메타데이터
| 항목 |
값 |
| Designation |
C/2000 SV74 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-30T12:44:48.128640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
2039 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
5.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-12-17.0000000 |
| e |
1.00486188 |
| q (au) |
3.541897 |
| a (au) |
-728.503515 |
| i (deg) |
75.236666 |
| Ω (om, deg) |
24.186314 |
| ω (w, deg) |
76.239354 |
| M (ma, deg) |
0.011552 |
밝기
산란 + 전체 선형
$$
M_a = (4.901 + 3.631\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.901 |
| n |
3.631 |
| gf |
0.850 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.002 |
| 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 |
| 2000-10-21 |
2002-04-10 |
-2.1213 |
+1.220 |
| 2002-04-30 |
2005-04-05 |
-2.0065 |
+1.694 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
12:54:15.26 |
-52:27:08.1 |
HIP 62946 |
10.92 |
| 2026-05-12 12:00 |
12:54:11.86 |
-52:26:44.2 |
HIP 62946 |
10.41 |
| 2026-05-13 00:00 |
12:54:08.48 |
-52:26:20.2 |
HIP 62946 |
9.92 |
| 2026-05-13 12:00 |
12:54:05.12 |
-52:25:56.1 |
HIP 62946 |
9.44 |
| 2026-05-14 00:00 |
12:54:01.78 |
-52:25:31.8 |
HIP 62946 |
8.98 |
| 2026-05-14 12:00 |
12:53:58.47 |
-52:25:07.4 |
HIP 62946 |
8.54 |
| 2026-05-15 00:00 |
12:53:55.18 |
-52:24:42.8 |
HIP 62946 |
8.13 |
| 2026-05-15 12:00 |
12:53:51.91 |
-52:24:18.1 |
HIP 62946 |
7.75 |
| 2026-05-16 00:00 |
12:53:48.67 |
-52:23:53.2 |
HIP 62946 |
7.40 |
| 2026-05-16 12:00 |
12:53:45.46 |
-52:23:28.2 |
HIP 62946 |
7.09 |
| 2026-05-17 00:00 |
12:53:42.26 |
-52:23:03.1 |
HIP 62946 |
6.82 |
| 2026-05-17 12:00 |
12:53:39.10 |
-52:22:37.8 |
HIP 62946 |
6.61 |
| 2026-05-18 00:00 |
12:53:35.95 |
-52:22:12.4 |
HIP 62946 |
6.44 |
| 2026-05-18 12:00 |
12:53:32.84 |
-52:21:46.9 |
HIP 62946 |
6.34 |
| 2026-05-19 00:00 |
12:53:29.74 |
-52:21:21.3 |
HIP 62946 |
6.29 |
| 2026-05-19 12:00 |
12:53:26.68 |
-52:20:55.5 |
HIP 62946 |
6.30 |
| 2026-05-20 00:00 |
12:53:23.64 |
-52:20:29.7 |
HIP 62946 |
6.38 |
| 2026-05-20 12:00 |
12:53:20.62 |
-52:20:03.7 |
HIP 62946 |
6.50 |
| 2026-05-21 00:00 |
12:53:17.63 |
-52:19:37.6 |
HIP 62842 |
6.14 |
| 2026-05-21 12:00 |
12:53:14.67 |
-52:19:11.3 |
HIP 62842 |
5.52 |
| 2026-05-22 00:00 |
12:53:11.74 |
-52:18:45.0 |
HIP 62842 |
4.91 |
| 2026-05-22 12:00 |
12:53:08.83 |
-52:18:18.6 |
HIP 62842 |
4.30 |
| 2026-05-23 00:00 |
12:53:05.95 |
-52:17:52.0 |
HIP 62842 |
3.70 |
| 2026-05-23 12:00 |
12:53:03.10 |
-52:17:25.4 |
HIP 62842 |
3.11 |
| 2026-05-24 00:00 |
12:53:00.27 |
-52:16:58.7 |
HIP 62842 |
2.55 |
| 2026-05-24 12:00 |
12:52:57.47 |
-52:16:31.8 |
HIP 62842 |
2.02 |
| 2026-05-25 00:00 |
12:52:54.70 |
-52:16:04.9 |
HIP 62842 |
1.56 |
| 2026-05-25 12:00 |
12:52:51.96 |
-52:15:37.9 |
HIP 62842 |
1.26 |
| 2026-05-26 00:00 |
12:52:49.24 |
-52:15:10.8 |
HIP 62842 |
1.22 |
| 2026-05-26 12:00 |
12:52:46.56 |
-52:14:43.6 |
HIP 62842 |
1.47 |
| 2026-05-27 00:00 |
12:52:43.90 |
-52:14:16.3 |
HIP 62842 |
1.89 |
| 2026-05-27 12:00 |
12:52:41.27 |
-52:13:48.9 |
HIP 62842 |
2.39 |
| 2026-05-28 00:00 |
12:52:38.67 |
-52:13:21.5 |
HIP 62842 |
2.94 |
| 2026-05-28 12:00 |
12:52:36.09 |
-52:12:54.0 |
HIP 62842 |
3.50 |
| 2026-05-29 00:00 |
12:52:33.55 |
-52:12:26.4 |
HIP 62842 |
4.08 |
| 2026-05-29 12:00 |
12:52:31.04 |
-52:11:58.7 |
HIP 62842 |
4.66 |
| 2026-05-30 00:00 |
12:52:28.55 |
-52:11:30.9 |
HIP 62842 |
5.24 |
| 2026-05-30 12:00 |
12:52:26.09 |
-52:11:03.1 |
HIP 62842 |
5.83 |
| 2026-05-31 00:00 |
12:52:23.67 |
-52:10:35.3 |
HIP 62774 |
5.80 |
| 2026-05-31 12:00 |
12:52:21.27 |
-52:10:07.3 |
HIP 62774 |
5.26 |
| 2026-06-01 00:00 |
12:52:18.90 |
-52:09:39.3 |
HIP 62774 |
4.73 |
| 2026-06-01 12:00 |
12:52:16.57 |
-52:09:11.2 |
HIP 62774 |
4.22 |
| 2026-06-02 00:00 |
12:52:14.26 |
-52:08:43.1 |
HIP 62774 |
3.74 |