 20507 |
40.73 |
| 2026-06-01 12:00 |
04:23:16.25 |
-03:04:28.5 |
HIP 20507 |
40.71 |
| 2026-06-02 00:00 |
04:23:20.05 |
-03:04:20.6 |
HIP 20507 |
40.71 |
| 2026-06-02 12:00 |
04:23:23.84 |
-03:04:12.8 |
HIP 20507 |
40.73 |
| 2026-06-03 00:00 |
04:23:27.63 |
-03:04:05.3 |
HIP 20507 |
40.77 |
| 2026-06-03 12:00 |
04:23:31.42 |
-03:03:57.9 |
HIP 20507 |
40.82 |
| 2026-06-04 00:00 |
04:23:35.21 |
-03:03:50.8 |
HIP 20507 |
40.90 |
| 2026-06-04 12:00 |
04:23:38.99 |
-03:03:43.8 |
HIP 20507 |
40.99 |
| 2026-06-05 00:00 |
04:23:42.77 |
-03:03:37.0 |
HIP 20507 |
41.11 |
| 2026-06-05 12:00 |
04:23:46.55 |
-03:03:30.5 |
HIP 20507 |
41.24 |
| 2026-06-06 00:00 |
04:23:50.32 |
-03:03:24.1 |
HIP 20507 |
41.39 |
| 2026-06-06 12:00 |
04:23:54.09 |
-03:03:17.9 |
HIP 20507 |
41.55 |
| 2026-06-07 00:00 |
04:23:57.85 |
-03:03:12.0 |
HIP 20507 |
41.74 |
| 2026-06-07 12:00 |
04:24:01.61 |
-03:03:06.2 |
HIP 20507 |
41.94 |
| 2026-06-08 00:00 |
04:24:05.37 |
-03:03:00.6 |
HIP 20507 |
42.15 |
| 2026-06-08 12:00 |
04:24:09.12 |
-03:02:55.3 |
HIP 20507 |
42.39 |
| 2026-06-09 00:00 |
04:24:12.87 |
-03:02:50.1 |
HIP 20507 |
42.64 |
| 2026-06-09 12:00 |
04:24:16.61 |
-03:02:45.2 |
HIP 20507 |
42.90 |
| 2026-06-10 00:00 |
04:24:20.35 |
-03:02:40.4 |
HIP 20507 |
43.18 |
| 2026-06-10 12:00 |
04:24:24.08 |
-03:02:35.8 |
HIP 20507 |
43.48 |
| 2026-06-11 00:00 |
04:24:27.80 |
-03:02:31.5 |
HIP 20507 |
43.79 |
| 2026-06-11 12:00 |
04:24:31.52 |
-03:02:27.4 |
HIP 20507 |
44.11 |
| 2026-06-12 00:00 |
04:24:35.23 |
-03:02:23.4 |
HIP 20507 |
44.45 |
| 2026-06-12 12:00 |
04:24:38.93 |
-03:02:19.7 |
HIP 20507 |
44.80 |
| 2026-06-13 00:00 |
04:24:42.63 |
-03:02:16.1 |
HIP 20507 |
45.16 |
| 2026-06-13 12:00 |
04:24:46.32 |
-03:02:12.8 |
HIP 20643 |
45.04 |
| 2026-06-14 00:00 |
04:24:50.01 |
-03:02:09.7 |
HIP 20643 |
44.90 |
| 2026-06-14 12:00 |
04:24:53.68 |
-03:02:06.8 |
HIP 20643 |
44.77 |
| 2026-06-15 00:00 |
04:24:57.35 |
-03:02:04.1 |
HIP 20643 |
44.66 |
| 2026-06-15 12:00 |
04:25:01.01 |
-03:02:01.6 |
HIP 20643 |
44.56 |
| 2026-06-16 00:00 |
04:25:04.66 |
-03:01:59.3 |
HIP 20643 |
44.48 |
| 2026-06-16 12:00 |
04:25:08.30 |
-03:01:57.2 |
HIP 20643 |
44.42 |
| 2026-06-17 00:00 |
04:25:11.94 |
-03:01:55.3 |
HIP 20643 |
44.37 |
| 2026-06-17 12:00 |
04:25:15.56 |
-03:01:53.6 |
HIP 20643 |
44.33 |
| 2026-06-18 00:00 |
04:25:19.18 |
-03:01:52.2 |
HIP 20643 |
44.31 |
| 2026-06-18 12:00 |
04:25:22.78 |
-03:01:50.9 |
HIP 20643 |
44.30 |
| 2026-06-19 00:00 |
04:25:26.38 |
-03:01:49.8 |
HIP 20643 |
44.31 |
| 2026-06-19 12:00 |
04:25:29.96 |
-03:01:49.0 |
HIP 20643 |
44.34 |
| 2026-06-20 00:00 |
04:25:33.54 |
-03:01:48.3 |
HIP 20643 |
44.38 |
| 2026-06-20 12:00 |
04:25:37.10 |
-03:01:47.9 |
HIP 20643 |
44.43 |
| 2026-06-21 00:00 |
04:25:40.66 |
-03:01:47.6 |
HIP 20643 |
44.50 |
| 2026-06-21 12:00 |
04:25:44.20 |
-03:01:47.6 |
HIP 20643 |
44.58 |
| 2026-06-22 00:00 |
04:25:47.73 |
-03:01:47.8 |
HIP 20643 |
44.67 |