메타데이터
| 항목 |
값 |
| Designation |
C/1961 R1 (Humason) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1962-12-10T05:16:13.828800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1963-05-12.0000000 |
| e |
0.98961410 |
| q (au) |
2.133470 |
| a (au) |
205.419821 |
| i (deg) |
153.277926 |
| Ω (om, deg) |
155.439541 |
| ω (w, deg) |
233.562038 |
| M (ma, deg) |
0.051146 |
밝기
산란 + 전체 선형
$$
M_a = (0.444 + 5.517\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
0.444 |
| n |
5.517 |
| gf |
1.000 |
| gb |
-0.889 |
| k |
0.999 |
| δ90 |
9.972 |
| 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 |
| 1961-09-06 |
1962-12-03 |
+0.4532 |
-0.051 |
| 1963-01-24 |
1965-04-30 |
+1.2592 |
+0.904 |
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 |
08:31:02.87 |
+35:00:45.4 |
HIP 41820 |
7.15 |
| 2026-07-29 12:00 |
08:31:04.48 |
+35:00:41.0 |
HIP 41820 |
6.82 |
| 2026-07-30 00:00 |
08:31:06.09 |
+35:00:36.6 |
HIP 41820 |
6.49 |
| 2026-07-30 12:00 |
08:31:07.69 |
+35:00:32.2 |
HIP 41820 |
6.16 |
| 2026-07-31 00:00 |
08:31:09.30 |
+35:00:27.9 |
HIP 41820 |
5.83 |
| 2026-07-31 12:00 |
08:31:10.90 |
+35:00:23.6 |
HIP 41820 |
5.50 |
| 2026-08-01 00:00 |
08:31:12.50 |
+35:00:19.4 |
HIP 41820 |
5.18 |
| 2026-08-01 12:00 |
08:31:14.11 |
+35:00:15.2 |
HIP 41820 |
4.86 |
| 2026-08-02 00:00 |
08:31:15.71 |
+35:00:11.1 |
HIP 41820 |
4.53 |
| 2026-08-02 12:00 |
08:31:17.31 |
+35:00:07.0 |
HIP 41820 |
4.22 |
| 2026-08-03 00:00 |
08:31:18.91 |
+35:00:03.0 |
HIP 41820 |
3.90 |
| 2026-08-03 12:00 |
08:31:20.51 |
+34:59:59.0 |
HIP 41820 |
3.59 |
| 2026-08-04 00:00 |
08:31:22.11 |
+34:59:55.1 |
HIP 41820 |
3.29 |
| 2026-08-04 12:00 |
08:31:23.70 |
+34:59:51.2 |
HIP 41820 |
2.99 |
| 2026-08-05 00:00 |
08:31:25.30 |
+34:59:47.4 |
HIP 41820 |
2.70 |
| 2026-08-05 12:00 |
08:31:26.89 |
+34:59:43.6 |
HIP 41820 |
2.42 |
| 2026-08-06 00:00 |
08:31:28.48 |
+34:59:39.9 |
HIP 41820 |
2.16 |
| 2026-08-06 12:00 |
08:31:30.07 |
+34:59:36.2 |
HIP 41820 |
1.92 |
| 2026-08-07 00:00 |
08:31:31.66 |
+34:59:32.6 |
HIP 41820 |
1.72 |
| 2026-08-07 12:00 |
08:31:33.25 |
+34:59:29.1 |
HIP 41820 |
1.56 |
| 2026-08-08 00:00 |
08:31:34.83 |
+34:59:25.6 |
HIP 41820 |
1.45 |
| 2026-08-08 12:00 |
08:31:36.41 |
+34:59:22.1 |
HIP 41820 |
1.42 |
| 2026-08-09 00:00 |
08:31:37.99 |
+34:59:18.7 |
HIP 41820 |
1.47 |
| 2026-08-09 12:00 |
08:31:39.57 |
+34:59:15.4 |
HIP 41820 |
1.58 |
| 2026-08-10 00:00 |
08:31:41.14 |
+34:59:12.1 |
HIP 41820 |
1.75 |
| 2026-08-10 12:00 |
08:31:42.71 |
+34:59:08.9 |
HIP 41820 |
1.96 |
| 2026-08-11 00:00 |
08:31:44.28 |
+34:59:05.7 |
HIP 41820 |
2.20 |
| 2026-08-11 12:00 |
08:31:45.85 |
+34:59:02.6 |
HIP 41820 |
2.46 |
| 2026-08-12 00:00 |
08:31:47.41 |
+34:58:59.5 |
HIP 41820 |
2.73 |
| 2026-08-12 12:00 |
08:31:48.97 |
+34:58:56.5 |
HIP 41820 |
3.01 |
| 2026-08-13 00:00 |
08:31:50.52 |
+34:58:53.5 |
HIP 41820 |
3.30 |
| 2026-08-13 12:00 |
08:31:52.08 |
+34:58:50.6 |
HIP 41820 |
3.60 |
| 2026-08-14 00:00 |
08:31:53.63 |
+34:58:47.8 |
HIP 41820 |
3.90 |
| 2026-08-14 12:00 |
08:31:55.17 |
+34:58:45.0 |
HIP 41820 |
4.20 |
| 2026-08-15 00:00 |
08:31:56.71 |
+34:58:42.3 |
HIP 41820 |
4.50 |
| 2026-08-15 12:00 |
08:31:58.25 |
+34:58:39.6 |
HIP 41820 |
4.81 |
| 2026-08-16 00:00 |
08:31:59.78 |
+34:58:37.0 |
HIP 41820 |
5.11 |
| 2026-08-16 12:00 |
08:32:01.31 |
+34:58:34.5 |
HIP 41820 |
5.42 |
| 2026-08-17 00:00 |
08:32:02.84 |
+34:58:32.0 |
HIP 41820 |
5.72 |
| 2026-08-17 12:00 |
08:32:04.36 |
+34:58:29.5 |
HIP 41820 |
6.03 |
| 2026-08-18 00:00 |
08:32:05.87 |
+34:58:27.2 |
HIP 41820 |
6.34 |
| 2026-08-18 12:00 |
08:32:07.38 |
+34:58:24.9 |
HIP 41820 |
6.64 |
| 2026-08-19 00:00 |
08:32:08.89 |
+34:58:22.6 |
HIP 41820 |
6.95 |