메타데이터
| 항목 |
값 |
| Designation |
C/1999 H3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-08-18T05:16:31.920960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:59Z |
| Obs used |
847 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-02-08.0000000 |
| e |
1.00296415 |
| q (au) |
3.500834 |
| a (au) |
-1181.056590 |
| i (deg) |
115.837319 |
| Ω (om, deg) |
332.729392 |
| ω (w, deg) |
101.910427 |
| M (ma, deg) |
0.004220 |
밝기
산란 + 전체 선형
$$
M_a = (5.669 + 4.197\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.669 |
| n |
4.197 |
| gf |
0.894 |
| gb |
-0.935 |
| 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) |
| 2026-03-26 00:00 |
06:26:00.82 |
-34:41:48.0 |
HIP 30577 |
21.08 |
| 2026-03-26 12:00 |
06:26:00.59 |
-34:41:16.8 |
HIP 30544 |
20.69 |
| 2026-03-27 00:00 |
06:26:00.39 |
-34:40:45.6 |
HIP 30544 |
20.21 |
| 2026-03-27 12:00 |
06:26:00.22 |
-34:40:14.4 |
HIP 30544 |
19.73 |
| 2026-03-28 00:00 |
06:26:00.07 |
-34:39:43.2 |
HIP 30544 |
19.25 |
| 2026-03-28 12:00 |
06:25:59.95 |
-34:39:12.1 |
HIP 30544 |
18.78 |
| 2026-03-29 00:00 |
06:25:59.85 |
-34:38:41.0 |
HIP 30544 |
18.32 |
| 2026-03-29 12:00 |
06:25:59.78 |
-34:38:09.9 |
HIP 30544 |
17.86 |
| 2026-03-30 00:00 |
06:25:59.74 |
-34:37:38.9 |
HIP 30544 |
17.41 |
| 2026-03-30 12:00 |
06:25:59.72 |
-34:37:07.8 |
HIP 30544 |
16.97 |
| 2026-03-31 00:00 |
06:25:59.73 |
-34:36:36.9 |
HIP 30544 |
16.54 |
| 2026-03-31 12:00 |
06:25:59.77 |
-34:36:05.9 |
HIP 30544 |
16.11 |
| 2026-04-01 00:00 |
06:25:59.83 |
-34:35:35.0 |
HIP 30544 |
15.69 |
| 2026-04-01 12:00 |
06:25:59.92 |
-34:35:04.1 |
HIP 30544 |
15.28 |
| 2026-04-02 00:00 |
06:26:00.03 |
-34:34:33.3 |
HIP 30544 |
14.88 |
| 2026-04-02 12:00 |
06:26:00.17 |
-34:34:02.5 |
HIP 30544 |
14.50 |
| 2026-04-03 00:00 |
06:26:00.34 |
-34:33:31.8 |
HIP 30544 |
14.12 |
| 2026-04-03 12:00 |
06:26:00.53 |
-34:33:01.1 |
HIP 30544 |
13.76 |
| 2026-04-04 00:00 |
06:26:00.75 |
-34:32:30.4 |
HIP 30544 |
13.41 |
| 2026-04-04 12:00 |
06:26:00.99 |
-34:31:59.8 |
HIP 30544 |
13.08 |
| 2026-04-05 00:00 |
06:26:01.26 |
-34:31:29.3 |
HIP 30544 |
12.76 |
| 2026-04-05 12:00 |
06:26:01.56 |
-34:30:58.8 |
HIP 30544 |
12.47 |
| 2026-04-06 00:00 |
06:26:01.88 |
-34:30:28.4 |
HIP 30544 |
12.19 |
| 2026-04-06 12:00 |
06:26:02.22 |
-34:29:58.1 |
HIP 30544 |
11.93 |
| 2026-04-07 00:00 |
06:26:02.60 |
-34:29:27.8 |
HIP 30544 |
11.69 |
| 2026-04-07 12:00 |
06:26:02.99 |
-34:28:57.6 |
HIP 30544 |
11.48 |
| 2026-04-08 00:00 |
06:26:03.42 |
-34:28:27.4 |
HIP 30544 |
11.28 |
| 2026-04-08 12:00 |
06:26:03.87 |
-34:27:57.3 |
HIP 30544 |
11.12 |
| 2026-04-09 00:00 |
06:26:04.34 |
-34:27:27.3 |
HIP 30544 |
10.98 |
| 2026-04-09 12:00 |
06:26:04.84 |
-34:26:57.4 |
HIP 30544 |
10.87 |
| 2026-04-10 00:00 |
06:26:05.36 |
-34:26:27.5 |
HIP 30544 |
10.79 |
| 2026-04-10 12:00 |
06:26:05.91 |
-34:25:57.7 |
HIP 30544 |
10.73 |
| 2026-04-11 00:00 |
06:26:06.49 |
-34:25:28.0 |
HIP 30544 |
10.71 |
| 2026-04-11 12:00 |
06:26:07.09 |
-34:24:58.4 |
HIP 30544 |
10.71 |
| 2026-04-12 00:00 |
06:26:07.71 |
-34:24:28.9 |
HIP 30544 |
10.75 |
| 2026-04-12 12:00 |
06:26:08.36 |
-34:23:59.4 |
HIP 30544 |
10.81 |
| 2026-04-13 00:00 |
06:26:09.03 |
-34:23:30.1 |
HIP 30544 |
10.90 |
| 2026-04-13 12:00 |
06:26:09.73 |
-34:23:00.8 |
HIP 30544 |
11.02 |
| 2026-04-14 00:00 |
06:26:10.46 |
-34:22:31.6 |
HIP 30544 |
11.17 |
| 2026-04-14 12:00 |
06:26:11.21 |
-34:22:02.6 |
HIP 30544 |
11.34 |
| 2026-04-15 00:00 |
06:26:11.98 |
-34:21:33.6 |
HIP 30544 |
11.54 |
| 2026-04-15 12:00 |
06:26:12.77 |
-34:21:04.7 |
HIP 30544 |
11.76 |
| 2026-04-16 00:00 |
06:26:13.60 |
-34:20:36.0 |
HIP 30544 |
12.00 |