메타데이터
| 항목 |
값 |
| Designation |
C/2000 O1 (Koehn) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-01-27T17:38:15.144000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:05Z |
| Obs used |
64 |
| NEO |
- |
| M1 |
5.100 |
| K1 |
11.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-05-14.0000000 |
| e |
1.00000217 |
| q (au) |
5.921780 |
| a (au) |
-2729545.221721 |
| i (deg) |
148.104189 |
| Ω (om, deg) |
88.882672 |
| ω (w, deg) |
55.164253 |
| M (ma, deg) |
0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (2.023 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.023 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
17:01:39.29 |
-29:30:32.8 |
HIP 83280 |
12.01 |
| 2026-07-29 12:00 |
17:01:37.13 |
-29:30:28.0 |
HIP 83280 |
11.86 |
| 2026-07-30 00:00 |
17:01:34.99 |
-29:30:23.2 |
HIP 83280 |
11.73 |
| 2026-07-30 12:00 |
17:01:32.87 |
-29:30:18.5 |
HIP 83280 |
11.62 |
| 2026-07-31 00:00 |
17:01:30.77 |
-29:30:13.7 |
HIP 83280 |
11.53 |
| 2026-07-31 12:00 |
17:01:28.70 |
-29:30:08.9 |
HIP 83280 |
11.46 |
| 2026-08-01 00:00 |
17:01:26.64 |
-29:30:04.1 |
HIP 83280 |
11.41 |
| 2026-08-01 12:00 |
17:01:24.60 |
-29:29:59.4 |
HIP 83280 |
11.37 |
| 2026-08-02 00:00 |
17:01:22.59 |
-29:29:54.6 |
HIP 83280 |
11.36 |
| 2026-08-02 12:00 |
17:01:20.59 |
-29:29:49.8 |
HIP 83258 |
11.27 |
| 2026-08-03 00:00 |
17:01:18.62 |
-29:29:45.1 |
HIP 83258 |
11.19 |
| 2026-08-03 12:00 |
17:01:16.67 |
-29:29:40.3 |
HIP 83258 |
11.13 |
| 2026-08-04 00:00 |
17:01:14.73 |
-29:29:35.5 |
HIP 83258 |
11.09 |
| 2026-08-04 12:00 |
17:01:12.83 |
-29:29:30.8 |
HIP 83258 |
11.07 |
| 2026-08-05 00:00 |
17:01:10.94 |
-29:29:26.0 |
HIP 83258 |
11.06 |
| 2026-08-05 12:00 |
17:01:09.07 |
-29:29:21.3 |
HIP 83258 |
11.07 |
| 2026-08-06 00:00 |
17:01:07.23 |
-29:29:16.6 |
HIP 83258 |
11.10 |
| 2026-08-06 12:00 |
17:01:05.41 |
-29:29:11.8 |
HIP 83258 |
11.14 |
| 2026-08-07 00:00 |
17:01:03.61 |
-29:29:07.1 |
HIP 83258 |
11.19 |
| 2026-08-07 12:00 |
17:01:01.83 |
-29:29:02.4 |
HIP 83258 |
11.26 |
| 2026-08-08 00:00 |
17:01:00.07 |
-29:28:57.7 |
HIP 83258 |
11.34 |
| 2026-08-08 12:00 |
17:00:58.34 |
-29:28:53.0 |
HIP 83258 |
11.44 |
| 2026-08-09 00:00 |
17:00:56.63 |
-29:28:48.3 |
HIP 83258 |
11.54 |
| 2026-08-09 12:00 |
17:00:54.94 |
-29:28:43.6 |
HIP 83258 |
11.66 |
| 2026-08-10 00:00 |
17:00:53.28 |
-29:28:39.0 |
HIP 83258 |
11.79 |
| 2026-08-10 12:00 |
17:00:51.64 |
-29:28:34.3 |
HIP 83258 |
11.92 |
| 2026-08-11 00:00 |
17:00:50.02 |
-29:28:29.7 |
HIP 83258 |
12.07 |
| 2026-08-11 12:00 |
17:00:48.42 |
-29:28:25.0 |
HIP 83258 |
12.22 |
| 2026-08-12 00:00 |
17:00:46.85 |
-29:28:20.4 |
HIP 83258 |
12.37 |
| 2026-08-12 12:00 |
17:00:45.31 |
-29:28:15.8 |
HIP 83258 |
12.54 |
| 2026-08-13 00:00 |
17:00:43.78 |
-29:28:11.2 |
HIP 83258 |
12.71 |
| 2026-08-13 12:00 |
17:00:42.28 |
-29:28:06.6 |
HIP 83258 |
12.88 |
| 2026-08-14 00:00 |
17:00:40.80 |
-29:28:02.1 |
HIP 83258 |
13.06 |
| 2026-08-14 12:00 |
17:00:39.35 |
-29:27:57.5 |
HIP 83258 |
13.24 |
| 2026-08-15 00:00 |
17:00:37.92 |
-29:27:53.0 |
HIP 83258 |
13.43 |
| 2026-08-15 12:00 |
17:00:36.52 |
-29:27:48.4 |
HIP 83258 |
13.62 |
| 2026-08-16 00:00 |
17:00:35.13 |
-29:27:43.9 |
HIP 83258 |
13.81 |
| 2026-08-16 12:00 |
17:00:33.78 |
-29:27:39.4 |
HIP 83258 |
14.00 |
| 2026-08-17 00:00 |
17:00:32.44 |
-29:27:35.0 |
HIP 83258 |
14.20 |
| 2026-08-17 12:00 |
17:00:31.14 |
-29:27:30.5 |
HIP 83258 |
14.39 |
| 2026-08-18 00:00 |
17:00:29.85 |
-29:27:26.1 |
HIP 83258 |
14.59 |
| 2026-08-18 12:00 |
17:00:28.59 |
-29:27:21.7 |
HIP 83258 |
14.78 |
| 2026-08-19 00:00 |
17:00:27.36 |
-29:27:17.3 |
HIP 83258 |
14.98 |