메타데이터
| 항목 |
값 |
| Designation |
C/2002 O4 (Hoenig) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-10-01T23:33:55.399680Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:12:51Z |
| Obs used |
1195 |
| NEO |
- |
| M1 |
13.300 |
| K1 |
8.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-08-13.0000000 |
| e |
1.00085552 |
| q (au) |
0.776209 |
| a (au) |
-907.293712 |
| i (deg) |
73.126827 |
| Ω (om, deg) |
321.040639 |
| ω (w, deg) |
105.936774 |
| M (ma, deg) |
-0.001803 |
밝기
산란 + 전체 선형
$$
M_a = (9.577 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.577 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2002-07-22 |
2002-08-14 |
+37.8142 |
-4.484 |
| 2002-08-14 |
2002-10-01 |
-12.0631 |
+0.022 |
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 |
09:00:38.35 |
-74:58:07.7 |
HIP 44473 |
16.18 |
| 2026-07-29 12:00 |
09:00:47.66 |
-74:58:04.2 |
HIP 44473 |
15.80 |
| 2026-07-30 00:00 |
09:00:56.99 |
-74:58:01.0 |
HIP 44473 |
15.42 |
| 2026-07-30 12:00 |
09:01:06.31 |
-74:57:58.1 |
HIP 44473 |
15.05 |
| 2026-07-31 00:00 |
09:01:15.65 |
-74:57:55.5 |
HIP 44473 |
14.69 |
| 2026-07-31 12:00 |
09:01:24.99 |
-74:57:53.2 |
HIP 44473 |
14.35 |
| 2026-08-01 00:00 |
09:01:34.33 |
-74:57:51.1 |
HIP 44473 |
14.02 |
| 2026-08-01 12:00 |
09:01:43.68 |
-74:57:49.4 |
HIP 44473 |
13.70 |
| 2026-08-02 00:00 |
09:01:53.03 |
-74:57:48.0 |
HIP 44473 |
13.40 |
| 2026-08-02 12:00 |
09:02:02.38 |
-74:57:46.9 |
HIP 44473 |
13.11 |
| 2026-08-03 00:00 |
09:02:11.74 |
-74:57:46.0 |
HIP 44473 |
12.85 |
| 2026-08-03 12:00 |
09:02:21.10 |
-74:57:45.5 |
HIP 44473 |
12.60 |
| 2026-08-04 00:00 |
09:02:30.46 |
-74:57:45.2 |
HIP 44473 |
12.37 |
| 2026-08-04 12:00 |
09:02:39.82 |
-74:57:45.3 |
HIP 44473 |
12.16 |
| 2026-08-05 00:00 |
09:02:49.18 |
-74:57:45.7 |
HIP 44473 |
11.97 |
| 2026-08-05 12:00 |
09:02:58.55 |
-74:57:46.3 |
HIP 44473 |
11.81 |
| 2026-08-06 00:00 |
09:03:07.91 |
-74:57:47.3 |
HIP 44473 |
11.67 |
| 2026-08-06 12:00 |
09:03:17.27 |
-74:57:48.5 |
HIP 44473 |
11.56 |
| 2026-08-07 00:00 |
09:03:26.63 |
-74:57:50.1 |
HIP 44473 |
11.47 |
| 2026-08-07 12:00 |
09:03:35.99 |
-74:57:51.9 |
HIP 44473 |
11.41 |
| 2026-08-08 00:00 |
09:03:45.35 |
-74:57:54.1 |
HIP 44473 |
11.37 |
| 2026-08-08 12:00 |
09:03:54.70 |
-74:57:56.5 |
HIP 44473 |
11.36 |
| 2026-08-09 00:00 |
09:04:04.05 |
-74:57:59.3 |
HIP 44473 |
11.38 |
| 2026-08-09 12:00 |
09:04:13.40 |
-74:58:02.4 |
HIP 44473 |
11.43 |
| 2026-08-10 00:00 |
09:04:22.74 |
-74:58:05.7 |
HIP 44473 |
11.50 |
| 2026-08-10 12:00 |
09:04:32.08 |
-74:58:09.4 |
HIP 44473 |
11.60 |
| 2026-08-11 00:00 |
09:04:41.41 |
-74:58:13.3 |
HIP 44473 |
11.72 |
| 2026-08-11 12:00 |
09:04:50.74 |
-74:58:17.6 |
HIP 44473 |
11.87 |
| 2026-08-12 00:00 |
09:05:00.06 |
-74:58:22.1 |
HIP 44473 |
12.04 |
| 2026-08-12 12:00 |
09:05:09.37 |
-74:58:27.0 |
HIP 44473 |
12.24 |
| 2026-08-13 00:00 |
09:05:18.67 |
-74:58:32.1 |
HIP 44473 |
12.46 |
| 2026-08-13 12:00 |
09:05:27.97 |
-74:58:37.6 |
HIP 44473 |
12.69 |
| 2026-08-14 00:00 |
09:05:37.26 |
-74:58:43.3 |
HIP 44473 |
12.95 |
| 2026-08-14 12:00 |
09:05:46.53 |
-74:58:49.4 |
HIP 44473 |
13.23 |
| 2026-08-15 00:00 |
09:05:55.80 |
-74:58:55.7 |
HIP 44473 |
13.52 |
| 2026-08-15 12:00 |
09:06:05.06 |
-74:59:02.4 |
HIP 44473 |
13.83 |
| 2026-08-16 00:00 |
09:06:14.30 |
-74:59:09.3 |
HIP 44699 |
13.96 |
| 2026-08-16 12:00 |
09:06:23.53 |
-74:59:16.6 |
HIP 44699 |
14.04 |
| 2026-08-17 00:00 |
09:06:32.76 |
-74:59:24.1 |
HIP 44699 |
14.16 |
| 2026-08-17 12:00 |
09:06:41.96 |
-74:59:32.0 |
HIP 44699 |
14.31 |
| 2026-08-18 00:00 |
09:06:51.16 |
-74:59:40.1 |
HIP 44699 |
14.48 |
| 2026-08-18 12:00 |
09:07:00.34 |
-74:59:48.5 |
HIP 44699 |
14.69 |
| 2026-08-19 00:00 |
09:07:09.50 |
-74:59:57.2 |
HIP 44699 |
14.92 |