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
$$
M_a = (5.667 + 4.199\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.667 |
| n |
4.199 |
| gf |
0.907 |
| 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) |
| 2026-09-20 00:00 |
06:36:49.50 |
-34:38:23.3 |
HIP 31701 |
24.50 |
| 2026-09-20 12:00 |
06:36:49.89 |
-34:38:55.4 |
HIP 31701 |
24.91 |
| 2026-09-21 00:00 |
06:36:50.26 |
-34:39:27.6 |
HIP 31701 |
25.33 |
| 2026-09-21 12:00 |
06:36:50.60 |
-34:39:59.8 |
HIP 31701 |
25.76 |
| 2026-09-22 00:00 |
06:36:50.92 |
-34:40:32.0 |
HIP 31397 |
25.88 |
| 2026-09-22 12:00 |
06:36:51.21 |
-34:41:04.3 |
HIP 31397 |
25.74 |
| 2026-09-23 00:00 |
06:36:51.48 |
-34:41:36.7 |
HIP 31397 |
25.60 |
| 2026-09-23 12:00 |
06:36:51.72 |
-34:42:09.0 |
HIP 31397 |
25.47 |
| 2026-09-24 00:00 |
06:36:51.94 |
-34:42:41.4 |
HIP 31397 |
25.35 |
| 2026-09-24 12:00 |
06:36:52.13 |
-34:43:13.8 |
HIP 31397 |
25.23 |
| 2026-09-25 00:00 |
06:36:52.30 |
-34:43:46.3 |
HIP 31397 |
25.12 |
| 2026-09-25 12:00 |
06:36:52.44 |
-34:44:18.8 |
HIP 31397 |
25.01 |
| 2026-09-26 00:00 |
06:36:52.55 |
-34:44:51.3 |
HIP 31397 |
24.91 |
| 2026-09-26 12:00 |
06:36:52.64 |
-34:45:23.8 |
HIP 31397 |
24.82 |
| 2026-09-27 00:00 |
06:36:52.71 |
-34:45:56.3 |
HIP 31397 |
24.73 |
| 2026-09-27 12:00 |
06:36:52.75 |
-34:46:28.9 |
HIP 31397 |
24.65 |
| 2026-09-28 00:00 |
06:36:52.76 |
-34:47:01.4 |
HIP 31397 |
24.58 |
| 2026-09-28 12:00 |
06:36:52.75 |
-34:47:34.0 |
HIP 31397 |
24.51 |
| 2026-09-29 00:00 |
06:36:52.71 |
-34:48:06.6 |
HIP 31397 |
24.45 |
| 2026-09-29 12:00 |
06:36:52.65 |
-34:48:39.2 |
HIP 31521 |
24.23 |
| 2026-09-30 00:00 |
06:36:52.56 |
-34:49:11.8 |
HIP 31521 |
23.74 |
| 2026-09-30 12:00 |
06:36:52.44 |
-34:49:44.4 |
HIP 31521 |
23.25 |
| 2026-10-01 00:00 |
06:36:52.30 |
-34:50:17.0 |
HIP 31521 |
22.75 |
| 2026-10-01 12:00 |
06:36:52.13 |
-34:50:49.6 |
HIP 31521 |
22.26 |
| 2026-10-02 00:00 |
06:36:51.94 |
-34:51:22.2 |
HIP 31521 |
21.77 |
| 2026-10-02 12:00 |
06:36:51.72 |
-34:51:54.8 |
HIP 31521 |
21.27 |
| 2026-10-03 00:00 |
06:36:51.47 |
-34:52:27.4 |
HIP 31521 |
20.78 |
| 2026-10-03 12:00 |
06:36:51.20 |
-34:53:00.0 |
HIP 31521 |
20.28 |
| 2026-10-04 00:00 |
06:36:50.90 |
-34:53:32.6 |
HIP 31521 |
19.79 |
| 2026-10-04 12:00 |
06:36:50.58 |
-34:54:05.1 |
HIP 31521 |
19.30 |
| 2026-10-05 00:00 |
06:36:50.23 |
-34:54:37.7 |
HIP 31521 |
18.80 |
| 2026-10-05 12:00 |
06:36:49.86 |
-34:55:10.2 |
HIP 31521 |
18.31 |
| 2026-10-06 00:00 |
06:36:49.45 |
-34:55:42.7 |
HIP 31521 |
17.82 |
| 2026-10-06 12:00 |
06:36:49.03 |
-34:56:15.1 |
HIP 31521 |
17.32 |
| 2026-10-07 00:00 |
06:36:48.57 |
-34:56:47.6 |
HIP 31521 |
16.83 |
| 2026-10-07 12:00 |
06:36:48.09 |
-34:57:20.0 |
HIP 31521 |
16.34 |
| 2026-10-08 00:00 |
06:36:47.58 |
-34:57:52.4 |
HIP 31521 |
15.85 |
| 2026-10-08 12:00 |
06:36:47.05 |
-34:58:24.7 |
HIP 31521 |
15.36 |
| 2026-10-09 00:00 |
06:36:46.49 |
-34:58:57.0 |
HIP 31521 |
14.88 |
| 2026-10-09 12:00 |
06:36:45.90 |
-34:59:29.3 |
HIP 31521 |
14.39 |
| 2026-10-10 00:00 |
06:36:45.29 |
-35:00:01.6 |
HIP 31521 |
13.91 |
| 2026-10-10 12:00 |
06:36:44.65 |
-35:00:33.7 |
HIP 31521 |
13.42 |
| 2026-10-11 00:00 |
06:36:43.99 |
-35:01:05.9 |
HIP 31521 |
12.94 |